Sulfonium Polyoxometalates: A New Class of Solid-State Photochromic Hybrid Organic–Inorganic Materials
Inorganic Chemistry2013Vol. 52(2), pp. 555–557
Citations Over TimeTop 10% of 2013 papers
Khadija Hakouk, Olivier Oms, Anne Dolbecq, Hani El Moll, Jérôme Marrot, M. Evain, Florian Molton, Carole Duboc, Philippe Deniard, Stéphane Jobic, Pierre Mialane, Rémi Dessapt
Abstract
For the very first time, sulfonium polyoxometalate (POM) assemblies are shown to develop efficient solid-state photochromism in ambient conditions. The optical properties of the already known Rb(0.75)(NH(4))(5.25)[(Mo(3)O(8))(2)O(O(3)PC(CH(2)S(CH(3))(2))OPO(3))(2)]·8H(2)O (1) and a new material (Me(3)S)(4)[Mo(8)O(26)] (2) under UV excitation are investigated by diffuse reflectance spectroscopy, revealing that the color change effect is highly tunable playing with the nature of the POM. A mechanism involving the photoreduction of Mo(6+) cations associated with electron transfers from the sulfonium cations toward the POMs is proposed.
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