Photochromism of Dithiazolylethenes Having Methoxy Groups at the Reaction Centers
✍ Scribed by Shizuka Takami; Tsuyoshi Kawai; Masahiro Irie
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 111 KB
- Volume
- 2002
- Category
- Article
- ISSN
- 1434-193X
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✦ Synopsis
Photochromic dithiazolylethenes [1,2-bis(5-methoxy-2-phenylthiazol-4-yl)perfluorocyclopentene (1a) and (5-methoxy-2phenylthiazol-4-yl)-2-(5-methyl-2-phenylthiazol-4-yl)perfluorocyclopentene (2a)] having methoxy substituents at the reaction centers were synthesized and their photochromic reactivity was compared with 1,2-bis(5-methyl-2-phenylthiazol-4-yl)perfluorocyclopentene (3a), which has methyl substituents at the reaction centers. All dithiazolylethene derivatives underwent reversible photocyclization reactions from the open-ring forms 1a, 2a, and 3a to the closed-ring forms 1b, 2b, and 3b, respectively. The photocyclization quantum