Investigations on Ferroelectric Liquid Crystal by High Resolution TEM and Solid State (13)C NMR

	Investigations on Ferroelectric Liquid Crystal by High Resolution TEM and Solid State (13)C NMR
	Zhao YX ; Yang YQ ; Xu JW ; Yang W ; Zhou YC ; Jiang ZJ ; Ge X
刊名	journal of physical chemistry b
	2011
卷号	115 期号:45 页码:13175-13180
关键词	X-RAY-DIFFRACTION TRANSMISSION ELECTRON-MICROSCOPY SMC-ASTERISK PHASE ORIENTATIONAL ORDER MOLECULAR-DYNAMICS SMECTIC-A POLYMERS TRANSITIONS MESOPHASE H-2
ISSN号	1520-6106
通讯作者	xu jw
中文摘要	in order to investigate the structural and dynamical properties of ferroelectric liquid crystal (flc) in different phases a model compound [4-(3)-(s)-methyl-2-(s)-chloropentanoyloxy)]-4'-nonyloxy-biphenyl (3m2cpnob) is synthesized. high resolution transmission electron microscopy (hr-tem) is applied to observe the morphology of 3m2cpnob and temperature-dependent solid state (13)c nmr to record (13)c chemical shifts at different phases. a liquid nitrogen quenching method is used to maintain the conformation of the mesophases for hr-tem experiments. tem images show that all the smectic a (sma), smectic c* (smc) and crystalline phases have lamellar morphology. the interplanar distances in the crystalline phase are smaller than those in sma and smc phases because of denser arrangement of the molecules. both (13)c chemical shifts and line shape vary with different phases. the experimental results suggest that smc* phase as an intermediate occurs in the anisotropy transition process from sma to crystalline phase, the helical structure of the smc* phase unwinds in the magnetic field and the conformations of the sma and isotropic phase are very similar.
收录类别	SCI收录期刊论文
语种	英语
公开日期	2012-06-08
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/44220]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Zhao YX,Yang YQ,Xu JW,et al. Investigations on Ferroelectric Liquid Crystal by High Resolution TEM and Solid State (13)C NMR[J]. journal of physical chemistry b,2011,115(45):13175-13180.
APA	Zhao YX.,Yang YQ.,Xu JW.,Yang W.,Zhou YC.,...&Ge X.(2011).Investigations on Ferroelectric Liquid Crystal by High Resolution TEM and Solid State (13)C NMR.journal of physical chemistry b,115(45),13175-13180.
MLA	Zhao YX,et al."Investigations on Ferroelectric Liquid Crystal by High Resolution TEM and Solid State (13)C NMR".journal of physical chemistry b 115.45(2011):13175-13180.