具有双极性端枝的3D结构化合物的合成及光学性能

Synthesis and Optical Properties of 3D Compounds with Core and D-π-A Dipolar Group

通过Friedel-Crafts和Suzuki等反应合成了4种由核心和D-π-A双极性端基组成的3D结构类树枝状化合物,并采用热重分析(TGA)、差热扫描量热分析和循环伏安等手段对其进行了表征.结果表明,该类化合物具有良好的热稳定性和电化学稳定性;核的引入大大降低了端基D-π-A固态时分子间的聚集效应.分子内电荷转移(ICT)导致化合物溶剂化效应的产生,且其发光强度随着溶剂极性的变化而改变,呈现正、负溶致动力学现象.

Four novel 3D compounds with core and donor-π-acceptor（D-π-A） ambipolar group were synthesized via Suzuki and Friedel-Crafts copolycondensation reaction and charactered by NMR,MS,TGA,DSC and absorption and emission spectrometry.The results indicated that introduction of the cores could efficiently retard the crystallization tendencies of the D-π-A structure and gave the materials completely amorphous morphological structure.As a result of the coexistence of the electron acceptor and donor,these compounds diaplayed reversible electrochemical behavior.All the compounds showed better stability of thermal and electrochemical.The mitigation of aggregation in solid-state were observed by comparing the optical properties of the films between compounds 1—3 and linear counterparts.Four compounds exhibited bathochromism in different solvents due to the intromolecular charge transfer（ICT）.With the changing of the polarity of solvent and the strength of the electron acceptor,the optical properties of compounds could be modified,and the PL intensity of compounds was also tailored with the difference of solvent.