A novel strategy for developing yellow diarylethenes based on acid stimulus
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- 作者：Chunhong Zheng ; Shouzhi Pu ; Gang Liu ; Bing Chen
- 关键词：Photochromism ; Diarylethene ; Bromopyridine moiety ; Acidichromism
- 刊名：Tetrahedron Letters
- 出版年：18 December, 2013
- 年：2013
- 卷：54
- 期：51
- 页码：7024-7028
- 全文大小：1597 K
文摘
A novel strategy for the preparation of yellow diarylethenes was established based on the acidichromism of two new diarylethenes with a bromopyridine moiety. The bromopyridine was connected directly to the central perfluorocyclopentene ring to participate in photoisomerization reaction. The two diarylethenes exhibited favorable photochromism and function as notable fluorescence switches in solution. The absorption maxima of their closed-ring isomers shifted dramatically to shorter wavelengths with notable color change from red to yellow upon the stimulation of trifluoroacetic acid.