Unusual Reverse Photochromic Behavior of Indolinobenzospiropyran 6-Carboxylates in Aqueous Binary Solvents

摘要

Thermo- and photochromic indolinobenzospiropyran dyes recently have become important in connection with the rapid development of information recording systems,such as high-density optical data storage,optical switching,displays and non-linear optics.