Mesogen jacketed liquid crystalline polyacetylene containing   triphenylene discogen: synthesis and phase structure

doi:10.1039/c2py20535a

CORC > 北京大学 > 化学与分子工程学院

	Mesogen jacketed liquid crystalline polyacetylene containing triphenylene discogen: synthesis and phase structure
	Yu, Zhen-Qiang ; Lam, Jacky W. Y. ; Zhao, Keqing ; Zhu, Cai-Zhen ; Yang, Shuang ; Lin, Jie-Sheng ; Li, Bing Shi ; Liu, Jian-Hong ; Chen, Er-Qiang ; Tang, Ben Zhong
刊名	polymer chemistry
	2013
关键词	RATIONAL SYNTHESIS SIDE-GROUPS METATHESIS POLYMERIZATION OPTICAL-PROPERTIES PENDANT GROUPS POLYMERS BEARING POLYACRYLATES VISUALIZATION PERMEABILITY
DOI	10.1039/c2py20535a
英文摘要	Triphenylene-containing acetylenes with one or three methylene units as spacers and the corresponding mesogen-jacketed liquid crystalline polyacetylenes (MJLCPAs) were designed and synthesized, the mesomorphic properties and phase behaviors of the monomers and novel side-chain liquid crystalline polymers were investigated. The monomers [HC C(CH2)(m)C18H6(OC6H13)(5); m = 1, 3] are prepared by consecutive etherization, coupling, and etherization reactions, and the chemical structures were confirmed by mass spectroscopy and H-1/C-13-NMR. The phase behaviors of the monomers were investigated by differential scanning calorimetry (DSC), polarized light microscopy (PLM), and wide-angle X-ray diffraction (WAXD). The results show that both of the monomers form a hexagonal columnar liquid crystal phase at room temperature. The monomers are polymerized using [Rh(nbd)Cl](2) as catalyst and producing soluble polymers in the yields of 55% and 52%, respectively. The chemical structures and phase behaviors of the two polymers are characterized and evaluated by IR, NMR, TGA, DSC, and WAXD analyses. Both of the two polymers show enhanced thermal and chemical stability with thermal decomposition temperatures up to higher than 340 degrees C due to the protection of the "jacketed effect" of the side-chain triphenylenes wrapped around the rigid polyacetylene main-chain. The polymers adopt a columnar shaped structure and self-organized into hexagonally packed columnar phase. The relative electron density maps of the columnar structure are also reconstructed.; Polymer Science; SCI(E); EI; 13; ARTICLE; 4; 996-1005; 4
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/291282]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Yu, Zhen-Qiang,Lam, Jacky W. Y.,Zhao, Keqing,et al. Mesogen jacketed liquid crystalline polyacetylene containing triphenylene discogen: synthesis and phase structure[J]. polymer chemistry,2013.
APA	Yu, Zhen-Qiang.,Lam, Jacky W. Y..,Zhao, Keqing.,Zhu, Cai-Zhen.,Yang, Shuang.,...&Tang, Ben Zhong.(2013).Mesogen jacketed liquid crystalline polyacetylene containing triphenylene discogen: synthesis and phase structure.polymer chemistry.
MLA	Yu, Zhen-Qiang,et al."Mesogen jacketed liquid crystalline polyacetylene containing triphenylene discogen: synthesis and phase structure".polymer chemistry (2013).