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34 results on '"Nikoloudakis, Emmanouil"'

4. Antimicrobial Potency of Fmoc-Phe-Phe Dipeptide Hydrogels with Encapsulated Porphyrin Chromophores Is a Promising Alternative in Antimicrobial Resistance

Author

Apostolidou, Chrysanthi Pinelopi, primary, Kokotidou, Chrysoula, additional, Platania, Varvara, additional, Nikolaou, Vasilis, additional, Landrou, Georgios, additional, Nikoloudakis, Emmanouil, additional, Charalambidis, Georgios, additional, Chatzinikolaidou, Maria, additional, Coutsolelos, Athanassios G., additional, and Mitraki, Anna, additional

Published
2024
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6. Highly efficient light-driven hydrogen evolution utilizing porphyrin-based nanoparticles.

Author

Nikolaou, Vasilis, Agapaki, Eleni, Nikoloudakis, Emmanouil, Achilleos, Katerina, Ladomenou, Kalliopi, Charalambidis, Georgios, Triantafyllou, Evitina, and Coutsolelos, Athanassios G.

Subjects
HYDROGEN evolution reactions, TITANIUM dioxide nanoparticles, NANOPARTICLES, HYDROGEN, METALLOPORPHYRINS
Abstract

We developed dye-sensitized photocatalytic systems (DSPs) by utilizing porphyrins as a photosensitizer (PS) or as a photosensitizer–catalyst (PS/CAT) upon their chemisorption onto platinum-doped titanium dioxide nanoparticles (Pt-TiO2 NPs). The DSPs coated with Pt-Tc3CP (PS/CAT entity) exhibited a record-high stability (25 500 TONs) and H2 evolution activity (707 mmol g−1 h−1) compared to similar DSPs in the literature. [ABSTRACT FROM AUTHOR]

Published
2023
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7. C-NGINE: A Contextual Navigation Guide for Indoor Environments

Author

Kritsotakis, Manolis, Michou, Maria, Nikoloudakis, Emmanouil, Bikakis, Antonis, Patkos, Theodore, Antoniou, Grigoris, Plexousakis, Dimitris, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Aarts, Emile, editor, Crowley, James L., editor, de Ruyter, Boris, editor, Gerhäuser, Heinz, editor, Pflaum, Alexander, editor, Schmidt, Janina, editor, and Wichert, Reiner, editor

Published
2008
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8. Functionalized BODIPYs as Tailor‐Made and Universal Interlayers for Efficient and Stable Organic and Perovskite Solar Cells

Author

Soultati, Anastasia, primary, Nunzi, Francesca, additional, Fakharuddin, Azhar, additional, Verykios, Apostolis, additional, Armadorou, Konstantina K., additional, Tountas, Marinos, additional, Panagiotakis, Stylianos, additional, Polydorou, Ermioni, additional, Charisiadis, Asterios, additional, Nikolaou, Vasilis, additional, Papadakis, Michael, additional, Charalambidis, Georgios, additional, Nikoloudakis, Emmanouil, additional, Yannakopoulou, Konstantina, additional, Bao, Xichang, additional, Yang, Chunming, additional, Dunbar, Alan D. F., additional, Kymakis, Emmanuel, additional, Palilis, Leonidas C., additional, Mohd Yusoff, Abd Rashid Bin, additional, Argitis, Panagiotis, additional, Coutsolelos, Athanassios G., additional, De Angelis, Filippo, additional, Nazeeruddin, Mohammad Khaja, additional, and Vasilopoulou, Maria, additional

Published
2022
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9. Design and Synthesis of Porphyrin–Nitrilotriacetic Acid Dyads with Potential Applications in Peptide Labeling through Metallochelate Coupling

Author

Glymenaki, Eleni, primary, Kandyli, Maria, additional, Apostolidou, Chrysanthi Pinelopi, additional, Kokotidou, Chrysoula, additional, Charalambidis, Georgios, additional, Nikoloudakis, Emmanouil, additional, Panagiotakis, Stylianos, additional, Koutserinaki, Eleftheria, additional, Klontza, Vithleem, additional, Michail, Panagiota, additional, Charisiadis, Asterios, additional, Yannakopoulou, Konstantina, additional, Mitraki, Anna, additional, and Coutsolelos, Athanassios G., additional

Published
2022
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12. Defect passivation in perovskite solar cells using an amino-functionalized BODIPY fluorophore

Author

Soultati, Anastasia, primary, Tountas, Marinos, additional, Fakharuddin, Azhar, additional, Skoulikidou, Maria-Christina, additional, Verykios, Apostolis, additional, Armadorou, Konstantina-Kalliopi, additional, Tzoganakis, Nikolaos, additional, Vidali, Veroniki P., additional, Sakellis, Ilias, additional, Koralli, Panagiota, additional, Chochos, Christos L., additional, Petsalakis, Ioannis, additional, Nikoloudakis, Emmanouil, additional, Palilis, Leonidas C., additional, Filippatos, Petros-Panagis, additional, Argitis, Panagiotis, additional, Davazoglou, Dimitris, additional, Mohd Yusoff, Abd. Rashid bin, additional, Kymakis, Emmanuel, additional, Coutsolelos, Athanassios G., additional, and Vasilopoulou, Maria, additional

Published
2022
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13. Dye-Sensitized Photoelectrosynthesis Cells for Benzyl Alcohol Oxidation Using a Zinc Porphyrin Sensitizer and TEMPO Catalyst

Author

Nikoloudakis, Emmanouil, primary, Pati, Palas Baran, additional, Charalambidis, Georgios, additional, Budkina, Darya S., additional, Diring, Stéphane, additional, Planchat, Aurélien, additional, Jacquemin, Denis, additional, Vauthey, Eric, additional, Coutsolelos, Athanassios G., additional, and Odobel, Fabrice, additional

Published
2021
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16. Porphyrins and phthalocyanines as biomimetic tools for photocatalytic H2 production and CO2 reduction.

Author

Nikoloudakis, Emmanouil, López-Duarte, Ismael, Charalambidis, Georgios, Ladomenou, Kalliopi, Ince, Mine, and Coutsolelos, Athanassios G.

Subjects
*PORPHYRINS, *PHTHALOCYANINES, *PHOTOELECTROCHEMICAL cells, *PHTHALOCYANINE derivatives, *ENERGY consumption, *ALTERNATIVE fuels, *METAL phthalocyanines
Abstract

The increasing energy demand and environmental issues caused by the over-exploitation of fossil fuels render the need for renewable, clean, and environmentally benign energy sources unquestionably urgent. The zero-emission energy carrier, H2 is an ideal alternative to carbon-based fuels especially when it is generated photocatalytically from water. Additionally, the photocatalytic conversion of CO2 into chemical fuels can reduce the CO2 emissions and have a positive environmental and economic impact. Inspired by natural photosynthesis, plenty of artificial photocatalytic schemes based on porphyrinoids have been investigated. This review covers the recent advances in photocatalytic H2 production and CO2 reduction systems containing porphyrin or phthalocyanine derivatives. The unique properties of porphyrinoids enable their utilization both as chromophores and as catalysts. The homogeneous photocatalytic systems are initially described, presenting the various approaches for the improvement of photosensitizing activity and the enhancement of catalytic performance at the molecular level. On the other hand, for the development of the heterogeneous systems, numerous methods were employed such as self-assembled supramolecular porphyrinoid nanostructures, construction of organic frameworks, combination with 2D materials and adsorption onto semiconductors. The dye sensitization on semiconductors opened the way for molecular-based dye-sensitized photoelectrochemical cells (DSPECs) devices based on porphyrins and phthalocyanines. The research in photocatalytic systems as discussed herein remains challenging since there are still many limitations making them unfeasible to be used at a large scale application before finding a large-scale application. [ABSTRACT FROM AUTHOR]

Published
2022
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19. Controlling Solar Hydrogen Production by Organizing Porphyrins

Author

Nikolaou, Vasilis, primary, Charalambidis, Georgios, additional, Ladomenou, Kalliopi, additional, Nikoloudakis, Emmanouil, additional, Drivas, Charalambos, additional, Vamvasakis, Ioannis, additional, Panagiotakis, Stylianos, additional, Landrou, Georgios, additional, Agapaki, Eleni, additional, Stangel, Christina, additional, Henkel, Christian, additional, Joseph, Jan, additional, Armatas, Gerasimos, additional, Vasilopoulou, Maria, additional, Kennou, Stella, additional, Guldi, Dirk M., additional, and Coutsolelos, Athanassios G., additional

Published
2020
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26. Controlling Solar Hydrogen Production by Organizing Porphyrins.

Author

Nikolaou, Vasilis, Charalambidis, Georgios, Ladomenou, Kalliopi, Nikoloudakis, Emmanouil, Drivas, Charalambos, Vamvasakis, Ioannis, Panagiotakis, Stylianos, Landrou, Georgios, Agapaki, Eleni, Stangel, Christina, Henkel, Christian, Joseph, Jan, Armatas, Gerasimos, Vasilopoulou, Maria, Kennou, Stella, Guldi, Dirk M., and Coutsolelos, Athanassios G.

Subjects
HYDROGEN production, PORPHYRINS, ELECTRON transport, PLATINUM nanoparticles, TURNOVER frequency (Catalysis), CATALYTIC activity, PHOTOCATALYSTS
Abstract

In this study, a highly efficient photocatalytic H2 production system is developed by employing porphyrins as photocatalysts. Palladium and platinum tetracarboxyporphyrins (PdTCP and PtTCP) are adsorbed or coadsorbed onto TiO2 nanoparticles (NPs), which act as the electron transport medium and as a scaffold that promotes the self‐organization of the porphyrinoids. The self‐organization of PdTCP and PtTCP, forming H‐ and J‐aggregates, respectively, is the key element for H2 evolution, as in the absence of TiO2 NPs no catalytic activity is detected. Notably, J‐aggregated PtTCPs are more efficient for H2 production than H‐aggregated PdTCPs. In this approach, a single porphyrin, which self‐organizes onto TiO2 NPs, acts as the light harvester and simultaneously as the catalyst, whereas TiO2 serves as the electron transport medium. Importantly, the concurrent adsorption of PdTCP and PtTCP onto TiO2 NPs results in the most efficient catalytic system, giving a turnover number of 22,733 and 30.2 mmol(H2) g(cat)−1. [ABSTRACT FROM AUTHOR]

Published
2021
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28. Self-assembly of (boron-dipyrromethane)-diphenylalanine conjugates forming chiral supramolecular materials

Author

Karikis, Kostas, primary, Butkiewicz, Aleksandra, additional, Folias, Fotios, additional, Charalambidis, Georgios, additional, Kokotidou, Chrysoula, additional, Charisiadis, Asterios, additional, Nikolaou, Vasilis, additional, Nikoloudakis, Emmanouil, additional, Frelek, Jadwiga, additional, Mitraki, Anna, additional, and Coutsolelos, Athanassios G., additional

Published
2018
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29. Self-assembly study of nanometric spheres from polyoxometalate-phenylalanine hybrids, an experimental and theoretical approach

Author

Nikoloudakis, Emmanouil, primary, Karikis, Kostas, additional, Laurans, Maxime, additional, Kokotidou, Chrysoula, additional, Solé-Daura, Albert, additional, Carbó, Jorge J., additional, Charisiadis, Asterios, additional, Charalambidis, Georgios, additional, Izzet, Guillaume, additional, Mitraki, Anna, additional, Douvas, Antonios M., additional, Poblet, Josep M., additional, Proust, Anna, additional, and Coutsolelos, Athanassios G., additional

Published
2018
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33. Porphyrins and phthalocyanines as biomimetic tools for photocatalytic H 2 production and CO 2 reduction.

Author

Nikoloudakis E, López-Duarte I, Charalambidis G, Ladomenou K, Ince M, and Coutsolelos AG

Subjects
Biomimetics, Carbon Dioxide chemistry, Isoindoles, Photosynthesis, Porphyrins chemistry
Abstract

The increasing energy demand and environmental issues caused by the over-exploitation of fossil fuels render the need for renewable, clean, and environmentally benign energy sources unquestionably urgent. The zero-emission energy carrier, H 2 is an ideal alternative to carbon-based fuels especially when it is generated photocatalytically from water. Additionally, the photocatalytic conversion of CO 2 into chemical fuels can reduce the CO 2 emissions and have a positive environmental and economic impact. Inspired by natural photosynthesis, plenty of artificial photocatalytic schemes based on porphyrinoids have been investigated. This review covers the recent advances in photocatalytic H 2 production and CO 2 reduction systems containing porphyrin or phthalocyanine derivatives. The unique properties of porphyrinoids enable their utilization both as chromophores and as catalysts. The homogeneous photocatalytic systems are initially described, presenting the various approaches for the improvement of photosensitizing activity and the enhancement of catalytic performance at the molecular level. On the other hand, for the development of the heterogeneous systems, numerous methods were employed such as self-assembled supramolecular porphyrinoid nanostructures, construction of organic frameworks, combination with 2D materials and adsorption onto semiconductors. The dye sensitization on semiconductors opened the way for molecular-based dye-sensitized photoelectrochemical cells (DSPECs) devices based on porphyrins and phthalocyanines. The research in photocatalytic systems as discussed herein remains challenging since there are still many limitations making them unfeasible to be used at a large scale application before finding a large-scale application.

Published
2022
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34. Supramolecular Nanodrugs Constructed by Self-Assembly of Peptide Nucleic Acid-Photosensitizer Conjugates for Photodynamic Therapy.

Author

Chang R, Nikoloudakis E, Zou Q, Mitraki A, Coutsolelos AG, and Yan X

Abstract

Two hybrid materials were designed by conjugating peptide nucleic acids (PNAs) to porphyrin or boron-dipyrromethene, generating PNA-porphyrin (PNA-TPP) and PNA-BODIPY (PNA-BDP) conjugates, respectively. Because of the combination of the supramolecular characteristics of PNAs and photosensitizers, the two hybrid conjugates readily self-assemble in aqueous solutions and produce well-defined nanoparticles with uniform particle sizes. The resulting two kinds of nanoparticles show good stability in biological solutions and upon dilution. Importantly, the nanoparticles can efficiently interact with cancer cells and the internalized nanoparticles are mainly distributed in the cytoplasm without discernible cytotoxicity in the dark, enabling them to be applied as photodynamic nanoagents for selective killing cells. Hence, self-assembly of PNA-photosensitizer conjugates may hold promise for advancing the rational design and construction of photodynamic nanoagents for cancer therapy.

Published
2020
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