Effect of Flexible Units on the Properties of Silicon-containing Phenyleneethynylene Hybrid Oligomers

作     者：Xian-kai Lin Rui Wang Fan Zeng 李书宏 徐彩虹 

作者机构：School of ScienceBeijing Technology andBusiness UniversityBeijing 100048China Institute of ChemistryChinese'Academy of SciencesBeijing 100190China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2016年第34卷第1期

页      面：52-58页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.50673094 and 20774102) 

主　　题：Sonogashira cross coupling Organosilicon unit Hybrid oligomers Thermal properties 

摘      要：New silicon-containing phenyleneethynylene hybrid oligomers P2, P3, and P4 were synthesized via Sonogashira cross-coupling reactions of ethynyl-terminated silazane monomer N,N′-bis（4-ethynylphenyl）-1,1-diphenylsilazane（M1） and corresponding bis-（4-bromo-phenyl）-ended organosilicon unit containing monomers, respectively. These new oligomers were easily soluble in common solvents. The incorporation of flexible organosilicon units in the oligomers leads to blue-shift in both the UV-Vis absorption and fluorescence emission spectra similarly. The results of differential scanning calorimetry（DSC） indicate that the flexible units relieve the rigidity of oligomeric chain and provide favorable conformation for thermal cross-linking reactions. The oligomers show good thermal and thermal-oxidative stability from the thermogravimetric analysis（TGA）, with their decomposition temperature at 10% weight loss（T10%） higher than 400 ？C under both nitrogen and air atmosphere.