title: Intramolecular dimer radical anions of [3n] cyclophanes: transannular distance dependent stabilization energy.
abstract: Intramolecular dimer radical anions of [3n]cyclophanes generated by gamma-ray irradiation in low-temperature glassy matrices showed an absorption band attributable to charge resonance around 936-1210 nm, from which the stabilization energy of the dimer radical anions were analyzed on the basis of pi-electron delocalization over two benzene rings and the damping factor (beta) was estimated to be 0.35 A(-1), which is smaller than that of the intramolecular dimer radical cation of [3n]cyclophanes, indicating a effective charge delocalization of the dimer radical anions.
authors.affiliation: The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka, 567-0047, Japan.
authors.forename: Mamoru
authors.initials: M
authors.lastname: Fujitsuka
authors.forename: Sachiko
authors.initials: S
authors.lastname: Tojo
authors.forename: Teruo
authors.initials: T
authors.lastname: Shinmyozu
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Majima