Polyoxometalates (POMs) form a remarkable class of well-defined nanoclusters with an unmatched diversity of structures and properties. An important property of POMs is their ability to reversibly accept and release specific numbers of electrons under minor structural rearrangement. Therefore, POMs are attractive candidates for the development of photochemical devices aiming at photocumulative electron transfer. In this context, we recently reported the synthesis of inorganic/organic POM-based hybrids in which the POM is covalently connected to different types of photoactive antenna (pyrene, carbocyclometalated ruthenium and iridium complexes).1,2 The resulting photosensitized polyoxometalates displayed very promising photophysical properties. Long-lived charge separation states were observed2 and, in one case, charge photo-accumulation and photo-catalytic hydrogen evolution was achieved.3  We herein describe the synthetic strategy and photophysical properties of this functional and modular system, which constitutes a promising step for the development of charge photo-accumulation devices and subsequent photoelectrocatalysts for artificial photosynthesis. 1 Matt, B.; Coudret, C.; Viala, C.; Jouvenot, D.; Loiseau, F.; Izzet, G.; Proust, A. Inorg. Chem. 2011 , 50, 7761-7768.2 Matt, B. ; Xiang, X.; Kaledin, A. L.; Han, N.; Moussa, J.; Amouri, H.; Alves, S.; Hill, C. L.; Lian, T.; Musaev, D. G.; Izzet, G.; Proust, A. Chem. Sci. 2013 , 4, 1737-1745.3 Matt, B.; Fize, J.; Moussa, J.; Amouri, H.; Pereira, A.; Artero, V.; Izzet, G.; Proust, A. Energy Environ. Sci. 2013  , 6, 1504-1508.

Photoactive hybrid polyoxometalates for charge photoaccumulation and hydrogen photocatalytic evolution

247th National Meeting (2014)

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