Zero field N.M.R. of uniaxial and biaxial smectic liquid crystals

Zero field N.M.R. of uniaxial and biaxial smectic liquid crystals
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零场核磁共振

DOI:
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发表时间:
1987
期刊:
影响因子:
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通讯作者:
A. Pines
A. Pines
中科院分区:
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文献类型:
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作者:
M. Luzar;A. Thayer;A. Pines

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通过高场和零场核磁共振谱的比较,研究了三种近晶相液晶体系的核磁共振谱。探针分子的光谱。CH_2Cl_2溶质分子质子偶极相互作用的运动平均化反映了近晶A、B和E相的局部对称性。在近晶E系统中,即使在未对准的样品中,相位的双轴性的开始也是明显的。
A study of three smectic liquid crystal systems is made through a comparison of the high field and zero field N.M.R. spectra of probe molecules. The motional averaging of the proton dipolar interaction of a CH2Cl2 solute molecule reflects the local symmetry of Smectic A, B and E phases. In the Smectic E system, the onset of the biaxiality of the phase is clearly evident even in an unaligned sample.