The time-resolved spectra of a crowned indolinospiroben-zopyran |
| |
Authors: | LIU Shenghua WU Chengtai HAN Zhenhui WANG Wenfeng YAO Side |
| |
Institution: | 1. Department of Chemistry, Wuhan University, Wuhan 430072, China 2. Laboratory of Radiation Chemistry, Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, China |
| |
Abstract: | The photochromic process of an indolinospiropyran with a crown ether fragment (BN-BIPS) was studied by nanosecond laser photolysis technique. The results show that quinonic merocyanine B was formed via an excited singlet state from BN-BIPS; in acetonitrile solution, the transient absorption of merocyanine B showed an obvious decay while a new transient absorption at 440nm (from isomer C) was observed simultaneously. The decay of merocyanine B and the formation of isomer C (at 440nm) were accelerated in the presence of alkali metal cation. In contrast, the formation of isomer C was not observed in spiropyran without a crown ether fragment: BIPS. |
| |
Keywords: | crown ether spiropyran time-resolved spectrum photochromism |
本文献已被 万方数据 SpringerLink 等数据库收录! |