期刊
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
卷 18, 期 9, 页码 2136-2141出版社
SPRINGERNATURE
DOI: 10.1039/c8pp00557e
关键词
-
资金
- JSPS KAKENHI [JP15H01096, JP17H05272]
- MEXT
Although diarylethene derivatives are considered to undergo thermally irreversible photochromic reactions, this is not always the case. Here, we report on thermally reversible photochromic diarylethenes having pyrrole-2-carbonitrile aryl groups. The thermal stability of the coloured closed-ring isomer of 1,2-bis(2-alkyl-5-cyano-1-methyl-3-pyrrolyl) perfluorocyclopentene was found to depend on alkyl substituents at the 2-and 2'-positions. The closed-ring isomer of the ethyl-substituted derivative thermally returned back to the open-ring isomer much faster than that of the methyl-substituted derivative. The difference in the thermal stability was well explained by the ground state energy difference between open-and closed-ring isomers. Excellent fatigue resistance and appropriate thermal fading rates were observed for the derivative having cyano substituents at the 5- and 5'-positions and methyl substituents at the 2-, 2'-, 4- and 4'-positions. The UV-irradiated colouration and thermal decolouration cycle can be repeated more than 10(3) times.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据