title: Planar chirality of twisted trans-azobenzene structure induced by chiral transfer from binaphthyls.
abstract: The absolute configuration of a binaphthyl-azobenzene dyad 2b, which has a chiral axis and a chiral plane, was determined by comparing the experimental circular dichroism (CD) spectra with the theoretical CD spectra calculated by the time-dependent (TD)-DFT method. The CD signals of the trans-azobenzene moiety indicated that the two benzene rings of this moiety are twisted unidirectionally. It is suggested that these dyads with shorter linkers may be suitable for use as chiroptical switches.
authors.affiliation: RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan. ktakaishi@riken.jp
authors.forename: Kazuto
authors.initials: K
authors.lastname: Takaishi
authors.forename: Atsuya
authors.initials: A
authors.lastname: Muranaka
authors.forename: Masuki
authors.initials: M
authors.lastname: Kawamoto
authors.forename: Masanobu
authors.initials: M
authors.lastname: Uchiyama