Phase transition behavior and structure of the thermotropic liquid crystal 6-{[(4 '-{[(undecyl)carbonyl]oxy}biphenyl-4yl)carbonyl]oxy}-1-hexyne

doi:10.1002/crat.200510695

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	Phase transition behavior and structure of the thermotropic liquid crystal 6-{[(4 '-{[(undecyl)carbonyl]oxy}biphenyl-4yl)carbonyl]oxy}-1-hexyne
	Liu, Leijing ; Geng, Jianxin ; Yang, Junliang ; Li, Gao ; Zhou, Enle ; Lam, Jacky Wing Yip ; Tang, Benzhong
刊名	CRYSTAL RESEARCH AND TECHNOLOGY
	2006-09-01
卷号	41 期号:9 页码:914-918
关键词	Thermotropic Liquid Crystal Phase Transition Structure Metastable
ISSN号	0232-1300
DOI	10.1002/crat.200510695
英文摘要	The phase transition behaviors and corresponding structures of 6-{[(4'-([(undecyl)carbonyl]oxy)biphenyl-4yl)carbonyl]oxyl-l-hexyne (A4EE11) were investigated using differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and wide angle X-ray diffraction (WAXD). In comparison with the published homologues, 5- [(4'-heptoxy-biphenyl-4-yl)carbonyl]oxyl-1-pentyne (A3EO7) which shows a monotropic smectic A (SmA) phase and a metastable monotropic smectic C (SmC) phase; 5-{ [(4'-heptoxybiphenyl-4-yl)oxy]carbonyl)- I-pentyne (A3E'O7) that exhibits three enantiotropic stable liquid crystalline (LC) phases, SmA phase, SmC phase and smectic X (SmX) phase; 5-{[(4'-heptoxy-biphenyl-4-yl)carbonyl]oxy}-1-undecyne (A9EO7) which has a monotropic SmA phase and a metastable crystal phase, A4EE11 integrates the enantiotropy, monotropy and metastability of the LC phases of those three compounds. Upon cooling from isotropic state to room temperature, in the temperature range of 62.0 to 58.5 degrees C, A4EE11 shows an enantiotropic smectic A (SmA) phase with a layer spacing d=32.69 angstrom. Further lowering the temperature, it enters into a metastable monotropic smectic B (SmB) phase with a longer layer spacing d=34.22 angstrom which has a tendency towards crystallization. The metastability of the liquid crystalline phase may associate to the linkage order of the ester bridge between the mesogenic core and the flexible spacer. (C) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000240369100015
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/59107]
专题	中国科学院化学研究所
通讯作者	Li, Gao
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Liu, Leijing,Geng, Jianxin,Yang, Junliang,et al. Phase transition behavior and structure of the thermotropic liquid crystal 6-{[(4 '-{[(undecyl)carbonyl]oxy}biphenyl-4yl)carbonyl]oxy}-1-hexyne[J]. CRYSTAL RESEARCH AND TECHNOLOGY,2006,41(9):914-918.
APA	Liu, Leijing.,Geng, Jianxin.,Yang, Junliang.,Li, Gao.,Zhou, Enle.,...&Tang, Benzhong.(2006).Phase transition behavior and structure of the thermotropic liquid crystal 6-{[(4 '-{[(undecyl)carbonyl]oxy}biphenyl-4yl)carbonyl]oxy}-1-hexyne.CRYSTAL RESEARCH AND TECHNOLOGY,41(9),914-918.
MLA	Liu, Leijing,et al."Phase transition behavior and structure of the thermotropic liquid crystal 6-{[(4 '-{[(undecyl)carbonyl]oxy}biphenyl-4yl)carbonyl]oxy}-1-hexyne".CRYSTAL RESEARCH AND TECHNOLOGY 41.9(2006):914-918.