title: Redox-induced partner radical formation and its dynamic balance with radical dimer in cucurbit[8]uril.
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 (EV(2+)) 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.
authors.affiliation: State Key Laboratory of Fine Chemicals, Dalian University of Technology, 158 Zhongshan Road, Xigang District, Dalian 116012, China.
authors.forename: Tongyan
authors.initials: T
authors.lastname: Zhang
authors.forename: Shiguo
authors.initials: S
authors.lastname: Sun
authors.forename: Fengyu
authors.initials: F
authors.lastname: Liu
authors.forename: Jiangli
authors.initials: J
authors.lastname: Fan
authors.forename: Yi
authors.initials: Y
authors.lastname: Pang
authors.forename: Licheng
authors.initials: L
authors.lastname: Sun
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Peng