ABSTRACT Compounds with PolyPhenyl rings (PP) or PolyPhenyleneVinylene (PPV) groups have the ideal shape anisotropy required to exhibit liquid crystalline phases and best suited candidates for the study of calamitic mesogens. The influence of the core structure – the number of rings, the nature of linking bridges and the number of bridges – on the liquid crystalline activity of the molecules are discussed in great detail. The diaza and tetraaza analogs of compounds with PPV cores are evaluated in terms of their tendency to form liquid crystalline phases relative to PP and PPV core compounds.
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