Liquid Crystalline Phases in the Homologous Series of Terephthalylidene-BIS-[4-n-Alkylanilines]

The liquid crystalline polymorphism in the homologous series of terphthalylidene-bis-4-n-alkylanilines was investigated by miscibility experiments. The variants of polymorphism found in the members with carbon atoms n = 3 to n = 10 in the alkyl chains can be derived from a variant HGFICA Nthrough the absence of one or several phases. Beside the known phases H, G, F, C, A, and N, the new phase type 1 was found. The results are discussed in connection with investigations on structure.