Effect of molecular structure on the phase behaviour of some liquid crystalline compounds and their binary mixtures IV. Dependence of Tc on the anisotropy of the aryl-X of polarizability bond
作者:
MAGDI M. NAOUM,
REFAAT I. NESSIM,
GAMAL R. SAAD,
TALAL A. ABDEL AZIZ,
期刊:
Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 25,
issue 1
页码: 73-83
ISSN:0267-8292
年代: 1998
DOI:10.1080/026782998206515
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Transition temperatures of binary mixtures of the two series, 4-hexadecyloxyphenyl-4- substituted benzoates (Ia-d) and 4-substituted phenyl-4-hexadecyloxybenzoates (IIa-d), have been determined on cooling and the phase diagrams compared with those previously obtained on heating. Tc values for the monotropes and the non-LC analogues have been evaluated by extrapolation. Examination of both series revealed that the square root of Tc is related to the polarizability anisotropy, Delta alphaX, of the CAr-X bond, except for the methoxy derivatives.
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