Structure Effect on Photochromic Mechanism of Spirooxazines
作者:
Ping Fan,
Yi Zhang,
Aiping Zhu,
Yangfu Ming,
M.G. Fan,
Weizhen Lin,
Side Yao,
Y. Yokoyama,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 344,
issue 1
页码: 151-156
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023829
出版商: Taylor & Francis Group
关键词: Photochromism;Spirooxazines;Structure effect;Laser photolysis;AM1 calculation
数据来源: Taylor
摘要:
Structure effect on photochromic mechanism of 1,3,3-trimethylspiro[indoline-2,3′-[3H]naphtho[2,1,-b][1,4]oxazine] (SP1), 1,3-Dimethyl-3,2′-(1,3 -propylene)spiro[indoline-2,3′-[3H] naphtho[2,1-b][1,4]oxazine] (SP2) and 1,2′-(1,3-propylene),3,3-dimethylspiro[indo- line-2,3′ [3H]naphtho[2,1-b][1,4]oxazine](SP3) have been studied by nanosecond laser photolysis. Because of different connective positions of 1,3-propylene group in SP2 and SP3, the photochromic behaviours of them are quite different. One photoproduct of SP2 was only detected, and its lifetime is about 0.15μs. However, two colored forms of SP3 were detected after UV irradiation. The lifetimes of them are much longer than that of C-SP2. The semiempirical computational results by AM1 method were coincided with the experimental results.
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