160 results on '"Ilya E, Kolesnikov"'
Search Results
2. Formation and Photophysical Properties of Silver Clusters in Bulk of Photo-Thermo-Refractive Glass
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Leonid Yu. Mironov, Dmitriy V. Marasanov, Mariia D. Sannikova, Ksenia S. Zyryanova, Artem A. Slobozhaninov, and Ilya E. Kolesnikov
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glass ,luminescence ,silver clusters ,Technology ,Chemical technology ,TP1-1185 - Abstract
The bright luminescence of silver clusters in glass have potential applications in solid-state lighting, optical memory, and spectral converters. In this work, luminescent silver clusters were formed in the bulk of photo-thermo-refractive glass (15Na2O-5ZnO-2.9Al2O3-70.3SiO2-6.5F, mol.%) doped with different Ag2O concentrations from 0.01 to 0.05 mol.%. The spontaneous formation of plasmonic nanoparticles during glass synthesis was observed at 0.05 mol.% of Ag2O in the glass composition, limiting the silver concentration range for cluster formation. The luminescence of silver clusters was characterized by steady-state and time-resolved spectroscopy techniques. The rate constants of fluorescence, phosphorescence, intersystem crossing, and nonradiative deactivation were estimated on the basis of an experimental study. A comparison of the results obtained for the photophysical properties of luminescent silver clusters formed in the ion-exchanged layers of photo-thermo-refractive glass is provided.
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- 2023
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3. Microcrystalline Luminescent (Eu1-xLnx)2bdc3·nH2O (Ln = La, Gd, Lu) Antenna MOFs: Effect of Dopant Content on Structure, Particle Morphology, and Luminescent Properties
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Stefaniia S. Kolesnik, Nikita A. Bogachev, Ilya E. Kolesnikov, Sergey N. Orlov, Mikhail N. Ryazantsev, Gema González, Mikhail Yu. Skripkin, and Andrey S. Mereshchenko
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metal–organic framework ,luminescence ,microcrystals ,rare earth ,europium ,lutetium ,Organic chemistry ,QD241-441 - Abstract
In this work, three series of micro-sized heterometallic europium-containing terephthalate MOFs, (Eu1-xLnx)2bdc3·nH2O (Ln = La, Gd, Lu), are synthesized via an ultrasound-assisted method in an aqueous medium. La3+ and Gd3+-doped terephthalates are isostructural to Eu2bdc3·4H2O. Lu3+-doped compounds are isostructural to Eu2bdc3·4H2O with Lu contents lower than 95 at.%. The compounds that are isostructural to Lu2bdc3·2.5H2O are formed at higher Lu3+ concentrations for the (Eu1-xLux)2bdc3·nH2O series. All materials consist of micrometer-sized particles. The particle shape is determined by the crystalline phase. All the synthesized samples demonstrate an “antenna” effect: a bright-red emission corresponding to the 5D0-7FJ transitions of Eu3+ ions is observed upon 310 nm excitation into the singlet electronic excited state of terephthalate ions. The fine structure of the emission spectra is determined by the crystalline phase due to the different local symmetries of the Eu3+ ions in the different kinds of crystalline structures. The photoluminescence quantum yield and 5D0 excited state lifetime of Eu3+ are equal to 11 ± 2% and 0.44 ± 0.01 ms, respectively, for the Ln2bdc3·4H2O structures. For the (Eu1-xLux)2bdc3·2.5H2O compounds, significant increases in the photoluminescence quantum yield and 5D0 excited state lifetime of Eu3+ are observed, reaching 23% and 1.62 ms, respectively.
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- 2024
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4. Brightly Luminescent (TbxLu1−x)2bdc3·nH2O MOFs: Effect of Synthesis Conditions on Structure and Luminescent Properties
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Viktor G. Nosov, Yulia N. Toikka, Anna S. Petrova, Oleg S. Butorlin, Ilya E. Kolesnikov, Sergey N. Orlov, Mikhail N. Ryazantsev, Stefaniia S. Kolesnik, Nikita A. Bogachev, Mikhail Yu. Skripkin, and Andrey S. Mereshchenko
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metal–organic framework ,luminescence ,rare earth ,terbium ,lutetium ,antenna effect ,Organic chemistry ,QD241-441 - Abstract
Luminescent, heterometallic terbium(III)–lutetium(III) terephthalate metal-organic frameworks (MOFs) were synthesized via direct reaction between aqueous solutions of disodium terephthalate and nitrates of corresponding lanthanides by using two methods: synthesis from diluted and concentrated solutions. For (TbxLu1−x)2bdc3·nH2O MOFs (bdc = 1,4-benzenedicarboxylate) containing more than 30 at. % of Tb3+, only one crystalline phase was formed: Ln2bdc3·4H2O. At lower Tb3+ concentrations, MOFs crystallized as the mixture of Ln2bdc3·4H2O and Ln2bdc3·10H2O (diluted solutions) or Ln2bdc3 (concentrated solutions). All synthesized samples that contained Tb3+ ions demonstrated bright green luminescence upon excitation into the 1ππ* excited state of terephthalate ions. The photoluminescence quantum yields (PLQY) of the compounds corresponding to the Ln2bdc3 crystalline phase were significantly larger than for Ln2bdc3·4H2O and Ln2bdc3·10H2O phases due to absence of quenching from water molecules possessing high-energy O-H vibrational modes. One of the synthesized materials, namely, (Tb0.1Lu0.9)2bdc3·1.4H2O, had one of the highest PLQY among Tb-based MOFs, 95%.
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- 2023
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5. Effect of Gd3+, La3+, Lu3+ Co-Doping on the Morphology and Luminescent Properties of NaYF4:Sm3+ Phosphors
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Viktor G. Nosov, Anna A. Betina, Tatyana S. Bulatova, Polina B. Guseva, Ilya E. Kolesnikov, Sergey N. Orlov, Maxim S. Panov, Mikhail N. Ryazantsev, Nikita A. Bogachev, Mikhail Yu Skripkin, and Andrey S. Mereshchenko
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luminescence ,microcrystals ,nanocrystals ,hydrothermal synthesis ,rare earth ,samarium ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
The series of luminescent NaYF4:Sm3+ nano- and microcrystalline materials co-doped by La3+, Gd3+, and Lu3+ ions were synthesized by hydrothermal method using rare earth chlorides as the precursors and citric acid as a stabilizing agent. The phase composition of synthesized compounds was studied by PXRD. All synthesized materials except ones with high La3+ content (where LaF3 is formed) have a β-NaYF4 crystalline phase. SEM images demonstrate that all particles have shape of hexagonal prisms. The type and content of doping REE significantly effect on the particle size. Upon 400 nm excitation, phosphors exhibit distinct emission peaks in visible part of the spectrum attributed to 4G5/2→6HJ transitions (J = 5/2–11/2) of Sm3+ ion. Increasing the samarium (III) content results in concentration quenching by dipole–dipole interactions, the optimum Sm3+concentration is found to be of 2%. Co-doping by non-luminescent La3+, Gd3+ and Lu3+ ions leads to an increase in emission intensity. This effect was explained from the Sm3+ local symmetry point of view.
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- 2023
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6. 3D Nanocomposite with High Aspect Ratio Based on Polyaniline Decorated with Silver NPs: Synthesis and Application as Electrochemical Glucose Sensor
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Anna A. Vasileva, Daria V. Mamonova, Vladimir Mikhailovskii, Yuri V. Petrov, Yana G. Toropova, Ilya E. Kolesnikov, Gerd Leuchs, and Alina A. Manshina
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glucose sensor ,laser-induced deposition ,polyaniline ,anodic aluminum oxide ,Chemistry ,QD1-999 - Abstract
In this paper, we present a new methodology for creating 3D ordered porous nanocomposites based on anodic aluminum oxide template with polyaniline (PANI) and silver NPs. The approach includes in situ synthesis of polyaniline on templates of anodic aluminum oxide nanomembranes and laser-induced deposition (LID) of Ag NPs directly on the pore walls. The proposed method allows for the formation of structures with a high aspect ratio of the pores, topological ordering and uniformity of properties throughout the sample, and a high specific surface area. For the developed structures, we demonstrated their effectiveness as non-enzymatic electrochemical sensors on glucose in a concentration range crucial for medical applications. The obtained systems possess high potential for miniaturization and were applied to glucose detection in real objects—laboratory rat blood plasma.
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- 2023
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7. ZnTe Crystal Multimode Cryogenic Thermometry Using Raman and Luminescence Spectroscopy
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Evgenii V. Borisov, Alexey A. Kalinichev, and Ilya E. Kolesnikov
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ZnTe ,optical thermometry ,photoluminescence ,Raman spectrum ,cryogenic temperature ,multimode sensing ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
In this study, ZnTe crystal was applied to provide precise thermal sensing for cryogenic temperatures. Multiple techniques, namely Raman and photoluminescence spectroscopies, were used to broaden the operating temperature range and improve the reliability of the proposed thermometers. Raman-based temperature sensing could be applied in the range of 20–100 K, while luminescence-based thermometry could be utilized in a narrower range of 20–70 K. However, the latter strategy provides better relative thermal sensitivity and temperature resolution. The best thermal performances based on a single temperature-dependent parameter attain Sr = 3.82% K−1 and ΔT = 0.12 K at T = 50 K. The synergy between multiple linear regression and multiparametric thermal sensing demonstrated for Raman-based thermometry results in a ten-fold improvement of Sr and a two-fold enhancement of ΔT. All studies performed testify that the ZnTe crystal is a promising multimode contactless optical sensor for cryogenic thermometry.
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- 2023
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8. Green Emissive Copper(I) Coordination Polymer Supported by the Diethylpyridylphosphine Ligand as a Luminescent Sensor for Overheating Processes
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Kamila R. Enikeeva, Aliia V. Shamsieva, Anna G. Strelnik, Robert R. Fayzullin, Dmitry V. Zakharychev, Ilya E. Kolesnikov, Irina R. Dayanova, Tatiana P. Gerasimova, Igor D. Strelnik, Elvira I. Musina, Andrey A. Karasik, and Oleg G. Sinyashin
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Cu4I4 clusters ,P,N-ligands ,copper(I) complexes ,phosphines ,luminescent complexes ,Organic chemistry ,QD241-441 - Abstract
Tertiary diethylpyridylphosphine was synthesized by the reaction of pyridylphosphine with bromoethane in a suberbasic medium. The reaction of phosphine with the copper(I) iodide led to the formation of a copper(I) coordination polymer, which, according to the X-ray diffraction data, has an intermediate structure with a copper-halide core between the octahedral and stairstep geometries of the Cu4I4 clusters. The obtained coordination polymer exhibits a green emission in the solid state, which is caused by the 3(M+X)LCT transitions. The heating up of the copper(I) coordination polymer to 138.5 °C results in its monomerization and the formation of a new solid-state phase. The new phase exhibits a red emission, with the emission band maximum at 725 nm. According to the experimental data and quantum chemical computations, it was concluded that depolymerization probably leads to a complex that is formed with the octahedral structure of the copper-halide core. The resulting solid-state phase can be backward-converted to the polymer phase via recrystallization from the acetone or DMF. Therefore, the obtained coordination polymer can be considered a sensor or detector for the overheating of processes that should be maintained at temperatures below 138 °C (e.g., engines, boiling liquids, solar heat systems, etc.).
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- 2023
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9. Laser-Induced Synthesis of Electrocatalytically Active Ag, Pt, and AgPt/Polyaniline Nanocomposites for Hydrogen Evolution Reactions
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Anna A. Vasileva, Daria V. Mamonova, Yuri V. Petrov, Ilya E. Kolesnikov, Gerd Leuchs, and Alina A. Manshina
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laser-induced deposition ,polyaniline ,noble metal nanoparticles ,AgPt nanoparticles ,nanocomposite ,hydrogen evolution reaction ,Chemistry ,QD1-999 - Abstract
We present an efficient and easily implemented approach for creating stable electrocatalytically active nanocomposites based on polyaniline (PANI) with metal NPs. The approach combines in situ synthesis of polyaniline followed by laser-induced deposition (LID) of Ag, Pt, and AgPt NPs. The observed peculiarity of LID of PANI is the role of the substrate during the formation of multi-metallic nanoparticles (MNP). This allows us to solve the problem of losing catalytically active particles from the electrode’s surface in electrochemical use. The synthesized PANI/Ag, PANI/Pt, and PANI/AgPt composites were studied with different techniques, such as SEM, EDX, Raman spectroscopy, and XPS. These suggested a mechanism for the formation of MNP on PANI. The MNP–PANI interaction was demonstrated, and the functionality of the nanocomposites was studied through the electrocatalysis of the hydrogen evolution reaction. The PANI/AgPt nanocomposites demonstrated both the best activity and the most stable metal component in this process. The suggested approach can be considered as universal, since it can be extended to the creation of electrocatalytically active nanocomposites with various mono- and multi-metallic NPs.
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- 2022
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10. Aurophilic Interactions of Dimeric Bisphosphine Gold(I) Complexes Pre-Organized by the Structure of the 1,5-Diaza-3,7-Diphosphacyclooctanes
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Irina R. Dayanova, Adelina I. Fayezova, Igor D. Strelnik, Igor A. Litvinov, Daut R. Islamov, Ilya E. Kolesnikov, Tatiana P. Gerasimova, Elvira I. Musina, and Andrey A. Karasik
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gold(I) complexes ,luminescence ,d10-complexes ,aminomethylphosphines ,bisphosphines ,Inorganic chemistry ,QD146-197 - Abstract
The dimeric gold(I) chloride and gold(I) iodide complexes ([L2Au]Cl2 and L2AuI2) on the scaffold of the cyclic bisphosphine, namely 1,5-diaza-3,7-diphosphacyclooctane containing α-phenylbenzyl (benzhydryl) substituents at the nitrogen atoms, were synthesized. The obtained complexes were isolated as white crystalline powders. The single crystal XRD of the obtained complexes revealed the strong aurophilic interactions between two gold(I) atoms with the Au…Au distance values of 2.9977(6) and 3.1680(5) Å. The comparison of the gold complexes, based on the N,N-diaryl- and N,N-dibenzhydryl substituted 1,5-diaza-3,7-diphosphacyclooctanes, allowed to reveal the strong impact of the initial heterocycle conformation on the realization of the aurophilic interactions, where the geometry of N,N-dibenzhydryl substituted 1,5-diaza-3,7-diphosphacyclooctane, is pre-organized for the intramolecular aurophilic interactions of the complexes. The obtained complexes exhibit a bluish-green phosphorescence (λem 505 (-Cl) and 530(-I)) in the solid state at room temperature, originated by the metal-halide centered transitions, which was confirmed by the TDDFT calculations. It was found that the aurophilic interactions are realized in the ground and in the triplet excited states of the complexes. The slighter change of the geometry of the N,N-dibenzhydryl substituted gold(I) iodide complexes, under the transition from the ground state to the excited state, in comparison with their N,N-diaryl substituted analogues, results in the reduced values of the Stokes shift of luminescence (ca. 150 nm vs. 175 nm).
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- 2022
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11. Near-Infrared Emission of HgTe Nanoplatelets Tuned by Pb-Doping
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Anastasiia V. Sokolova, Ivan D. Skurlov, Anton A. Babaev, Peter S. Perfenov, Maksim A. Miropoltsev, Denis V. Danilov, Mikhail A. Baranov, Ilya E. Kolesnikov, Aleksandra V. Koroleva, Evgeniy V. Zhizhin, Aleksandr P. Litvin, Anatoly V. Fedorov, and Sergei A. Cherevkov
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nanoplatelets ,near-infrared emission ,cation exchange ,photosensitivity ,Chemistry ,QD1-999 - Abstract
Doping the semiconductor nanocrystals is one of the most effective ways to obtain unique materials suitable for high-performance next-generation optoelectronic devices. In this study, we demonstrate a novel nanomaterial for the near-infrared spectral region. To do this, we developed a partial cation exchange reaction on the HgTe nanoplatelets, substituting Hg cations with Pb cations. Under the optimized reaction conditions and Pb precursor ratio, a photoluminescence band shifts to ~1100 nm with a quantum yield of 22%. Based on steady-state and transient optical spectroscopies, we suggest a model of photoexcitation relaxation in the HgTe:Pb nanoplatelets. We also demonstrate that the thin films of doped nanoplatelets possess superior electric properties compared to their pristine counterparts. These findings show that Pb-doped HgTe nanoplatelets are new perspective material for application in both light-emitting and light-detection devices operating in the near-infrared spectral region.
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- 2022
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12. Effect of doping concentration on dual-mode LaVO4:Eu3+ luminescence thermometers
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Ilya E. Kolesnikov, Daria V. Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, and Evgenii Yu Kolesnikov
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Process Chemistry and Technology ,Materials Chemistry ,Ceramics and Composites ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Published
- 2023
13. Heterometallic Europium(III)–Lutetium(III) Terephthalates as Bright Luminescent Antenna MOFs
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Viktor G. Nosov, Arkady S. Kupryakov, Ilya E. Kolesnikov, Aleksandra A. Vidyakina, Ilya I. Tumkin, Stefaniia S. Kolesnik, Mikhail N. Ryazantsev, Nikita A. Bogachev, Mikhail Yu. Skripkin, and Andrey S. Mereshchenko
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metal–organic framework ,luminescence ,rare earth ,europium ,lutetium ,phase transition ,Organic chemistry ,QD241-441 - Abstract
A new series of luminescent heterometallic europium(III)–lutetium(III) terephthalate metal–organic frameworks, namely (EuxLu1−x)2bdc3·nH2O, was synthesized using a direct reaction in a water solution. At the Eu3+ concentration of 1–40 at %, the MOFs were formed as a binary mixture of the (EuxLu1−x)2bdc3 and (EuxLu1−x)2bdc3·4H2O crystalline phases, where the Ln2bdc3·4H2O crystalline phase was enriched by europium(III) ions. At an Eu3+ concentration of more than 40 at %, only one crystalline phase was formed: (EuxLu1−x)2bdc3·4H2O. All MOFs containing Eu3+ exhibited sensitization of bright Eu3+-centered luminescence upon the 280 nm excitation into a 1ππ* excited state of the terephthalate ion. The fine structure of the emission spectra of Eu3+ 5D0-7FJ (J = 0–4) significantly depended on the Eu3+ concentration. The luminescence quantum yield of Eu3+ was significantly larger for Eu-Lu terephthalates containing a low concentration of Eu3+ due to the absence of Eu-Eu energy migration and the presence of the Ln2bdc3 crystalline phase with a significantly smaller nonradiative decay rate compared to the Ln2bdc3·4H2O.
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- 2022
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14. Water-soluble multimode fluorescent thermometers based on porphyrins photosensitizers
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Ilya E. Kolesnikov, Mikhail A. Kurochkin, Ivan N. Meshkov, Roman A. Akasov, Alexey A. Kalinichev, Evgenii Yu. Kolesnikov, Yulia G. Gorbunova, and Erkki Lähderanta
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Fluorescent thermometry ,Water-soluble porphyrin ,Sensor ,Lifetime ,Cytotoxicity ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Anti-cancer treatment efficiency can be significantly enhanced by the synergistic effect of the combined phototherapy that nowadays is under intensive preclinical and clinical studies. To minimize collateral damage, the combined phototherapy should be accompanied by a real-time thermal sensing. However, it is still challenging to develop multifunctional agent which combines therapy and temperature control. In the present study, contactless fluorescent thermometry based on ratiometric and lifetime approaches was realized using water-soluble anionic meso-tetrasulfonatophenylporphyrinate (tetra sodium salt) TSPH2 and cationic meso-mono(4-pyridyl)-triphenylporphyrinato)phosphorus(V) bromide MPyPP(OH)2 porphyrins photosensitizers. Both sensing techniques provide simple linear calibration curves in the biological temperature range. Thermometric performance of the suggested porphyrins was evaluated in terms of relative sensitivity, temperature resolution and repeatability and was found to be in upper range among porphyrin-based thermometers reaching 1% K−1 and 0.1 °C. The relative sensitivity was enhanced from 2 to 7 times by using peak-to-valley ratio compared to usual peak-to-peak ratio. Porphyrins' cytotoxicity was studied in vitro both in dark and blue-light activated conditions. Exposure-dependent cell viability showed that porphyrins could be used as molecular thermometers for phototherapy to avoid heat-induced adverse effects or as promising photosensitizers depending on chosen laser power.
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- 2021
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15. Effect of calcination temperature on thermometric performances of ratiometric co-doped Gd2O3:Tb3+,Eu3+ nanothermometers
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Ilya E. Kolesnikov, Daria V. Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, Evgenii V. Borisov, and Evgenii Yu Kolesnikov
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Process Chemistry and Technology ,Materials Chemistry ,Ceramics and Composites ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Published
- 2023
16. Photoluminescence and Energy Transfer in Double- and Triple-Lanthanide-Doped YVO4 Nanoparticles
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Vassiliy A. Medvedev, Ilya E. Kolesnikov, Pavel K. Olshin, Mikhail D. Mikhailov, Alina A. Manshina, and Daria V. Mamonova
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oxide nanoparticles ,luminescence kinetics ,rare earth ions ,codoped systems ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Optical materials doped with several lanthanides are unique in their properties and are widely used in various fields of science and technology. The study of these systems provides solutions for noncontact thermometry, bioimaging, sensing technology, and others. In this paper, we report on the demonstration of YVO4 nanoparticles doped with one, two, and three different rare earth ions (Tm3+, Er3+, and Nd3+). We discuss the morphology, structural properties, and luminescence behavior of particles. Luminescence decay kinetics reveal the energy transfer efficiency (up to 78%) for different ions under the selective excitation of individual ions. Thus, we found that the energy transition from Tm3+ is more favorable than from Er3+ while we did not observe any significant energy rearrangement in the samples under the excitation of Nd3+. The observed strong variation of REI lifetimes makes the suggested nanoparticles promising for luminescent labeling, anticounterfeiting, development of data storage systems, etc.
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- 2022
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17. Structural data of phenanthrene-9,10-dicarbonitriles
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Anastasiia M. Afanasenko, Alexander S. Novikov, Tatiana G. Chulkova, Yakov M. Grigoriev, Ilya E. Kolesnikov, Stanislav I. Selivanov, Galina L. Starova, Andrey A. Zolotarev, Anatoly N. Vereshchagin, and Michail N. Elinson
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Computer applications to medicine. Medical informatics ,R858-859.7 ,Science (General) ,Q1-390 - Abstract
In this data article, we present the single-crystal XRD data of phenanthrene-9,10-dicarbonitriles. Detailed structure analysis and photophysical properties were discussed in our previous study, “Intermolecular interactions-photophysical properties relationships in phenanthrene-9,10-dicarbonitrile assemblies” (Afanasenko et al., 2020). The data include the intra- and intermolecular bond lengths and angles. Keywords: Aromatic stacking interactions, Non-covalent interactions, Phenanthrene-9,10-dicarbonitriles, Single-crystal X-ray diffraction
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- 2019
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18. Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles
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Daria V. Mamonova, Anna A. Vasileva, Yuri V. Petrov, Alexandra V. Koroleva, Denis V. Danilov, Ilya E. Kolesnikov, Gulia I. Bikbaeva, Julien Bachmann, and Alina A. Manshina
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laser-induced deposition ,noble metal NPs ,multimetallic nanoparticles ,plasmon resonance ,Chemistry ,QD1-999 - Abstract
Multimetallic plasmonic systems usually have distinct advantages over monometallic nanoparticles due to the peculiarity of the electronic structure appearing in advanced functionality systems, which is of great importance in a variety of applications including catalysis and sensing. Despite several reported techniques, the controllable synthesis of multimetallic plasmonic nanoparticles in soft conditions is still a challenge. Here, mono-, bi- and tri-metallic nanoparticles were successfully obtained as a result of a single step laser-induced deposition approach from monometallic commercially available precursors. The process of nanoparticles formation is starting with photodecomposition of the metal precursor resulting in nucleation and the following growth of the metal phase. The deposited nanoparticles were studied comprehensively with various experimental techniques such as SEM, TEM, EDX, XPS, and UV-VIS absorption spectroscopy. The size of monometallic nanoparticles is strongly dependent on the type of metal: 140–200 nm for Au, 40–60 nm for Ag, 2–3 nm for Pt. Bi- and trimetallic nanoparticles were core-shell structures representing monometallic crystallites surrounded by an alloy of respective metals. The formation of an alloy phase took place between monometallic nanocrystallites of different metals in course of their growth and agglomeration stage.
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- 2021
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19. Re(I) Complexes as Backbone Substituents and Cross-Linking Agents for Hybrid Luminescent Polysiloxanes and Silicone Rubbers
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Egor M. Baranovskii, Victoria V. Khistiaeva, Konstantin V. Deriabin, Stanislav K. Petrovskii, Igor O. Koshevoy, Ilya E. Kolesnikov, Elena V. Grachova, and Regina M. Islamova
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functional polysiloxanes ,rhenium complexes ,luminescent polysiloxanes ,luminescent silicone rubbers ,azide-alkyne cycloaddition ,Organic chemistry ,QD241-441 - Abstract
This study focuses on the synthesis of hybrid luminescent polysiloxanes and silicone rubbers grafted by organometallic rhenium(I) complexes using Cu(I)-catalyzed azido-alkyne cycloaddition (CuAAC). The design of the rhenium(I) complexes includes using a diimine ligand to create an MLCT luminescent center and the introduction of a triple C≡C bond on the periphery of the ligand environment to provide click-reaction capability. Poly(3-azidopropylmethylsiloxane-co-dimethylsiloxane) (N3-PDMS) was synthesized for incorporation of azide function in polysiloxane chain. [Re(CO)3(MeCN)(5-(4-ethynylphenyl)-2,2′-bipyridine)]OTf (Re1) luminescent complex was used to prepare a luminescent copolymer with N3-PDMS (Re1-PDMS), while [Re(CO)3Cl(5,5′-diethynyl-2,2′-bipyridine)] (Re2) was used as a luminescent cross-linking agent of N3-PDMS to obtain luminescent silicone rubber (Re2-PDMS). The examination of photophysical properties of the hybrid polymer materials obtained show that emission profile of Re(I) moiety remains unchanged and metallocenter allows to control the creation of polysiloxane-based materials with specified properties.
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- 2021
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20. The Role of Thermally Activated Quenching and Energy Migration in Luminescence of Silver Clusters in Glasses
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Leonid Yu. Mironov, Dmitriy V. Marasanov, Mariia D. Ulshina, Yevgeniy M. Sgibnev, Ilya E. Kolesnikov, and Nikolay V. Nikonorov
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General Energy ,Physical and Theoretical Chemistry ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Published
- 2022
21. Ultrasound-Assisted Synthesis of Luminescent Micro- and Nanocrystalline Eu-Based MOFs as Luminescent Probes for Heavy Metal Ions
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Stefaniia S. Kolesnik, Viktor G. Nosov, Ilya E. Kolesnikov, Evgenia M. Khairullina, Ilya I. Tumkin, Aleksandra A. Vidyakina, Alevtina A. Sysoeva, Mikhail N. Ryazantsev, Maxim S. Panov, Vasiliy D. Khripun, Nikita A. Bogachev, Mikhail Yu. Skripkin, and Andrey S. Mereshchenko
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metal-organic framework ,luminescence ,rare earth ,europium ,nanoparticle ,luminescent probe ,Chemistry ,QD1-999 - Abstract
The luminescent coarse-, micro- and nanocrystalline europium(III) terephthalate tetrahydrate (Eu2bdc3·4H2O) metal-organic frameworks were synthesized by the ultrasound-assisted wet-chemical method. Electron micrographs show that the europium(III) terephthalate microparticles are 7 μm long leaf-like plates. According to the dynamic light scattering technique, the average size of the Eu2bdc3·4H2O nanoparticles is equal to about 8 ± 2 nm. Thereby, the reported Eu2bdc3·4H2O nanoparticles are the smallest nanosized rare-earth-based MOF crystals, to the best of our knowledge. The synthesized materials demonstrate red emission due to the 5D0–7FJ transitions of Eu3+ upon 250 nm excitation into 1ππ* state of the terephthalate ion. Size reduction results in broadened emission bands, an increase in the non-radiative rate constants and a decrease in both the quantum efficiency of the 5D0 level and Eu3+ and the luminescence quantum yields. Cu2+, Cr3+, and Fe3+ ions efficiently and selectively quench the luminescence of nanocrystalline europium(III) terephthalate, which makes it a prospective material for luminescent probes to monitor these ions in waste and drinking water.
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- 2021
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22. Lanthanide(III)-Incorporating Polysiloxanes as Materials for Light-Emitting Devices
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Anna S. Miroshnichenko, Konstantin V. Deriabin, Artem I. Baranov, Vladimir Neplokh, Dmitry M. Mitin, Ilya E. Kolesnikov, Mikhail V. Dobrynin, Elizaveta K. Parshina, Ivan S. Mukhin, and Regina M. Islamova
- Subjects
Polymers and Plastics ,Process Chemistry and Technology ,Organic Chemistry - Published
- 2022
23. Synthesis of weakly-agglomerated luminescent CaWO4:Nd3+ particles by modified Pechini method
- Author
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Alina Manshina, Vassily A. Medvedev, Erkki Lähderanta, Irina M. Shubina, Ilya E. Kolesnikov, Daria V. Mamonova, and M. D. Mikhailov
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Materials science ,Process Chemistry and Technology ,Doping ,Nanoparticle ,Thermal treatment ,Crystal structure ,Crystallographic defect ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Chemical engineering ,Materials Chemistry ,Ceramics and Composites ,Particle ,Dispersion (chemistry) ,Luminescence - Abstract
The specific luminescence behavior of crystalline oxide particles doped with rare earth ions strongly depends on the initial composition of the host material and synthesis conditions. This issue is especially significant for non-isovalent doping in the crystal lattice. In this case, the formation of the structure is accompanied by the formation of point defects serving as charge compensators. The work is devoted to the synthesis of CaWO4:Nd3+ particles in the salt melt (modified Pechini method) and the study of structural and luminescent properties under varying synthesis conditions. It was found that temperature and duration of heat treatment in the salt melt (KCl) affected the crystal structure, the size of coherent scattering regions, luminescence intensity, and lifetime. An increase of heat treatment temperature led to a reduction of luminescence intensity and lifetime due to the formation of point defects. The optimal synthesis conditions for obtaining the highest luminescence intensity of CaWO4:Nd3+ crystalline particles in salt melt were found to be the following Т1= 600 °C; t1=2 h (the stage of polymer gel thermal treatment), Т2= 800 °C; t2=1 h (the stage of thermal treatment in KCl salt melt). As-synthesized CaWO4:Nd3+ powders contain both coarse and fine fractions. However weak particle agglomeration allowed obtaining a water dispersion with individual nanoparticles (up to 200 nm) after ultrasonic treatment. According to the obtained results, the synthesized material is characterized by high luminescence intensity and high dispersion, and promising as fluorescent thermometers and biological labels.
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- 2022
24. Stereoselective Synthesis of Multisubstituted Cyclohexanes by Reaction of Conjugated Enynones with Malononitrile in the Presence of LDA
- Author
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Anastasiya V. Igushkina, Alexander A. Golovanov, Irina A. Boyarskaya, Ilya E. Kolesnikov, and Aleksander V. Vasilyev
- Subjects
conjugated enynones ,malononitrile ,cyclohexanes ,carbanionic reactions ,photoluminescent compounds ,Organic chemistry ,QD241-441 - Abstract
Reaction of linear conjugated enynones, 1,5-diarylpent-2-en-4-yn-1-ones, with malononitrile in the presence of lithium diisopropylamide LDA, as a base, in THF at room temperature for 3–7 h resulted in the formation of the product of dimerization, multisubstituted polyfunctional cyclohexanes, 4-aryl-2,6-bis(arylethynyl)-3-(aryloxomethyl)-4-hydroxycyclohexane-1,1-dicarbonitriles, in yields up to 60%. Varying the reaction conditions by decreasing time and temperature and changing the ratio of starting compounds (enynone and malononitrile) allowed isolating some intermediate compounds, which confirmed a plausible reaction mechanism. The relative stability of possible stereoisomers of such cyclohexanes was estimated by quantum chemical calculations (DFT method). The obtained cyclohexanes were found to possess photoluminescent properties.
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- 2020
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25. Laser-Induced Deposition of Plasmonic Ag and Pt Nanoparticles, and Periodic Arrays
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Daria V. Mamonova, Anna A. Vasileva, Yuri V. Petrov, Denis V. Danilov, Ilya E. Kolesnikov, Alexey A. Kalinichev, Julien Bachmann, and Alina A. Manshina
- Subjects
laser-induced deposition ,noble metal NPs ,plasmon resonance ,nano-grating structures ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Surfaces functionalized with metal nanoparticles (NPs) are of great interest due to their wide potential applications in sensing, biomedicine, nanophotonics, etc. However, the precisely controllable decoration with plasmonic nanoparticles requires sophisticated techniques that are often multistep and complex. Here, we present a laser-induced deposition (LID) approach allowing for single-step surface decoration with NPs of controllable composition, morphology, and spatial distribution. The formation of Ag, Pt, and mixed Ag-Pt nanoparticles on a substrate surface was successfully demonstrated as a result of the LID process from commercially available precursors. The deposited nanoparticles were characterized with SEM, TEM, EDX, X-ray diffraction, and UV-VIS absorption spectroscopy, which confirmed the formation of crystalline nanoparticles of Pt (3–5 nm) and Ag (ca. 100 nm) with plasmonic properties. The advantageous features of the LID process allow us to demonstrate the spatially selective deposition of plasmonic NPs in a laser interference pattern, and thereby, the formation of periodic arrays of Ag NPs forming diffraction grating
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- 2020
- Full Text
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26. Influence of Stabilizing Ion Content on the Structure, Photoluminescence and Biological Properties of Zr1–xEuxO2–0.5x Nanoparticles
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Alexander N. Bugrov, Ruslan Yu. Smyslov, Anastasia Yu. Zavialova, Gennady P. Kopitsa, Tamara V. Khamova, Demid A. Kirilenko, Ilya E. Kolesnikov, Dmitrii V. Pankin, Vadim A. Baigildin, and Christophe Licitra
- Subjects
hydrothermal synthesis ,zirconia ,rare-earth ions ,phase composition ,photoluminescence ,cytotoxicity ,Crystallography ,QD901-999 - Abstract
Quasi-spherical nanoparticles of ZrO2 containing EuO1.5 from 2 to 15 mol.% were synthesized from the chlorides of the corresponding metals under hydrothermal conditions. The structural changes of Zr1–xEuxO2–0.5x (x = 0.02 ÷ 0.15) nanoparticles depending on the content of europium (III) ions were studied using the complementary methods (X-ray diffraction, electron microdiffraction, Raman and photoluminescence spectroscopy). It was shown that increasing the Eu3+ concentration in the Zr1–xEuxO2–0.5x nanoparticles leads to a transition from the equilibrium monoclinic zirconia phase to metastable tetragonal and cubic polymorphic modifications. In this case, the size of the nanoparticles decreases from 11.5 nm to 9 nm; the specific surface area grows from 80.2 to 111.3 m2/g, and the electrokinetic potential increases monotonously from −8.7 to 16.3 mV. The evolution of the phase composition of Zr1–xEuxO2-0.5x nanoparticles from monoclinic to tetragonal/cubic allomorphs with an increase in the molar fraction of stabilizer ions was correlated with changes in the sublevel structure of 5D0 → 7F2 and 5D0 → 7F4 optical transitions for Eu3+ in the luminescence spectra. Besides, for the nanoparticles obtained by hydrothermal synthesis from chlorides, the quantum efficiency does not exceed 3%. According to the M.T.T. assay, as a result of three-day human fibroblast cultivation in the aqueous dispersion of Zr1–xEuxO2–0.5x (x = 0.02 ÷ 0.15) nanoparticles, the proliferation activity of the cells is maintained, indicating that they do not have cytotoxic properties. Such nanoparticles can be used in organic–inorganic composites for medical applications in order to strengthen the polymer scaffolds and visualize changes in their structure within time.
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- 2020
- Full Text
- View/download PDF
27. Upconverting NIR-to-NIR LuVO4:Nd3+/Yb3+ Nanophosphors for High-Sensitivity Optical Thermometry
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Ilya E. Kolesnikov, Elena V. Afanaseva, Mikhail A. Kurochkin, Elena I. Vaishlia, Alexey A. Kalinichev, Evgenii Yu. Kolesnikov, and Erkki Lähderanta
- Subjects
General Materials Science - Published
- 2022
28. Double-doped YVO4 nanoparticles as optical dual-center ratiometric thermometers
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Ilya E. Kolesnikov, Daria V. Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, Gongxun Bai, Tatiana Yu. Ivanova, Evgenii V. Borisov, and Evgenii Yu. Kolesnikov
- Subjects
General Physics and Astronomy ,Physical and Theoretical Chemistry - Abstract
A series of double-doped YVO4 nanoparticles demonstrated contactless optical thermometry within the 298–573 K range using a ratiometric approach.
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- 2022
29. Low-doped LaVO4:Eu3+ phosphor for multimode optical thermal sensing
- Author
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Ilya E. Kolesnikov, Daria V. Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, and Evgenii Yu. Kolesnikov
- Subjects
General Physics and Astronomy ,Physical and Theoretical Chemistry - Abstract
Low-doped LaVO4:Eu3+ powder provides accurate thermal sensing using different ratiometric strategies, charge transfer band position and bandwidth.
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- 2022
30. YVO4 Nanoparticles Doped with Eu3+ and Nd3+ for Optical Nanothermometry
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Daria V. Mamonova, Ilya E. Kolesnikov, Erkki Lähderanta, M.A. Kurochkin, Evgenii Yu Kolesnikov, and Alina Manshina
- Subjects
Materials science ,Doping ,Nanoparticle ,General Materials Science ,Nanotechnology - Published
- 2021
31. Low-doped LaVO
- Author
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Ilya E, Kolesnikov, Daria V, Mamonova, Mikhail A, Kurochkin, Vassily A, Medvedev, and Evgenii Yu, Kolesnikov
- Abstract
In the last decade much attention has been paid to the development of novel approaches in luminescence thermometry, which could allow contactless and noninvasive temperature sensing when traditional thermometers are useless. Typically, an optical thermometer exploits a distinct luminescence parameter to define temperature. However, the use of multimode sensors can significantly broaden the working range and improve the reliability of the temperature measurements. In this work, a Eu
- Published
- 2022
32. Gd3+-Doping Effect on Upconversion Emission of NaYF4: Yb3+, Er3+/Tm3+ Microparticles
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Aleksandra A. Vidyakina, Ilya E. Kolesnikov, Nikita A. Bogachev, Mikhail Y. Skripkin, Ilya I. Tumkin, Erkki Lähderanta, and Andrey S. Mereshchenko
- Subjects
upconversion ,luminescence ,microcrystals ,hydrothermal synthesis ,rare earth ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
β-NaYF4 microcrystals co-doped with Yb3+, Er3+/Tm3+, and Gd3+ ions were synthesized via a hydrothermal method using rare-earth chlorides as the precursors. The SEM and XRD data show that the doped β-NaYF4 form uniform hexagonal prisms with an approximate size of 600–800 nm. The partial substitution of Y by Gd results in size reduction of microcrystals. Upconversion luminescence spectra of microcrystals upon 980 nm excitation contain characteristic intra-configurational ff bands of Er3+/Tm3+ ions. An addition of Gd3+ ions leads to a significant enhancement of upconversion luminescence intensity with maxima at 5 mol % of dopant.
- Published
- 2020
- Full Text
- View/download PDF
33. Structure and Luminescence Properties of Gd2(WO4)3 and Gd2(WO4)3:Tm3+,Yb3+ Nanopowders Prepared by Solid-State Sintering and the Pechini Methods
- Author
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E. V. Afanaseva, E. I. Vaishlia, V. D. Andreeva, and Ilya E. Kolesnikov
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Diffraction ,Materials science ,Morphology (linguistics) ,Scanning electron microscope ,General Chemical Engineering ,Doping ,Metals and Alloys ,Analytical chemistry ,Sintering ,Nanoparticle ,Inorganic Chemistry ,Agglomerate ,Materials Chemistry ,Luminescence - Abstract
Gd2(WO4)3 and Gd2(WO4)3:0.5% Tm3+, 10% Yb3+ nanopowders have been prepared by the Pechini method and solid-state sintering. According to X-ray diffraction results, the materials prepared by the Pechini method are more uniform in phase composition. Optimal synthesis conditions were defined: t = 900°C and τ = 1 h for Gd2(WO4)3 and t = 950°C and τ = 3 h for Gd2(WO4)3:0.5% Tm3+, 10% Yb3+. The surface morphology of the materials has been studied by scanning electron microscopy. The samples prepared by solid-state sintering have been found to be highly agglomerated, and large agglomerates have been shown to persist even after ultrasonic processing. The average size of the doped and undoped nanoparticles prepared by the Pechini method has been determined to be 44.0 and 47.6 nm, respectively. Luminescence spectra of Gd2(WO4)3:0.5% Tm3+, 10% Yb3+ were measured and compared the intensities of the Tm3+ 1G4 → 3H6, 1G4 → 3F4, 3F1,2→3H6, and 3H4 → 3H6 radiative transitions in the materials prepared by both methods. The data obtained in this study demonstrate that the Pechini process is a preferable and promising method for the synthesis of Gd2(WO4)3 and Gd2(WO4)3:Tm3+,Yb3+ nanopowders.
- Published
- 2021
34. Microcrystalline Anti-Stokes Luminophores NaYF4 Doped with Ytterbium, Erbium, and Lutetium Ions
- Author
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O. V. Freinkman, Ilya E. Kolesnikov, D. A. Zheglov, N. A. Bogachev, Aleksandra A. Vidyakina, M. Yu. Skripkin, A. V. Oleinik, and Andrey S. Mereshchenko
- Subjects
Erbium ,Ytterbium ,Microcrystalline ,chemistry ,Doping ,chemistry.chemical_element ,Physical chemistry ,Hydrothermal synthesis ,General Chemistry ,Luminescence ,Lutetium ,Ion - Abstract
Microcrystalline anti-Stokes luminophores NaY1–x–y–zYbxEryLuzF4 were obtained for the first time by hydrothermal synthesis. These compounds crystallize in the hexagonal crystal system, structural type β-NaYF4. It was found that the addition of a non-luminescent lutetium(III) ions results in up-conversion luminescence enhancement in more than 2 times upon 980 nm excitation.
- Published
- 2021
35. Double-doped YVO
- Author
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Ilya E, Kolesnikov, Daria V, Mamonova, Mikhail A, Kurochkin, Vassily A, Medvedev, Gongxun, Bai, Tatiana Yu, Ivanova, Evgenii V, Borisov, and Evgenii Yu, Kolesnikov
- Abstract
Crystalline inorganic nanoparticles doped with rare earth ions are widely used in a variety of scientific and industry applications due to the unique spectroscopic properties. The temperature dependence of their luminescence parameters makes them promising candidates for self-referencing thermal sensing. Here we report single phase YVO
- Published
- 2022
36. Ratiometric thermometry using single Er
- Author
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Ilya E, Kolesnikov, Daria V, Mamonova, Mikhail A, Kurochkin, Vassily A, Medvedev, Gongxun, Bai, and Evgenii Yu, Kolesnikov
- Abstract
Single doped CaWO
- Published
- 2022
37. Assembly of Heterometallic AuICu2I2 Cores on the Scaffold of NPPN-Bridging Cyclic Bisphosphine
- Author
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Daut R. Islamov, Aliia V. Shamsieva, Robert R. Fayzullin, Andrey A. Karasik, Evamarie Hey-Hawkins, Irina R. Dayanova, Ilya E. Kolesnikov, Alina F. Saifina, Elvira I. Musina, Igor D. Strelnik, and Tatiana P. Gerasimova
- Subjects
chemistry.chemical_classification ,010405 organic chemistry ,Chemistry ,Iodide ,Solid-state ,chemistry.chemical_element ,Nuclear magnetic resonance spectroscopy ,ESI mass spectrometry ,010402 general chemistry ,01 natural sciences ,Copper ,0104 chemical sciences ,Ion ,Inorganic Chemistry ,Crystallography ,Diphosphines ,Emission spectrum ,Physical and Theoretical Chemistry - Abstract
The row of metallocyclic dinuclear gold(I) complexes with cyclic diphosphines, namely, P-pyridylethyl-substituted 1,5-diaza-3,7-diphosphacyclooctanes, has been obtained. Further interaction of the dinuclear gold(I) complexes with copper(I) iodide gave the first examples of hexanuclear AuI/CuI complexes containing two unusual trinuclear AuICu2I2 fragments. The structures of di- and hexanuclear complexes were confirmed by NMR spectroscopy, ESI mass spectrometry, elemental analysis, and single-crystal X-ray diffraction. All of the obtained complexes are moderate emitters in the solid state. Dinuclear gold(I) complexes displayed a greenish emission with the maxima in the emission spectra at ca. 550 nm. The obtained hexanuclear heterobimetallic AuI/CuI complexes are triplet solid-state blue emitters with the maximum in the emission spectra at 463 and 484 nm. According to the TD-DFT calculations, the observed emission of all studied complexes had a triplet origin and was caused by the 3CC or 3(MLCT) T1 → S0 transitions for dinuclear and hexanuclear complexes, respectively.
- Published
- 2021
38. Europium-activated phosphor Ba3Lu2B6O15: Influence of isomorphic substitution on photoluminescence properties
- Author
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Ilya E. Kolesnikov, Stanislav K. Filatov, Y.P. Biryukov, Alexey Povolotskiy, Anastasia Povolotckaia, Rimma S. Bubnova, and O. Yu. Shorets
- Subjects
010302 applied physics ,Materials science ,Photoluminescence ,Process Chemistry and Technology ,Doping ,chemistry.chemical_element ,Phosphor ,02 engineering and technology ,Crystal structure ,021001 nanoscience & nanotechnology ,01 natural sciences ,Lutetium ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,Physical chemistry ,Chromaticity ,0210 nano-technology ,Luminescence ,Europium - Abstract
This work demonstrates the luminescent properties of Ba3Lu2B6O15 phosphors doped with Eu3+ ions for the first time. The Ba3(Lu1–xEux)2B6O15 (x = 0.01–0.375) phosphors have been prepared using a multi-step high-temperature solid-state synthesis. X-ray diffraction measurements verify the successful isomorphic substitution of the Lu3+ sites by the Eu3+ ions. The luminescence properties and its dependence on the crystal structure of Ba3(Lu1–xEux)2B6O15 have been reported in this work. There are two nonequivalent sites in this crystal structures occupied by lutetium, both of them can be consistently substituted by the Eu3+ ions. The highest emission intensity with quantum yield of 17% was demonstrated by Ba3(Lu0.82Eu0.18)2B6O15 powder. Increase of Eu3+ doping concentration leads to gradual change of chromaticity from violet to red. It was expected that Ba3(Lu1–xEux)2B6O15 phosphors can be used as a phosphor with predicted chromaticity under LED excitation.
- Published
- 2021
39. Optical Thermometry by Monitoring Dual Emissions from YVO4 and Eu3+ in YVO4:Eu3+ Nanoparticles
- Author
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Daria V. Mamonova, Evgenii Yu. Kolesnikov, Erkki Lähderanta, Ilya E. Kolesnikov, and M.A. Kurochkin
- Subjects
Materials science ,Temperature sensing ,business.industry ,Optical thermometry ,Optoelectronics ,Nanoparticle ,General Materials Science ,Luminescence ,business - Abstract
Contactless optical thermometry is successfully applied for accurate local temperature sensing in many scientific and technological areas. The majority of optical thermometers utilize a ratiometric...
- Published
- 2021
40. In situ microsynthesis of polyaniline: synthesis–structure–conductivity correlation
- Author
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Julien Bachmann, Vladimir Mikhailovskii, Anna Vasileva, Ignacio Mínguez-Bacho, Ilya E. Kolesnikov, Dmitrii Pankin, and Alina Manshina
- Subjects
In situ ,chemistry.chemical_compound ,Morphology (linguistics) ,Chemical engineering ,Chemistry ,Polyaniline ,Materials Chemistry ,Substrate (chemistry) ,General Chemistry ,Fourier transform infrared spectroscopy ,Conductivity ,Catalysis ,Characterization (materials science) - Abstract
An in situ microsynthesis of polyaniline films directly on a substrate was developed and considered from the viewpoint of conductivity as a key functional property. The microsynthesis was carried out in a reaction volume of 60 μL. The multi-analytical study of polyaniline samples obtained by in situ microsynthesis was performed. The effect of synthesis parameters (reaction time, temperature, and number of synthetic procedures on the same substrate) on the structure, morphology and conductivity was investigated. It was shown that the in situ microsynthesis allows for the formation of polyaniline films in the whole range of synthesis parameters chosen. The correlations between synthetic conditions, structural parameters and conductivity are discussed. The found correlations between FTIR parameters and conductivity can be considered as a promising tool for PANI characterization.
- Published
- 2021
41. The effect of Eu3+ and Gd3+ co-doping on the morphology and luminescence of NaYF4:Eu3+, Gd3+ phosphors
- Author
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Aleksandra A. Vidyakina, Andrey S. Mereshchenko, Ilya I. Tumkin, Vladimir B. Sosnovsky, Mikhail Yu. Skripkin, Viktor G. Nosov, Marina S. Vasileva, Erkki Lähderanta, N. A. Bogachev, and Ilya E. Kolesnikov
- Subjects
Hexagonal prism ,Chemistry ,Doping ,Analytical chemistry ,Phosphor ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Emission intensity ,Catalysis ,0104 chemical sciences ,Ion ,Phase (matter) ,Materials Chemistry ,Hydrothermal synthesis ,0210 nano-technology ,Luminescence - Abstract
β-NaYF4:Eu3+ microparticles co-doped with Gd3+ ions were obtained by hydrothermal synthesis at 180 °C using citric acid as a stabilizing agent. All synthesized materials have a β-NaYF4 crystalline phase, where the unit cell volume increases upon the addition of Eu3+ and Gd3+ ions. The particles have a hexagonal prism shape and a size of 40–714 nm, where Eu3+ and Gd3+ doping results in size reduction. Upon 393 nm excitation, phosphors exhibit distinct emission peaks centered at 591, 615, and 695 nm and a weak band at 650 nm attributed to 5D0–7FJ transitions (J = 1–4). The optimum Eu3+ doping concentration was found to be 30% in the NaYF4 host. Concentration quenching was realized through dipole–dipole interactions. Kinetic measurements showed a gradual decline of the 5D0 lifetime from 6.7 ms to 2.2 ms along with an increase in Eu3+ doping concentration. Co-doping of the small Gd3+ number led to an increase of emission intensity and 5D0 lifetime. The effects of Eu3+ doping and Gd3+ co-doping on radiative and nonradiative decay rates were studied using 4f–4f intensity theory.
- Published
- 2021
42. Luminescent Cu4I4-cubane clusters based on N-methyl-5,10-dihydrophenarsazines
- Author
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Ekaterina M. Zueva, Ilya E. Kolesnikov, Milyausha F. Galimova, Andrey A. Karasik, Rustem R. Musin, Elvira I. Musina, and Alexey B. Dobrynin
- Subjects
Inorganic Chemistry ,chemistry.chemical_compound ,Crystallography ,Materials science ,chemistry ,Elemental analysis ,Cubane ,Aryl ,Nuclear magnetic resonance spectroscopy ,Triplet state ,Absorption (chemistry) ,Mass spectrometry ,Luminescence - Abstract
Two luminescent Cu4I4-cubane tetramers with N-methyl-10-(p-halogenophenyl)-5,10-dihydrophenarsazine ligands were synthesized and characterized by NMR spectroscopy, mass spectrometry, elemental analysis, and single-crystal X-ray diffraction analysis. The UV–Vis absorption and emission properties were studied and rationalized by DFT and time-dependent DFT calculations. The luminescence behavior was found to be rather different from that of recently reported tetranuclear copper iodide cubane clusters based on As,O-analogues – 10-(aryl)phenoxarsines. The crystalline powders of both complexes exhibit the temperature-dependent dual-band emission: the low-energy emission originates from the cluster-centered (3CC) triplet state, whereas the high-energy emission was attributed to the intraligand (3IL) triplet state.
- Published
- 2021
43. Laser-induced switching of the biological activity of phosphonate molecules
- Author
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Ilya E. Kolesnikov, Gerd Leuchs, Anastasia Egorova, D. V. Pankin, Anastasia Khokhlova, Anna Pilip, Vladislav Zigel, Alina Manshina, and Maxim Gureev
- Subjects
chemistry.chemical_compound ,Chemistry ,law ,Materials Chemistry ,Molecule ,Biological activity ,General Chemistry ,Laser ,Phosphonate ,Combinatorial chemistry ,Catalysis ,law.invention - Abstract
The effect of laser activation on butyrylcholinesterase inhibition by a series of phosphorylated arylaminomalonates with different substituents in the phenyl ring is demonstrated.
- Published
- 2021
44. Photophysical properties of new anthracene-ended calix[4]resorcinols
- Author
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Victor V. Syakaev, I. R. Knyazeva, Tatiana P. Gerasimova, Alexander R. Burilov, Ilya E. Kolesnikov, and Sergey A. Katsyuba
- Subjects
Anthracene ,010405 organic chemistry ,Dual emission ,Condensation ,Solid-state ,General Chemistry ,Resorcinol ,010402 general chemistry ,01 natural sciences ,Medicinal chemistry ,0104 chemical sciences ,Benzaldehyde ,chemistry.chemical_compound ,chemistry ,Acetylene ,Click chemistry - Abstract
New calix[4]resorcinols with four anthracene-ended triazolecontaining fragments as rctt- and rccc-diastereoisomers were obtained in two synthetic pathways, namely, by acidcatalyzed condensation of resorcinols with 4-{[1-(anthracen-9-ylmethyl)-1H-[1,2,3]triazol-4-yl]methoxy}benzaldehyde or by the click reaction of 9-(azidomethyl)anthracene with calix[4]resorcinols bearing four terminal acetylene moieties. The compounds obtained demonstrate dual emission in solid state with intensity of low energy band depending on calix[4]resorcinol conformation. The emission in solutions is dominated by anthracene bands, with rccc-isomer showing additional low energy band.
- Published
- 2020
45. New Solid Solutions of Ca3 – 1.5xErx□0.5xB2SiO8: Synthesis, Phase Transition under the Influence of Isomorphic Substitutions and Temperature, Thermal Expansion, and Luminescent Properties of Polymorphs
- Author
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Rimma S. Bubnova, Valentina Yukhno, M. G. Krzhizhanovskaya, Ilya E. Kolesnikov, and A. V. Povolotskii
- Subjects
010302 applied physics ,Materials science ,Borosilicate glass ,010403 inorganic & nuclear chemistry ,Condensed Matter Physics ,01 natural sciences ,Thermal expansion ,0104 chemical sciences ,Crystallography ,symbols.namesake ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,symbols ,Orthorhombic crystal system ,Spectroscopy ,Raman spectroscopy ,Powder diffraction ,Solid solution ,Monoclinic crystal system - Abstract
A number of new solid solutions Ca3 − 1.5xErx□0.5xB2SiO8 (x = 0–0.4) based on borosilicate Ca3B2SiO8 are synthesized: homogeneous solid solutions with х = 0–0.125 are structurally similar to the low-temperature monoclinic polymorphic modification of β-Сa3B2SiO8; and at 0.16 < х < 0.25, to the high-temperature orthorhombic polymorph α-Сa3B2SiO8. High-temperature X-ray powder diffraction and high-temperature Raman spectroscopy (20–1000°C) are used to study the monoclinic-orthorhombic transition of solid solutions through the two-phase region (0.125 < х
- Published
- 2020
46. Construction of efficient dual activating ratiometric YVO4:Nd3+/Eu3+ nanothermometers using co-doped and mixed phosphors
- Author
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Evgenii Yu. Kolesnikov, Ilya E. Kolesnikov, M.A. Kurochkin, Alina Manshina, A.A. Kalinichev, Vasiliy A. Medvedev, Erkki Lähderanta, and Daria V. Mamonova
- Subjects
Materials science ,business.industry ,Nanosensor ,Optoelectronics ,Nanoparticle ,General Materials Science ,Phosphor ,business ,Luminescence ,Co doped - Abstract
The development of new contactless thermal nanosensors based on a ratiometric approach is of significant interest. To overcome the intrinsic limitations of thermally coupled levels, a dual activation strategy was applied. Dual activation was performed using co-doped single nanoparticles and a binary mixture of single-doped nanoparticles. Co-doped and mixed YVO4:Nd3+/Eu3+ nanoparticles were successfully demonstrated as luminescent nanothermometers and their thermometric performance, in terms of thermal sensitivity, temperature resolution and repeatability, was studied and compared.
- Published
- 2020
47. Triple-bridged helical binuclear copper(<scp>i</scp>) complexes: Head-to-head and head-to-tail isomerism and the solid-state luminescence
- Author
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Andrey A. Karasik, Evamarie Hey-Hawkins, Sergey A. Katsyuba, Igor D. Strelnik, Anna G. Strelnik, Daut R. Islamov, Tatiana P. Gerasimova, A.A. Kalinichev, Elvira I. Musina, Oleg G. Sinyashin, Aida I. Samigullina, Ilya E. Kolesnikov, Peter Lönnecke, and Aliia V. Shamsieva
- Subjects
Diffraction ,Materials science ,Head to head ,Solid-state ,chemistry.chemical_element ,Chloride ,Copper ,Inorganic Chemistry ,chemistry.chemical_compound ,Crystallography ,chemistry ,Bromide ,medicine ,Head (vessel) ,Luminescence ,medicine.drug - Abstract
A family of helical dinuclear copper(I) pyridylphospholane complexes [Cu2L3X]X (X = BF4−, Cl− and Br−) was prepared. The family includes the first examples of this type of complex based on copper(I) chloride and copper(I) bromide. The two isomers typical of this class of compounds, namely head-to-head and head-to-tail complexes, were studied in solution by spectroscopic and optical methods, and in the solid state by X-ray diffraction. Furthermore, the solid-state luminescence of the complexes at different temperatures was studied, and the results were interpreted using quantum-chemical calculations. It was shown that the luminescence of the complexes is attributed to the 3(M + X)LCT transitions.
- Published
- 2020
48. Multimode high-sensitivity optical YVO4:Ln3+ nanothermometers (Ln3+ = Eu3+, Dy3+, Sm3+) using charge transfer band features
- Author
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Erkki Lähderanta, E.V. Golyeva, E. Yu. Kolesnikov, Daria V. Mamonova, Ilya E. Kolesnikov, A.A. Kalinichev, and M.A. Kurochkin
- Subjects
Lanthanide ,Multi-mode optical fiber ,Materials science ,business.industry ,Bandwidth (signal processing) ,General Physics and Astronomy ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Thermal ,Optoelectronics ,Physical and Theoretical Chemistry ,0210 nano-technology ,business ,Luminescence ,Nanoscopic scale ,Image resolution ,Excitation - Abstract
Accurate thermal sensing with good spatial resolution is currently required in a variety of scientific and technological areas. Luminescence nanothermometry has shown competitive superiority in contactless temperature sensing, especially at the nanoscale. To broaden the use of such thermometers, development of a novel sensor type with high sensitivity and resolution is highly demanded. Herein, we report single-phase Ln3+-doped YVO4 nanophosphors synthesized using a modified Pechini method as multimode optical thermometers for wide-range temperature probing (299–466 K). The observed temperature-induced red shift of the charge transfer band was utilized to provide thermal sensing. Temperature sensing was based on the luminescence intensity ratio using emission intensities obtained upon charge transfer and direct lanthanide excitation, the spectral position of the charge transfer band and its bandwidth. The suggested probing strategies provided a high relative thermal sensitivity (up to 3.09% K−1) and a precise temperature resolution (up to 0.1 K). The obtained results can be useful for the design of novel contactless luminescence thermometers.
- Published
- 2020
49. Luminescent properties of YVO4:Eu3+ ceramic phosphors according to Li+ content
- Author
-
E.I. Vaishlia, B.V. Chernovets, Ilya E. Kolesnikov, and E.V. Golyeva
- Subjects
010302 applied physics ,Materials science ,Kinetics ,Doping ,Analytical chemistry ,Phosphor ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Grain size ,Matrix (chemical analysis) ,Wavelength ,visual_art ,0103 physical sciences ,visual_art.visual_art_medium ,Ceramic ,0210 nano-technology ,Luminescence - Abstract
YVO4:Eu3+ ceramic is an excellent crystalline phosphor, which emits at wavelength λ = 580–740 nm. The study of ceramics with Li+ doping is interesting in terms of improving the optical and strength characteristics. Obtaining Li-doped YVO4:Eu3+ was carried out by hot uniaxial pressing. Qualitative analysis of the samples revealed an increase in the grain size of the structure from 5 to 7 µm. The invariance of the phase composition was revealed by x-ray phase analysis. Intensity increase of 1.8 times was observed for YVO4:Eu3+ with Li+ compared to the sample without Li-ion by luminescence analysis. The luminescence kinetics of YVO4:Eu3+ with and without Li+ remains unchanged. The strength characteristics are increased by adding Li+ to the host matrix.
- Published
- 2020
50. Luminescence and energy transfer mechanisms in photo-thermo-refractive glasses co-doped with silver molecular clusters and Eu3+
- Author
-
Yevgeniy Sgibnev, Leonid Yu. Mironov, Nikolay Nikonorov, Ilya E. Kolesnikov, and Dmitriy V. Marasanov
- Subjects
Materials science ,Quenching (fluorescence) ,Doping ,General Physics and Astronomy ,02 engineering and technology ,Nanosecond ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Photochemistry ,01 natural sciences ,Fluorescence ,0104 chemical sciences ,Microsecond ,Cluster (physics) ,Physical and Theoretical Chemistry ,0210 nano-technology ,Phosphorescence ,Luminescence - Abstract
Silver molecular clusters were synthesized in photo-thermo-refractive glasses using the Na+–Ag+ ion exchange technique followed by heat treatment. Comprehensive study of cluster emission reveals the presence of spectrally separated fluorescence and phosphorescence with nanosecond and microsecond lifetime. Co-doping of glasses with Eu3+ was shown to results in quenching of cluster luminescence caused by energy transfer. The monitoring of silver cluster luminescence quantum yield and lifetime in the presence of Eu3+ indicates the presence of two different mechanisms of energy transfer. The first one affects the decay kinetics of cluster fluorescence and manifests at long distances, while the second one leads to static quenching of cluster emission at shorter distances and becomes prominent at higher doping Eu3+ concentration.
- Published
- 2020
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