title: Structure-distortion-induced photomagnetic effect in azobenzene/polyoxometalate Langmuir-Blodgett films.
abstract: We have prepared photomagnetic Langmuir-Blodgett films composed of an amphiphilic azobenzene and a magnetic polyoxometalate. The obtained film possesses a well-organized layered structure where polyoxometalate anions are sandwiched by azobenzene cations in a single-layered manner. Reversible photoisomerization of azobenzene was achieved even at low temperature, accompanying intensity changes in the d-d transition of polyoxometalate anions. The photomagnetic effect was observed reversibly upon alternate UV and visible light irradiation. Based on polarized spectroscopy, the observed photomagnetic effect is ascribed to the structure-distortion of polyoxometalate layers.
authors.affiliation: Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan. takyama@chem.keio.ac.jp einaga@chem.keio.ac.jp.
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Umemura
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Einaga