B. Bing
2006
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Journal
Chemical Journal of Chinese Universities-chinese
Abstract
A novel type of H-bonded liquid crystals, namely 3,4,5-{4-\(4-methoxy-phenyl)-azo\-phen-oxy}-alkoxy-benzoic acid(D_n, n=3,6,10), was synthesized and characterized. The FT IR spectra of D_ 10 in the range of 1 670—1 650 cm~ -1 at different temperatures were examined. The results show that the carboxyl acid groups in D_ 10 are associated to form intermolecular double hydrogen bonding between —CCDS1O and —OH groups in crystalline up to the isotropic phase. The benzoic acid derivatives exhibiting nematic phase were obtained through molecular design by preventing segregation and modulating intermolecular interactions effectively .