title: Photochromism of dithienylethene single crystals having anthracene substituents.
abstract: Three dithienylethene derivatives having anthracene substituents (connected at 1-, 2- and 9-positions) were prepared. Although these three derivatives exhibit photochromic reactivity in solution, only one of the derivatives (connected at 2-position) undergoes the photochromic reaction in the crystalline phase. X-Ray crystallographic analysis and DFT calculation revealed that conformation of the anthracene substituents plays an important role in the crystalline photochromism.
authors.affiliation: Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Ohara
authors.forename: Masakazu
authors.initials: M
authors.lastname: Morimoto
authors.forename: Masahiro
authors.initials: M
authors.lastname: Irie