State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
College of Mechanics and Materials, Hohai University, Nanjing, 210000, China.
Chem Asian J. 2018 Nov 2;13(21):3155-3159. doi: 10.1002/asia.201801172. Epub 2018 Sep 26.
A novel tetraphenylethylene (TPE)-bridge-tetraphenylethylene triad has been synthesized, where the o-carboranyl moiety functions as a central bridge and two TPE units are in the lateral positions. This molecular triad has been characterized by various spectroscopic methods, and its structure has been studied by X-ray crystallography as well as theoretical calculations. The impact of the bridging carboranyl unit on the aggregation-induced emission (AIE) characteristics of the TPE-bridge-TPE triad has been investigated. When the central bridge is changed from one-dimensional (1D) alkynyl to three-dimensional (3D) carboranyl, the absolute luminescent quantum yield of the triad increased from 21.2 % to 54.7 % in the solid state, accompanied by a luminescence color change from blue to yellow (94 nm red-shift).
一种新型的四苯乙烯（TPE）-桥-四苯乙烯三联体已经合成，其中 o-卡硼烷部分作为中心桥，两个 TPE 单元位于侧位。该分子三联体已经通过各种光谱方法进行了表征，并通过 X 射线晶体学以及理论计算研究了其结构。研究了桥联卡硼烷单元对 TPE-桥-TPE 三联体聚集诱导发光（AIE）特性的影响。当中心桥从一维（1D）炔基变为三维（3D）卡硼烷时，三联体在固态下的绝对荧光量子产率从 21.2%增加到 54.7%，同时发光颜色从蓝色变为黄色（红移 94nm）。
