Synthesis and photochromic reactivity of a diarylethene dimer linked by a phenyl group
Synthesis and photochromic reactivity of a diarylethene dimer linked by a phenyl group
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DOI：
10.1016/j.tet.2003.08.061
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发表时间：
2003-10-13
期刊：
影响因子：
2.1
通讯作者：
Irie, M
中科院分区：
文献类型：
--
作者：
Kobatake, S;Irie, M
合成了一个苯基连接的二乙烯二聚体，并对其光致变色行为进行了研究。在紫外光（λ =313 nm）照射下，二乙烯二聚体（1a）的己烷溶液变为紫蓝色。在进一步延长照射时间后，颜色变为蓝色。紫蓝色和蓝色是由于形成一个二聚体具有一个开环和一个闭环形式（1b）和一个二聚体具有两个闭环形式（1c）。1b和1c通过可见光（λ >500 nm）照射返回la。通过测量光环化和光环还原反应的量子产率来评价其光致变色反应性。光环化量子产率为0.50。1c ~ 1b环还原量子产率（0.0026）低于1b ~ 1a环还原量子产率（0.0094）。(C) 2003 Elsevier Ltd.版权所有。
A diarylethene dimer linked by a phenyl group was synthesized and the photochromic behavior was examined. Upon irradiation with ultraviolet light (lambda=313 nm), a hexane solution of the diarylethene dimer (1a) turned purple blue. Upon further prolonged irradiation the color changed to blue. The purple-blue and blue colors are due to the formation of a dimer having one open- and one closed-ring forms (1b) and a dimer having two closed-ring forms (1c), respectively. Both 1b and 1c returned to la by irradiation with visible light (lambda>500 nm). The photochromic reactivity was evaluated by measuring quantum yields of the photocyclization and photocycloreversion reactions. The photocyclization quantum yield was 0.50. The cycloreversion quantum yield from 1c to 1b (0.0026) was lower than that from 1b to 1a (0.0094). (C) 2003 Elsevier Ltd. All rights reserved.