Redox-induced partner radical formation and its dynamic balance with radical dimer in cucurbit[8]uril?

Physical Chemistry Chemical Physics Pub Date: 2009-10-16 DOI: 10.1039/B916591F

Abstract

N-(4-Hydroxy-phenoxyethyl)-N′-ethyl-4,4′-bipyridium (1) can form a stable 1?:?1 inclusion complex with CB[8] in aqueous solution, in which the hydroxyphenol (HP) moiety is back-folded and inserted together with the viologen moiety into the cavity of CB[8]. When the ethyl viologen dication (EV2+) in 1 is reduced, chemically or electrochemically, an intramolecular partner radical (EV+˙-HP)/CB[8] can be detected, meanwhile, a dynamic balance between the partner radical and the intermolecular radical dimer (EV+˙-HP)2/CB[8] can be observed.

Graphical abstract: Redox-induced partner radical formation and its dynamic balance with radical dimer in cucurbit[8]uril
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