基于四苯乙烯基的水杨醛缩芳胺希夫碱化合物的合成及性能研究

摘要

Tetraphenylethylene and salicylaldehyde were combined together to synthesize five salicy-ladehyde schiff-base derivatives TPE-SA1, TPE-SA2, TPE-SA3, TPE-SA4 and TPE-SA5. FT-IR, NMR, MS, elemental analysis, UV-Vis, solution fluorescence, cyclic voltammetry electrochemical analysis and TG-DTA thermal analysis were used to study their structures, optical properties, ther-mal stability and electrochemical properties. The results show that these compounds have two UV ab-sorption peaks around 260 nm and 370 nm in the dilute solution of THF. A significant aggregation-induced emission ( AIE) effect is found through solution fluorescence tests with different V( THF)/V( H2 O) mixed solvent of these compounds. Cyclic voltammetry ( CV) was employed to characterize the ionization potential and electron affinity, respectively. These results show that all of them have good hole transporting ability and good electron transporting capability. TG/DTA analysis shows that the target products possess good thermal stability.%将四苯乙烯基与取代水杨醛通过碳氮双键连接起来,合成了基于四苯乙烯基的水杨醛缩芳胺希夫碱TPE-SA1、TPE-SA2、TPE-SA3、TPE-SA4、TPE-SA5.利用IR、NMR、MS和元素分析等对其分子结构进行表征,通过紫外-可见光谱、分子荧光光谱、循环伏安分析法和热重测试分别考察了该类化合物的光学、电化学和热稳定性质.实验结果表明:该类化合物在纯THF溶液中,分别在260 nm和370 nm左右处出现B带和R带紫外吸收峰;在四氢呋喃/水的混合溶液中,表现出典型的聚集诱导发光(AIE)性能.目标化合物的热分解温度分别为262,283,295,278,299℃,具有较好的热稳定性.它们的电离势分别为5.31,5.43,5.41,5.30,5.15 eV,电子亲合势均大于4.3 eV.