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Electrografting of Diazonium‐Functionalized Polyoxometalates: Synthesis,Immobilisation and Electron‐Transfer Characterisation from Glassy Carbon |
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| Authors: | Corentin Rinfray Dr Guillaume Izzet Prof Dr Jean Pinson Dr Sarra Gam Derouich Dr Jean‐Jacques Ganem Dr Catherine Combellas Dr Frédéric Kanoufi Prof Dr Anna Proust |
| Institution: | 1. Institut Parisien de Chimie Moléculaire, UMR CNRS 7201—UPMC Univ Paris 06, Université Pierre et Marie Curie, 4 place Jussieu, case courrier 42, 75252 Paris Cedex 05 (France).;2. Physicochimie des Electrolytes, Colloides et Sciences Analytiques, UMR CNRS 7195—ESPCI ParisTech, 10 rue Vauquelin, 75231 Paris Cedex 05 (France).;3. Institut des NanoSciences de Paris, UMR CNRS 7588—UPMC Univ Paris 06, Université Pierre et Marie Curie, 4 place Jussieu, case courrier 840, 75252 Paris Cedex 05 (France) |
| Abstract: | Polyoxometalates (POMs) are attractive candidates for the rational design of multi‐level charge‐storage materials because they display reversible multi‐step reduction processes in a narrow range of potentials. The functionalization of POMs allows for their integration in hybrid complementary metal oxide semiconductor (CMOS)/molecular devices, provided that fine control of their immobilisation on various substrates can be achieved. Owing to the wide applicability of the diazonium route to surface modification, a functionalized Keggin‐type POM PW11O39{Ge(p‐C6H4‐C?C‐C6H4‐${{\rm N}{{+\hfill \atop 2\hfill}}}$ )}]3? bearing a pending diazonium group was prepared and subsequently covalently anchored onto a glassy carbon electrode. Electron transfer with the immobilised POM was thoroughly investigated and compared to that of the free POM in solution. |
| Keywords: | diazonium grafting electron transfer electron transport polyoxometalates surface immobilization |