末端含三甲基硅基树枝状低聚苯的合成与表征  

SYNTHESIS AND CHARACTERIZATION OF POLYPHENYLENE DENDRIMERS CONTAINING TERMINAL TRIMETHYLSILYL GROUPS

作　　者：程格[1] 赵凌[1] 王跃川[1] 

机构地区：[1]四川大学高分子材料科学与工程学院高分子材料工程国家重点实验室,成都610065

出　　处：《高分子学报》2006年第3期523-527,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号50273021)资助项目

摘　　要：Polyphenylene dendrimers 11,12 and 13 containing terminal trimethylsilyl groups have been synthesized by phosphine-free palladium chloride catalyzed Suzuki couplings of 1,3,5-tris(3′,5′-dibromophenyl)benzene 9 with aryl boronic acids 5 and 6.These macromolecules were characterized by Fourier transform infrared (FTIR),nuclear magnetic resonance (NMR) and matrix assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectra.Gel permeation chromatograph (GPC) indicated that the hydrodynamic radium of 12,with trimethylsiliyl (—TMS) groups substituted at para-positions on its terminal benzene rings,was larger than that of 13,with trimethylsiliyl groups substituted at meta-positions on its terminal benzene rings.X-ray powder diffraction patterns showed that dendrimer 12 was of a certain amount of crystallinity and dendrimer 13 was amorphous.Polyphenylene dendrimers 11,12 and 13 containing terminal trimethylsilyl groups have been synthesized by phosphine-free palladium chloride catalyzed Suzuki couplings of 1,3,5-tris （3＇, 5＇-dibromophenyl） benzene 9 with aryl boronic acids 5 and 6. These macromolecules were characterized by Fourier transform infrared （FTIR）, nuclear magnetic resonance （NMR） and matrix assisted laser desorption/ionization time of flight （MALDI-TOF） mass spectra. Gel permeation chromatograph （GPC） indicated that the hydrodynamic radium of 12, with trimethylsiliyl （-TMS） groups substituted at para-positions on its terminal benzene rings, was larger than that of 13, with trimethylsiliyl groups substituted at meta-positions on its terminal benzene rings. X-ray powder diffraction patterns showed that dendrimer 12 was of a certain amount of crystallinity and dendrimer 13 was amorphous.

关 键 词：三甲基硅基 无膦配体氯化钯 Suzuki芳基偶联 树形聚苯 

分 类 号：O632.7[理学—高分子化学]