title: Redox potential inversion by ionic hydrogen bonding between phenylenediamines and pyridines.
abstract: In electrochemical oxidations, the second oxidation potential of phenylenediamines (PD) varies because of hydrogen-bonding formation for PD(+•) with pyridines. A linear relationship was obtained for the potential shift as a function of pK(a) of the protonated pyridines and potential inversion could be observed. The oxidized PD(+•) could also form hydrogen bonding with alcohols and the shift of potential exhibits a different pattern.
authors.affiliation: Department of Applied Chemistry, National Chi Nan University, Puli, Nantou, Taiwan.
authors.forename: Yi-Chun
authors.initials: YC
authors.lastname: Chung
authors.forename: Yi-Jung
authors.initials: YJ
authors.lastname: Tu
authors.forename: Shih-Hua
authors.initials: SH
authors.lastname: Lu
authors.forename: Wan-Chi
authors.initials: WC
authors.lastname: Hsu
authors.forename: Kuo Yuan
authors.initials: KY
authors.lastname: Chiu
authors.forename: Yuhlong Oliver
authors.initials: YO
authors.lastname: Su