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Synthesis, Photochromism Properties of A Hybrid Diarylethene with Hydroxyl Group

机译：具有羟基的杂二芳基乙烯的合成，光致变色性能

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摘要

An unsymmetrical diarylethene derivative l-(2,5-dimethyl-3-thienyl)-2-[2-methyl-5-(4-hydroxylphenyl)-3-thienyljhexafluorocyclopentene (1a) was synthesized. At the same time, its photochromic properties and fluorescence switch were investigated in detail. The results showed that this compound exhibited reversible photochromism, undergoing reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light both in solution and in PMMA film, and its absorption maxima were observed at 547 run in hexane and at 554 nm in PMMA amorphous film, respectively, upon irradiation with 297 nm UV light. The fluorescence intensity of diarylethene decreased dramatically along with the photochromism from open-ring isomer to closed-ring isomer upon irradiation with 297 nm UV light in hexane. In hexane the open-ring isomer of the diarylethene 1 exhibited relatively fluorescence at 507 nm when excited at 375 nm. This new photochromic compound also exhibited remarkable optical storage character.
机译：合成了不对称的二芳基乙烯衍生物1-（2，5-二甲基-3-噻吩基）-2- [2-甲基-5-（4-羟基苯基）-3-噻吩基六氟环戊烯（1a）。同时，对其光致变色性质和荧光开关进行了详细研究。结果表明，该化合物在溶液和PMMA膜中交替照射紫外线和可见光后，表现出可逆的光致变色，并经历可逆的环化和环还原反应，并且在547 nm的己烷和554 nm的PMMA非晶态中观察到其最大吸收分别在297 nm的紫外线下照射。在己烷中用297 nm紫外线辐照后，二芳基乙烯的荧光强度随开环异构体到闭环异构体的光致变色而显着降低。在己烷中，当在375 nm处激发时，二芳基乙烯1的开环异构体在507 nm处显示相对荧光。这种新的光致变色化合物还表现出显着的光学存储特性。

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