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High Pressure Studies on Hexa-n-alkoxy Triphenylene Homologous Series

 

作者: D.S. Shankar Rao,   VivekKumar Gupta,   S.Krishna Prasad,   M. Manickam,   Sandeep Kumar,  

 

期刊: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals  （Taylor Available online 1998）
卷期: Volume 319, issue 1  

页码: 193-206

 

ISSN:1058-725X

 

年代: 1998

 

DOI:10.1080/10587259808045659

 

出版商: Taylor & Francis Group

 

关键词: High pressure studies;alkoxy triphenylene series;Clausius-Clapeyron equation;transition volume;Simon-Glatzel equation

 

数据来源: Taylor

 

摘要:

High pressure investigations have been carried out on four successive homologues of the hexa-n-alkoxy triphenylene series exhibiting the hexagonally ordered columnar mesophase. The most remarkable feature is that the slope of the mesophase to isotropic phase boundary (dT/dP)1 barshows a strong decrease with increasing chain length becoming zero for the 8th homologue. To explain this feature we propose an argument based on the ratio of the volume of the triphenylene core to the total volume.

 

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