Negative Photochromism of a Spiropyran in a Langmuir–Blodgett Film

Abstract

Abstract An indolinospiropyran possessing one long alkyl chain on the nitrogen atom of the indoline moiety and two nitro groups on the benzopyran ring, exhibiting negative photochromism in various organic solvents, showed negative photochromism in a Langmuir–Blodgett film. The change in the surface appearance was observed by atomic force microscopy after the visible light irradiation.