Visible-Light-Triggered Molecular Photoswitch Based on Reversible E/Z Isomerization of a 1,2-Dicyanoethene Derivative
Visible-Light-Triggered Molecular Photoswitch Based on Reversible E/Z Isomerization of a 1,2-Dicyanoethene Derivative
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DOI：
10.1002/anie.201410945
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发表时间：
2015-04-13
影响因子：
16.6
通讯作者：
Katz, Howard E.
中科院分区：
文献类型：
--
作者：
Guo, Xin;Zhou, Jiawang;Katz, Howard E.
设计的基于双（二噻吩基）二氰基乙烯的严格E/Z光开关（4 TCE）通过可见光的状态选择性（E和Z异构体）光活化来操作。4 TCE的E和Z异构体具有明显不同的光谱特性，包括它们的最大吸收峰（（max））的大分离（70 nm）和摩尔消光系数从顺式到反式增加2.5倍。当暴露于白色光时，能量稳定的反式可以在几分钟内完全转化为顺式，而在蓝光照射下容易发生逆异构化（
A designed bis(dithienyl) dicyanoethene-based, strictly E/Z photoswitch (4TCE) operates through state-selective (E and Z isomer) photoactivation with visible light. The E and Z isomers of 4TCE exhibit remarkably different spectroscopic characteristics, including a large separation (70nm) in their absorption maxima ((max)) and a 2.5-fold increase in molar extinction coefficient from cis to trans. The energetically stable trans form can be completely converted to the cis form within minutes when exposed to white light, whereas the reverse isomerization occurs readily upon irradiation by blue light (