Electron dopable molecular wires based on the extended viologens

0360088 - ÚFCH JH 2012 RIV GB eng J - Journal Article
Kolivoška, Viliam - Gál, Miroslav - Pospíšil, Lubomír - Valášek, Michal - Hromadová, Magdaléna
Electron dopable molecular wires based on the extended viologens.
Physical Chemistry Chemical Physics. Roč. 13, č. 23 (2011), s. 11422-11429. ISSN 1463-9076. E-ISSN 1463-9084
R&D Projects: GA ČR GA203/08/1157; GA ČR GA203/09/0705; GA AV ČR IAA400400802; GA MŠMT(CZ) MEB041006
Institutional research plan: CEZ:AV0Z40400503; CEZ:AV0Z40550506
Keywords : electron transfer * spectroelectrochemistry * molecular wires
Subject RIV: CG - Electrochemistry
Impact factor: 3.573, year: 2011

Facile electron transfer in molecules with one dimension greatly exceeding the other two is essential in the development of new molecular electronic devices as these molecules can serve as so-called molecular wires. In this communication the electrochemical behavior of a series of molecules with multiple extended viologen moieties has been studied. We show that the electron transfer in the shortest wire is due to reduction of two identical communicating pyridinium moieties leading to a full charge delocalization, whereas the electron transfer in molecules with n ≥ 2 is due to reduction of initially non-communicating centers. This was confirmed by digital simulation of cyclic voltammograms. All studied molecules accept reversibly at least four and up to ten electrons without any long-term chemical changes, which is a prerequisite for their future application.
Permanent Link: http://hdl.handle.net/11104/0197724