Photochromic properties and reaction mechanism of naphthopyran |
| |
Authors: | PAN Guilan WEI Jingqiang ZHU Aiping MING Yangfu FAN Meigong YAO Side |
| |
Institution: | 1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 2. Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, |
| |
Abstract: | The photochromic properties and reaction mechanism of title compounds have been examined with steady method on compounds 3-phenyl-3-3-methylbenzothiophene-2-yl]-3H-naphtho2,1-b]pyran (1) and 3-phenyl-3-benzofuran-2-yl]-3H-naphtho2,1-b]pyran (2) and nanosecond laser flash photolysis techniques on compound 3-phenyl-3-1,2-dimethylindol-3-yl]-3H-naphtho2,1-b]pyran (3). The influence of oxygen on transient spectra and decay kinetics of compound 3 has been investigated. Both excited singlet state and triplet state are involved in the photochromic mechanism of compound 3. The influence of molecular structure on photochromic behavior has been studied also. Decay kinetics indicated that the lifetime of colored forms of 1 and 2 were several orders of magnitude longer than that of 3. |
| |
Keywords: | naphthopyran time-resolved absorption spectra photochromism decay kinetics |
本文献已被 CNKI 万方数据 SpringerLink 等数据库收录! |