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This review highlights the advancement of molecular triplet donors showing singlet-to-triplet (S–T) absorption and their utilization for triplet-triplet annihilation-based photon upconversion (TTA-...

Cellular engraftment onto an engineered scaffold is of significant importance for successful implantation. Herein, we propose the use of three-dimensional (3D) silica nonwoven fabrics (SNFs, Cellbe...

We newly designed and synthesized two kinds of 1,3,5-triazine-cored star-shaped (D-π)3-A molecules with 1-aza 15-crown 5-ether receptors (TSM-ACE) and dipicolylamino receptors (TSM-DPA), which poss...

Novel perfluoroalkyl gelators without hydrogen bonds–bis(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctyl) isophthalate (1m), bis(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctyl) terephthalate...

Supramolecular fluorescent gelators containing a tris(β-diketonato) complex are synthesized by using gelation-driving chelates, and their gelation abilities are studied with 15 solvents. Thin-layer...

Supramolecular fluorescent gelators containing a tris(beta-diketonato) complex are synthesized by using gelation-driving chelates, and their gelation abilities are studied with 15 solvents. Thin-layer films are prepared on quartz plates from the solutions and they are studied as chemosensors for amines. Fluorescence-quenching of the thin-layer films upon exposure to saturated primary and secondary amine vapors is monitored to evaluate the abilities of the chemosensors to detect amines. The morphologies of the thin-layer films are observed by transmission electron microscopy (TEM) and discussed in relation to their fluorescence-quenching. The fluorescence-quenching efficiencies upon exposure to saturated primary and secondary amines depend on the basicity and bulkiness of the amines rather than the vapor pressure. The fluorescence-quenching is caused by decomposition of a complex through nucleophilic addition of primary or secondary amines to its carbonyl group. The detection of tertiary amines is performed by monitoring the fluorescence emission from the thin-layer films, which are composed of a ligand and EuCl3. The emergence of fluorescence originates from the formation of fluorescent Eu3+-containing gelator, in which dehydrochloric acid by tertiary amines is a trigger for the complexation., Article, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN.91(4):538-547(2018)

A new triple-electrode system was developed for the simultaneous determination of l-lactate and d-glucose by using track-etched microporous membrane electrodes, which enabled efficient electrolysis as electroactive substances passed through the electrode. The proposed biosensor was fabricated by alternate stacking of the electrodes and immobilized enzyme reactors along the flow direction of the sample solution. When the sample solution containing l-lactate and d-glucose flowed into the proposed biosensor, hydrogen peroxide was produced by each enzymatic reaction and detected individually by anodization at each detector-electrode positioned downstream of each enzyme reactor. The interfering substances, such as l-ascorbic acid and uric acid, were electrolyzed completely at the pre-reactor electrode that was positioned upstream of the enzyme reactors. As a result, the simultaneous detection of l-lactate and d-glucose was achieved with no other catalytic material such as peroxidase or an electron mediator in ...

The temperature (T) dependences of the emission spectra and lifetimes of octahedral hexanuclear molybdenum(II) ([{Mo6Cl8}Cl6]2− = [1]2−), rhenium(III) ([{Re6S8}Cl6]4− = [2]4−), and tungsten(II) clusters ([{W6Cl8}Cl6]2− = [3]2−) in crystalline or poly(methyl methacrylate) (PMMA) phases were studied. The emission spectrum of the cluster showed a lower-energy shift upon heating from 3 to 70 K, while that shifted gradually to higher-energy above 70 K. The emission spectral shifts of the cluster upon T-elevation accompanied sharp ( 50 K) in the emission lifetime. Such T-dependent emission characteristics, commonly observed for these three cluster complexes, were analyzed by assuming the contribution of the emissions from the excited triplet state spin-sublevels. The large T dependences of the emission lifetimes and spectra of the hexanuclear Mo(II), Re(III), and W(II) clusters can be understood by a single context of the contributions of the emissions from the excited triplet stat...

To understand Rh(III) adsorption behaviors of styrene–divinylbenzene copolymer functionalized with N,N,N-trimethylglycine (AMP03), we measured the distribution coefficients (Kd) of Rh(III) and the ...

Mixture of octa(3-aminopropyl) polyhedral oligomeric silsesquioxane (POSS-NH2) and tetrachloroauric(III) acid under basic condition spontaneously produced gold nanoparticles (AuNPs). The amino grou...

Bisoxazoline (BOX)-catalyzed asymmetric nucleophilic addition of diethyl zinc to fluorinated alkyl ketones successfully afforded enantioenriched fluorinated alkyl tertiary alcohols. The effect of t...

Novel lanthanoid(III) (Ln(III)) complexes with N,N,N′,N′-tetraethyldiglycolamide (TEDGA), [Ln(TEDGA)3](NO3)3·4H2O (Ln = Tb, Dy, Ho, Er, Tm, Yb, and Lu), have been synthesized and characterized crys...

Morphological phases of DMPC/DHPC mixtures have already been investigated by using SANS, SAXS, NMR, and fluorescence-based techniques, as well as cryo-TEM, in which the manner of temperature is cha...

Novel lanthanoid(III) (Ln(III)) complexes with N,N,N′,N′-tetraethyldiglycolamide (TEDGA), [Ln(TEDGA)3][Ln(NO3)6] (Ln = La, Ce, Pr, Nd, Sm, Eu, and Gd), have been synthesized and characterized cryst...

A trisaloph ligand L1, in which the three saloph units are macrocyclically incorporated, is a versatile multidentate ligand that maintains the multimetal complex. Structural modulation of the trisa...

The low-frequency spectra of normal anthracene and anthracene-d10 in the solid state were measured by a high-resolution terahertz spectrometer. We observed the isotope shift of the vibrational freq...

Stereoselective synthesis of the C1–C16 fragment of the antifungal marine polyether macrolide goniodomin A is described. A Stille-type coupling of organostannanes and thioesters was exploited as th...

We describe a simple method for controllably depositing Pt–Ru alloy nanoparticles on carbon surfaces that is mediated by Pb or Cu adlayers undergoing underpotential deposition and stripping during ...

Two kinds of diarylperfluorocyclopentenes having 5-phenyl-2-propyl-3-thienyl and 2-isobutyl-5-phenyl-3-thienyl group as the aryl groups were newly synthesized, and the thermal stability of their cl...

Many genetic disorders have recently been identified as a major cause of diseases and the regulation of gene expression has been proposed as an attractive therapeutic strategy. Synthetic oligodeoxy...

We present here an in situ scanning tunneling microscopy (STM) study of potential-induced reactions of oxo-centered acetato-bridged triruthenium clusters on Au(111) under electrochemical conditions...

Neutral zinc porphyrin containing flexible alkyl linker, 5-[4-(5-hydroxypentyloxy)phenyl]-10,15,20-tri-p-tolylporphyrinatozinc, was attached to the 5′ ends of 20- and 30-bp oligodeoxynucleotides (O...

Self-assembly of polythiophenes with –C≡CR (R = alkyl, phenyl, etc.) side chains has been investigated. Seven new polymers consisting of head-to-head and tail-to-tail 2,2′-bithiophenes with –C≡CR s...

Chlorophyll and bacteriochlorophyll derivatives possessing a trifluoroacetyl group at the 3-position were synthesized as new colorimetric sensors for amine detection. α-Amino alcohol formation of t...

Photoinduced electron transfer between fullerenes (C 60 and C 70 ) and three phenothiazine oligomers ((PTZ) n s; n = 1, 2, and 3) was studied by using a transient absorption method in the visible and near-IR regions. Electron transfer took place from (PTZ) n s to the triplet states of fullerenes ( 3 C 60 * and 3 C 70 *), giving the radical anions of fullerenes (C 60 ·- and C 70 ·-) and the radical cations of (PTZ) n s, which exhibited strong absorptions in visible and near-IR region for n = 2 and 3. From these absorptions, positions of the radical cation in (PTZ) 2 ·+ and (PTZ) 3 ·+ generated by electron donation were also determined. Rate constants and quantum efficiencies of the electron transfer were found to be quite high, because of the strong electron-donating abilities of (PTZ) n s; the order of the rates of electron transfer to 3 C 60 * and 3 C 70 * is (PTZ) 1 > (PTZ) 2 = (PTZ) 3 , which corresponds to the decreasing order of their oxidation potentials. Upon addition of hexylviologen dication (HV 2+ ), an electron-mediating process occurred from C 60 ·- to HV 2+ , yielding the viologen radical cation (HV ·+ ). In the presence of a sacrificial donor, HV ·+ persisted for a long time.

A combination system consisting of a H2 production photocatalyst, Pt/SrTiO3:Rh, and an O2 production photocatalyst, BiVO4 or WO3, decomposed water into H2 and O2 under visible light irradiation in ...

A series of metal ion-containing ionic liquids [Bmim]2[MCl4] (M = Sn, Cu, Ni, Mn, Fe, Co, Zn, and Pt; [Bmim] = 1-butyl-3-methylimidazolium) and [Bmim]2[ZrCl6] were synthesized and their single-crys...

Carbonyl-coordinated ruthenium(II) and osmium(II) porphyrin dimers bridged with aza ligands, [(M(por)-(CO)} 2 ](BL), (M = Ru II , Os II ; por = ttp (5,10,15,20-tetra-p-tolylporphyrinato dianion), oep (2,3,7,8,12,13,17,18-octa-ethylporphyrinato dianion); BL = pz (pyrazine), bpy (4,4'-bipyridine), dabco (1,4-diazabicyclo[2,2,2]octane)), were prepared and characterized, and their structures were determined by using single-crystal X-ray crystallography. The metal-metal distances of the pz-, bpy-, and dabco-bridged dimers in [{M(por)(CO)} 2 (BL)] were about 7.1-7.3, 11.5, and 7.3-7.4 A, respectively. From electrochemical measurements, the first oxidation waves of the ruthenium and osmium porphyrin dimers with the pz and dabco, except the Ru-oep systems, were split, although the first oxidation in the Ru complexes occurs at the porphyrin rings and in the Os complexes occurs at the metal centers. The extent of the potential splits at the first oxidation processes, which reflects magnitude of the intramolecular redox interactions, was in the orders: ttp > oep and Os (metal oxidation) > Ru (ring oxidation), and dabco≥ pz≥ bpy.

Neutron diffraction measurements were carried out on 14N/15N isotopically substituted aqueous 5 mol % sodium L-hydrogenglutamate solutions in D2O in order to obtain direct information concerning th...

Crowded triarylphosphines carrying a nitroxide radical were synthesized to investigate intramolecular interaction between the crowded triarylphosphine redox centers and a neutral radical. A crowded...

5-(3-Pyridyl)porphyrinatoruthenium(II) tetramers, [(Ru(3-PyT 3 porph )(CO)}4] (1), [{Ru (3-PytB3porph)(CO)}4] (2), [{Ru(3-PyHex3porph)(CO))4] (3), and [(Ru (3-PytB3porph)(py)}4] (4) were prepared. The structures of the isolated tetramers were determined to be rhombic shaped with two chemically nonequivalent porphyrinatoruthenium(II) subunits by 1 HNMR, IR, and ESI-MS measurements. The tetramers were stable in benzene at 70 °C. However, the tetramers reacted with a large excess of pyridine to give two geometrical isomers of porphyrinatoruthenium(II) in dichloromethane at room temperature as observed by 1 H NMR spectrometry. UV-vis spectra of the tetramers showed splitting or broadening of the Soret band due to excitonic interactions. Stepwise oxidations of the porphyrin rings or the ruthenium ions in the cyclic tetramer skeleton were observed in cyclic voltammograms.