Iridium and ruthenium complexes covalently bonded to carbon surfaces by means of electrochemical oxidation of aromatic amines

0349259 - ÚFCH JH 2011 RIV NL eng J - Journal Article
Sandroni, M. - Volpi, G. - Fiedler, Jan - Buscaino, R. - Viscardi, G. - Milone, L. - Gobetto, R. - Nervi, C.
Iridium and ruthenium complexes covalently bonded to carbon surfaces by means of electrochemical oxidation of aromatic amines.
Catalysis Today. Roč. 158, 1-2 (2010), s. 22-28. ISSN 0920-5861. E-ISSN 1873-4308
R&D Projects: GA ČR GA203/09/0705
Institutional research plan: CEZ:AV0Z40400503
Keywords : functionalization * glassy carbon electrode * metallorganic complexes * cyclic voltammetry
Subject RIV: CG - Electrochemistry
Impact factor: 2.993, year: 2010

Bis(2-phenylpyridinate-C2,N)-(4-(4-aminophenyl)-2,2′-bipyridine) iridium(III) hexafluorophosphate and bis(2,2′-bipyridine-N,N′)-(4-(4-aminophenyl)-2,2′-bipyridine) ruthenium(II) hexafluorophosphate were synthesized and characterized. In particular, electrochemical analyses showed irreversible amine-centred oxidations, which were exploited to functionalize a glassy carbon electrode. The functionalization was achieved by electrochemical oxidation of the amino group. Surface modification was observed and studied via electrochemical techniques (cyclic voltammetry, square wave voltammetry). The functionalization was performed at different potential values, and the effect of the collidine (2,4,6-trimethylpyridine) was evaluated. The surface coverage was assessed by integration of the peak current of the modified electrode signal. The formation of monolayers or multilayers depends on the oxidation potential used and on the presence of collidine in the functionalization cell.
Permanent Link: http://hdl.handle.net/11104/0189547