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	二种新型有侧向取代基液晶化合物结构及性质; THE MOLECULAR AND CRYSTAL STRUCTURES AND THERMAL PROPERTIES OF THE MESOGENIC 2,5-BIS(4-ETHYLBENZOYL)OXYSTYRENE AND 2,5-BIS(4-METHOXYBENZOYL)OXYBENZALDEHYDE
	杨清传 ; 戴胜 ; 周洪兵 ; 周其凤 ; 唐有祺
	1993
关键词	侧链型液晶化合物 晶体结构 分子结构 Liquid crystal compound with laterally substituted mesogen Crystal and molecular structure
英文摘要	用X 射线单晶衍射方法测定了液晶化合物2,5-双(4-乙基苯甲酰氯基)苯乙烯(Ⅰ)和2,5-双(4-甲氧基苯甲酰氧基)苯甲醛(Ⅱ)的单晶结构和分子结构.化合物Ⅰ属三斜晶系,空间群P(?),晶胞参数:α=9.356(6)(?),b=9.842(6)(?),c=13.357(8)(?),α=108.68(5)°,β=105.67(5)°,γ=96.36(5)°,Z=2;化合物Ⅱ属单斜晶系,空间群P_n,晶胞参数:α=9.109(2)(?),b=9.187(3)(?),c=23.166(8)(?),β=93.93(2)°,Z=4.在化合物Ⅰ和Ⅱ晶体中,分子均呈伸展构象,分子中的三个苯环平面取向相互成...; The crystal and molecular structures of the mesogenic 2,5-bis-(4-ethylbenzoyl)oxystryene(I) and 2,5-bis(4-methoxybenzoyl)oxybenzaldehyde(II) have been determined by single crystal X-ray diffraction methods. Both compound I and compound II are liquid crystalline. Crystal data: Compound I, C2H5 center dot C6H4 center dot COO center dot C6H3(CH:CH2)center dot OOC center dot C6H4 center dot C2H5, triclinic, space group P (1) over bar (No. 2), a=9.356(6), b=9.842(6), c=13.357(8)angstrom, alpha=108.68(5)degrees, beta=105.67(5)degrees, gamma=96.36(5)degrees, Z=2; Compound II, H3CO center dot C6H4 center dot COO center dot C6H3(CHO)center dot OOC center dot C6H4 center dot OCH3, monoclinic, space group Pn(No. 7), a=9.109(2), b=9.187(3), c=23.166(8)angstrom, beta=93.93(2)degrees, Z=2. In both crystals, the molecules take fully extended form with the long molecular axes of 22.7 angstrom for compound I and of 22.2 angstrom for compound II. The molecules of these two compounds are not plate-like but rather rod-like. The middle phenyl rings of the molecules rotate from the other two phenyl rings by 86.3 degrees and 135.8 for compound I; and by 84.9 degrees and 84.7 degrees for compound II. All molecules are arranged parallel along their long axes in the crystals. Compound I is a polymerizalbe monomer, it easily forms high molecular weight polymer upon heating without any initiators at about 140 degrees C. Its high polymerizability might be explained by the fact that the molecules are packed such that the lateral vinyl groups of neighbouring molecules are closely correlated with a distance of only 4.7 angstrom and the energy-favorable parallel molecuar arrangement, which is similar to the arrangement of the mesogens in its polymer.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000207577800014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 0; 06; 795-801; 9
语种	中文
出处	知网 ; SCI
出版者	物理化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/78647]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	杨清传,戴胜,周洪兵,等. 二种新型有侧向取代基液晶化合物结构及性质, THE MOLECULAR AND CRYSTAL STRUCTURES AND THERMAL PROPERTIES OF THE MESOGENIC 2,5-BIS(4-ETHYLBENZOYL)OXYSTYRENE AND 2,5-BIS(4-METHOXYBENZOYL)OXYBENZALDEHYDE. 1993-01-01.

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