Molecular Crystals and Liquid Crystals (1969-1991) p. 43 - 77 (1981)
Update date:2022-08-05
Topics: Sulfur Ester Linkage Mesomorphic Properties Experimental Ether oxygen atom 4-alkylphenyl-4'-alkyl or alkoxybenzoates Substituting
Neubert
Cline
Zawaski
Wildman
Ekachai
A variety of homologs of 4-alkylbenzenethio-4 prime -alkyl or alkoxybenzoates in which the 4 prime -alkoxy group is C//7-C//1//4, the 4 prime -alkyl group is C//7-C//1//4, the 4 prime -alkyl group is C//7-C//1//2 and the 4-alkyl group is C//5-C//8 or C//1//0 were prepared and their mesomorphic properties studied by microscopy, DSC and X-ray diffraction. A comparison is made of the mesomorphic properties in the thio- and oxy-esters and the effect on mesomorphic properties of replacing the ether oxygen atom in the ester linkage with a sulfur atom. The types of smectic phases observed are discussed; two apparently new biaxial smectic phases were found in the akoxy-alkyl series. Relationships between mesomorphic and thermodynamic properties with molecular structure are discussed.
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