Switching of the Electronic Communication between Two {Ru(trpy)(bpy)} (trpy = 2,2‘:6‘,2‘ ‘-Terpyridine and bpy = 2,2‘-Bipyridine) Centers by Protonation on the Bridging Dimercaptothiadiazolato Ligand

A stable Ru(II)/Ru(III) mixed-valence state was observed in acetonitrile for the ruthenium binuclear complex bridged by dimercaptothiadiazolate (ΔE 1/2 = 220 mV for Ru2(II,II)/Ru2(II,III) and Ru2(II,III)/Ru2(III,III) processes; K com = 5.3 × 103). Upon protonation of the bridging ligand by the addit...

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Veröffentlicht in:Inorganic chemistry 2005-07, Vol.44 (15), p.5206-5208
Hauptverfasser: Tannai, Hidenori, Tsuge, Kiyoshi, Sasaki, Yoichi
Format: Artikel
Sprache:eng
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Zusammenfassung:A stable Ru(II)/Ru(III) mixed-valence state was observed in acetonitrile for the ruthenium binuclear complex bridged by dimercaptothiadiazolate (ΔE 1/2 = 220 mV for Ru2(II,II)/Ru2(II,III) and Ru2(II,III)/Ru2(III,III) processes; K com = 5.3 × 103). Upon protonation of the bridging ligand by the addition of equimolar p-toluenesulfonic acid, however, the mixed-valence state diminished (ΔE 1/2 = 0 mV). The bridging ligand operates as a proton-induced switch of the electronic communication in the dimeric complex.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic050672w