Dynamic B/N Lewis Pairs: Insights into the Structural Variations and Photochromism via Light‐Induced Fluorescence to Phosphorescence Switching
Dynamic B/N Lewis Pairs: Insights into the Structural Variations and Photochromism via Light‐Induced Fluorescence to Phosphorescence Switching
复制标题
动态 B/N 路易斯对：通过光诱导荧光到磷光转换洞察结构变化和光致变色现象
DOI：
10.1002/anie.202213615
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Zheng, Xiaoyan
中科院分区：
文献类型：
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作者：
Shi, Yafei;Zeng, Yi;Kucheryavy, Pavel;Yin, Xiaodong;Zhang, Kai;Meng, Guoyun;Chen, Jinfa;Zhu, Qian;Wang, Nan;Zheng, Xiaoyan
由于室温磷光（RTP）而产生的超长余辉发射在智能传感器、生物成像和发光器件的发展中至关重要。我们在此提出了一种有效的方法，通过空间可调荧光刘易斯对（LP）的光化学转换实现很少接近的无重原子有机硼烷的磷光。LP在催化和超分子软材料中具有广泛的应用，并以其出色的性能而闻名，但迄今为止尚未被开发用于开发光响应RTP材料。分子内的LPM 1BNM不仅由于可逆的N→B配位而显示出对热处理的动态响应，而且M1 BNM的晶体也经历快速的光致变色转换。结果，观察到从短寿命荧光到长寿命磷光的不寻常发射切换（rad-M1 BNM，τRTP=232 ms）。 在刘易斯对化学领域的报告发现提供了重要的见解，他们的结构动力学，同时也指出了新的机会，光敏材料与快速响应探测器的影响。
Ultralong afterglow emissions due to room‐temperature phosphorescence (RTP) are of paramount importance in the advancement of smart sensors, bioimaging and light‐emitting devices. We herein present an efficient approach to achieve rarely accessible phosphorescence of heavy atom‐free organoboranes via photochemical switching of sterically tunable fluorescent Lewis pairs (LPs). LPs are widely applied in and well‐known for their outstanding performance in catalysis and supramolecular soft materials but have not thus far been exploited to develop photo‐responsive RTP materials. The intramolecular LPM1BNMnot only shows a dynamic response to thermal treatment due to reversible N→B coordination but crystals ofM1BNMalso undergo rapid photochromic switching. As a result, unusual emission switching from short‐lived fluorescence to long‐lived phosphorescence (rad‐M1BNM,τRTP=232 ms) is observed. The reported discoveries in the field of Lewis pairs chemistry offer important insights into their structural dynamics, while also pointing to new opportunities for photoactive materials with implications for fast responsive detectors.