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Design and photophysical studies of iridium(iii)–cobalt(iii) dyads and their application for dihydrogen photo-evolution

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Abstract

We report several new dyads constituted of cationic iridium(III) photosensitizers and cobalt(III) catalyst connected via free pendant pyridine on the photosensitizers. These dyads were studied by X-ray crystallography, electrochemistry, absorption and emission spectroscopy as well as theoretical calculations and were shown to efficiently produce H2 under visible light irradiation. In every case, the dyad outperformed the equivalent system without a pendant pyridine. The dependence between irradiation wavelength and photocatalytic performances was also studied, with H2 being evolved with turn-over numbers up to 295, 251, 188 and 78 molH2 molPS−1 under blue, green, yellow and red light, respectively.

Graphical abstract: Design and photophysical studies of iridium(iii)–cobalt(iii) dyads and their application for dihydrogen photo-evolution

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Publication details

The article was received on 13 May 2019, accepted on 16 Jul 2019 and first published on 25 Jul 2019


Article type: Paper
DOI: 10.1039/C9DT01989H
Dalton Trans., 2019, Advance Article

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    Design and photophysical studies of iridium(III)–cobalt(III) dyads and their application for dihydrogen photo-evolution

    C. Lentz, O. Schott, T. Auvray, G. S. Hanan and B. Elias, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT01989H

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