Diazocine Derivatives: A Family of Azobenzenes for Photochromism with Highly Enhanced Turn-On Fluorescence
Diazocine Derivatives: A Family of Azobenzenes for Photochromism with Highly Enhanced Turn-On Fluorescence
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重氮辛衍生物：具有高度增强开启荧光的光致变色作用的偶氮苯家族
DOI：
10.1021/acs.orglett.9b01215
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发表时间：
2019
期刊：
影响因子：
5.2
通讯作者：
Chen Pangkuan
中科院分区：
文献类型：
--
作者：
Zhu Qian;Wang Suning;Chen Pangkuan
报道了π共轭偶氮苯衍生物将偶氮基团与芳基荧光团偶联。利用C2桥联偶氮苯的光化学，我们合成了两个基于重氮碱的光开关分子(cAz1和cAz2)。除了显著的光致变色性能外，它们还显示出开启的荧光，发射得到了极大的增强，量子效率提高到0.22forcAz1。发射保持持久，只能通过热停用来关闭。与线性类似物(AZ1-AZ4)相比，它们表现出更大的光学响应。这项工作可能会为使用光开关系统的先进发光材料提供一个新的支架。
π-Conjugated azobenzene derivatives were reported to couple azo moieties with aryl fluorophore. Using the photochemistry of the C2-bridged azobenzene, we have accomplished two diazocine-based photoswitching molecules (cAz1andcAz2). In addition to remarkable photochromic properties, they show a turn-on fluorescence, and the emission was highly enhanced with quantum efficiency increasing up to 0.22 forcAz1. The emission remains persistent and can only be switched off via thermal deactivation. They display greater optical responses, compared with the linear analogues (Az1–Az4). This work may provide a new scaffold toward advanced light-emitting materials using photoswitchable systems.