摘要
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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第1期82-89,共8页
Chemical Journal of Chinese Universities
基金
国家"九七三"计划前期专项(批准号:2010CB635108)
国家"九七三"计划项目(批准号:2011CB201608)
中国博士后科学基金(批准号:20100471755)资助
关键词
树枝状
双极性
溶剂化效应
溶致动力学
Dendrimer
Ambipolar
Solvatochromism
Solvatokinetic effect