title: Formation of highly stabilized intramolecular dimer radical cation and pi-complex of [3n]cyclophanes (n = 3, 5, 6) during pulse radiolysis.
abstract: Formation of radical cation and charge-transfer complex of [3n]cyclophanes (n = 3, 5, 6) was investigated by transient absorption spectroscopy during pulse radiolysis. Radical cations of [3n]cyclophanes showed the charge resonance band around 700 nm which exhibited a blue-shift as the number of trimethylene bridges increased, indicating formation of highly stabilized intramolecular dimer radical cation of [3n]cyclophanes. The absorption peak of the charge-transfer complex with chlorine atom also showed the shift in accord with the oxidation potential of [3n]cyclophanes.
authors.affiliation: The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan. piero@dyn.unipg.it
authors.forename: Mamoru
authors.initials: M
authors.lastname: Fujitsuka
authors.forename: Shingo
authors.initials: S
authors.lastname: Samori
authors.forename: Michihiro
authors.initials: M
authors.lastname: Hara
authors.forename: Sachiko
authors.initials: S
authors.lastname: Tojo
authors.forename: Satoko
authors.initials: S
authors.lastname: Yamashiro
authors.forename: Teruo
authors.initials: T
authors.lastname: Shinmyozu
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Majima