| Abstract
| - Electron transport in electrochemically polymerized films of Ru(5,5‘-bis(2-thienyl)-2,2‘-bithiazole)(bpy)22+and Os(5,5‘-bis(2-thienyl)-2,2‘-bithiazole)(bpy)22+ (bpy = 2,2‘-bipyridine) has been investigated by electrochemical impedance spectroscopy. Electron diffusion coefficients for the M(III/II) mixed valence states aresignificantly higher than for similar nonconjugated polymers, indicating that the conjugated backbone facilitateselectron transport between metal sites. The operation of a hole-type superexchange mechanism is proposedon the basis of the observations that electron transport is faster for the Ru polymer than for the Os polymerand is faster than for the electron-deficient polybenzimidazole based polymers previously investigated.
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