Anisotropic diffusion in a nematic liquid crystal -: An electric field PFG NMR approach

被引：18

作者：

Holstein, P ^{[1
]}

Bender, M ^{[1
]}

Galvosas, P ^{[1
]}

Geschke, D ^{[1
]}

Kärger, J ^{[1
]}

机构：

[1] Univ Leipzig, Fak Phys & Geowissensch, D-04103 Leipzig, Germany

来源：

JOURNAL OF MAGNETIC RESONANCE | 2000年 / 143卷 / 02期

关键词：

PFG NMR; electric fields; self-diffusion coefficient; reorientation; liquid crystals;

D O I：

10.1006/jmre.2000.2028

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The access to self-diffusion coefficients in anisotropic systems such as thermotropic liquid crystals by means of PFG NMR is complicated by strong dipolar interactions. Additionally, problems arise due to the immediate orientation of low-molar-mass nematic liquid crystals in an external field. The director orientation can be changed by the application of an additional electric field. This can be exploited in order to reduce the dipolar interaction to such an extent that the NMR linewidths change from a solid-state to a liquid-like situation enabling PFG NMR experiments. (C) 2000 Academic Press.

引用

页码：427 / 430

页数：4

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