par De Kreijger, Simon;Schott, Olivier;Troian Gautier, Ludovic 
;Cauet, Emilie ;Hanan, Garry G.S.;Elias, Benjamin
Référence Inorganic chemistry, 61, 13, page (5245-5254)
Publication Publié, 2022-04
;Cauet, Emilie ;Hanan, Garry G.S.;Elias, Benjamin Référence Inorganic chemistry, 61, 13, page (5245-5254)
Publication Publié, 2022-04
Article révisé par les pairs
| Résumé : | Two new cyclometalated Ir(III) diimine complexes were used as photosensitizers for homogeneous hydrogen evolution reaction (HER). These complexes were characterized by electrochemistry, ultraviolet-visible absorption, time-resolved and steady-state photoluminescence spectroscopy as well as by theoretical methods. The metal-ligand-to-ligand charge transfer character of their lowest excited state was shown to be competent for efficient H2photoproduction in the presence of [Co(dmgH)2(py)Cl] as the hydrogen evolution catalyst, triethanolamine as the sacrificial electron donor, and HBF4as the proton source. Under optimized experimental conditions, both complexes displayed HER over a period of more than 90 h, with turnover numbers reaching up to 11,650, 10,600, and 174 molH2molPS-1under blue-, green-, and red-light irradiation, respectively. Both complexes showed higher stability and efficiency vs HER than most of the previously described systems of the same kind. |
