Photochemical production of molecular hydrogen in the presence of substituted acridine salts
- Autores: Dolganov A.V1, Klimaeva L.A1, Okina E.V1, Knyazev A.V2
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Afiliações:
- N.P. Ogarev National Research Mordovia State University
- Lobachevsky State University
- Edição: Volume 93, Nº 1 (2023)
- Páginas: 77-83
- Seção: Articles
- URL: https://kazanmedjournal.ru/0044-460X/article/view/667124
- DOI: https://doi.org/10.31857/S0044460X23010092
- EDN: https://elibrary.ru/OZLORD
- ID: 667124
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Resumo
The photocatalytic properties of new representatives of the family of metal-free catalysts, 10-hydro-9-phenylacridine, 10-methyl-9-phenylacridinium chloride, and 10-phenyl-9-phenylacridinium chloride, were studied with respect to the reaction of molecular hydrogen generation in the presence of acids of different strength (HClO4, CH3SO3H, and CF3COOH) and reducing agents ([Bu4N]Cl, [Bu4N]Br, and [Bu4N]I). It was found that the strength of acids (p K a) and the nature of the reducing agent ( E 0) significantly affect the efficiency, i.e. turnover frequency (TOF), of the process under study. The amount of formed molecular hydrogen reaches its maximum in the case of the combination HClO4 and [Bu4N]I, characterized by minimal p K a and E0 values, respectively. The influence of the nature of substituents at the nitrogen atom in 9-phenylacridine on the efficiency of the molecular hydrogen production was analyzed. It was shown that the limiting stage of the process is the protonation of the formed radical.
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Sobre autores
A. Dolganov
N.P. Ogarev National Research Mordovia State University
Email: dolganov_sasha@mail.ru
L. Klimaeva
N.P. Ogarev National Research Mordovia State University
E. Okina
N.P. Ogarev National Research Mordovia State University
A. Knyazev
Lobachevsky State University
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