Photochromism of spiropyrans and spirooxazines in the solid state: low temperature enhances photocoloration.
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.
Harada
Jun
J
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
Kawazoe
Yuta
Y
Ogawa
Keiichiro
K