title: Photochromism of spiropyrans and spirooxazines in the solid state: low temperature enhances photocoloration.
abstract: In this study we have revealed that spiropyrans and spirooxazines, which have long been believed to be non-photochromic in the solid state, are generally photochromic in the solid state at least at low temperatures and that their photoreactivity increases greatly as the temperature is lowered.
authors.affiliation: Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo, Japan. harada@ramie.c.u-tokyo.ac.jp
authors.forename: Jun
authors.initials: J
authors.lastname: Harada
authors.forename: Yuta
authors.initials: Y
authors.lastname: Kawazoe
authors.forename: Keiichiro
authors.initials: K
authors.lastname: Ogawa