title: π-Conjugation of two nitronyl nitroxides-attached diarylethenes.
abstract: Unusual blue shift of the absorption maxima of two nitronyl nitroxide attached diarylethene through phenyl units (DAE-phe-NN) with increasing number of phenyl units is examined by time dependent density functional theory (TDDFT). The extended π-conjugation between nitronyl nitroxide and diarylethene is rather suppressed by the bridge phenyl units. In comparison, the red shift found in two nitronyl nitroxide attached diarylethenes through thiophene units (DAE-thio-NN) with increasing number of thiophene units is due to the longer π-conjugation induced by smaller dihedral angles between diarylethene and bridge and between bridges.
authors: Nakamura Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. yokojima@riken.jp
authors: Satoshi
authors: S
authors: Yokojima
authors: Takao
authors: T
authors: Kobayashi
authors: Keiko
authors: K
authors: Shinoda
authors: Kenji
authors: K
authors: Matsuda
authors: Kenji
authors: K
authors: Higashiguchi
authors: Shinichiro
authors: S
authors: Nakamura