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Molecular Characteristics of Water-Insoluble Tin-Porphyrins for Designing the One-Photon-Induced Two-Electron Oxidation of Water in Artificial Photosynthesis
Faced with the new stage of water oxidation by molecular catalysts (MCs) in artificial photosynthesis to overcome the bottle neck issue, the “Photon-flux density problem of sunlight,” a two-electron oxidation process forming H(2)O(2) in place of the conventional four-electron oxidation evolving O(2)...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9963784/ https://www.ncbi.nlm.nih.gov/pubmed/36838871 http://dx.doi.org/10.3390/molecules28041882 |
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author | Thomas, Arun Ohsaki, Yutaka Nakazato, Ryosuke Kuttassery, Fazalurahman Mathew, Siby Remello, Sebastian Nybin Tachibana, Hiroshi Inoue, Haruo |
author_facet | Thomas, Arun Ohsaki, Yutaka Nakazato, Ryosuke Kuttassery, Fazalurahman Mathew, Siby Remello, Sebastian Nybin Tachibana, Hiroshi Inoue, Haruo |
author_sort | Thomas, Arun |
collection | PubMed |
description | Faced with the new stage of water oxidation by molecular catalysts (MCs) in artificial photosynthesis to overcome the bottle neck issue, the “Photon-flux density problem of sunlight,” a two-electron oxidation process forming H(2)O(2) in place of the conventional four-electron oxidation evolving O(2) has attracted much attention. The molecular characteristics of tin(IV)-tetrapyridylporphyrin (SnTPyP), as one of the most promising MCs for the two-electron water oxidation, has been studied in detail. The protolytic equilibria among nine species of SnTPyP, with eight pK(a) values on the axial ligands’ water molecules and peripheral pyridyl nitrogen atoms in both the ground and excited states, have been clarified through the measurements of UV-vis, fluorescence, (1)H NMR, and dynamic fluorescence decay behaviour. The oxidation potentials in the Pourbaix diagram and spin densities by DFT calculation of the one-electron oxidized form of each nine species have predicted that the fully deprotonated species ([SnTPyP(O(−))(2)](2−)) and the singly deprotonated one ([SnTPyP(OH)(O(−))](−)) serve as the most favourable MCs for visible light-induced two-electron water oxidation when they are adsorbed on TiO(2) for H(2) formation or SnO(2) for Z-scheme CO(2) reduction in the molecular catalyst sensitized system of artificial photosynthesis. |
format | Online Article Text |
id | pubmed-9963784 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-99637842023-02-26 Molecular Characteristics of Water-Insoluble Tin-Porphyrins for Designing the One-Photon-Induced Two-Electron Oxidation of Water in Artificial Photosynthesis Thomas, Arun Ohsaki, Yutaka Nakazato, Ryosuke Kuttassery, Fazalurahman Mathew, Siby Remello, Sebastian Nybin Tachibana, Hiroshi Inoue, Haruo Molecules Article Faced with the new stage of water oxidation by molecular catalysts (MCs) in artificial photosynthesis to overcome the bottle neck issue, the “Photon-flux density problem of sunlight,” a two-electron oxidation process forming H(2)O(2) in place of the conventional four-electron oxidation evolving O(2) has attracted much attention. The molecular characteristics of tin(IV)-tetrapyridylporphyrin (SnTPyP), as one of the most promising MCs for the two-electron water oxidation, has been studied in detail. The protolytic equilibria among nine species of SnTPyP, with eight pK(a) values on the axial ligands’ water molecules and peripheral pyridyl nitrogen atoms in both the ground and excited states, have been clarified through the measurements of UV-vis, fluorescence, (1)H NMR, and dynamic fluorescence decay behaviour. The oxidation potentials in the Pourbaix diagram and spin densities by DFT calculation of the one-electron oxidized form of each nine species have predicted that the fully deprotonated species ([SnTPyP(O(−))(2)](2−)) and the singly deprotonated one ([SnTPyP(OH)(O(−))](−)) serve as the most favourable MCs for visible light-induced two-electron water oxidation when they are adsorbed on TiO(2) for H(2) formation or SnO(2) for Z-scheme CO(2) reduction in the molecular catalyst sensitized system of artificial photosynthesis. MDPI 2023-02-16 /pmc/articles/PMC9963784/ /pubmed/36838871 http://dx.doi.org/10.3390/molecules28041882 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Thomas, Arun Ohsaki, Yutaka Nakazato, Ryosuke Kuttassery, Fazalurahman Mathew, Siby Remello, Sebastian Nybin Tachibana, Hiroshi Inoue, Haruo Molecular Characteristics of Water-Insoluble Tin-Porphyrins for Designing the One-Photon-Induced Two-Electron Oxidation of Water in Artificial Photosynthesis |
title | Molecular Characteristics of Water-Insoluble Tin-Porphyrins for Designing the One-Photon-Induced Two-Electron Oxidation of Water in Artificial Photosynthesis |
title_full | Molecular Characteristics of Water-Insoluble Tin-Porphyrins for Designing the One-Photon-Induced Two-Electron Oxidation of Water in Artificial Photosynthesis |
title_fullStr | Molecular Characteristics of Water-Insoluble Tin-Porphyrins for Designing the One-Photon-Induced Two-Electron Oxidation of Water in Artificial Photosynthesis |
title_full_unstemmed | Molecular Characteristics of Water-Insoluble Tin-Porphyrins for Designing the One-Photon-Induced Two-Electron Oxidation of Water in Artificial Photosynthesis |
title_short | Molecular Characteristics of Water-Insoluble Tin-Porphyrins for Designing the One-Photon-Induced Two-Electron Oxidation of Water in Artificial Photosynthesis |
title_sort | molecular characteristics of water-insoluble tin-porphyrins for designing the one-photon-induced two-electron oxidation of water in artificial photosynthesis |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9963784/ https://www.ncbi.nlm.nih.gov/pubmed/36838871 http://dx.doi.org/10.3390/molecules28041882 |
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