Substituent Effects on the Photochromic Properties of Benzothiophene-Based Derivatives
Substituent Effects on the Photochromic Properties of Benzothiophene-Based Derivatives
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DOI：
10.1002/chem.201500647
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发表时间：
2015-06-01
影响因子：
4.3
通讯作者：
Kawai, Tsuyoshi
中科院分区：
文献类型：
--
作者：
Galangau, Olivier;Nakashima, Takuyama;Kawai, Tsuyoshi
合成了五种二芳基乙烯类光致变色衍生物，其结构中分别含有一个中心苯并噻吩单元、一个左手噻唑基和一个右手苯并噻吩基。在反应中心碳原子上没有取代基的噻唑单元的化合物在光照射下显示出前所未有的转变。当噻唑的4-位被甲基保护时，化合物显示出高的光敏性和光致变色性能。在这种情况下，光照射提供了具有迄今为止报道的最高红移吸收最大值的[5]螺烯结构的新化合物。
Five diarylethene photochromic derivatives, the structures of which incorporate a central benzothiophene unit, a left-hand thiazole group, and a right-hand benzothiophene group, have been prepared. The compound with a thiazole unit with no substituent on the reaction-center carbon atom reveals an unprecedented transformation upon light irradiation. When the 4-position of thiazole is protected by a methyl group, the compounds show high photosensitivity and photochromic properties. In this case, light irradiation affords new compounds with [5]helicene structures featuring the highest redshifted absorption maxima reported to date.