Abstract
Abstract Two homologous series of naphthalene derivatives have been synthesized and the mesomorphic behaviour of their members has been studied. In series I the first nine members are enantioropic nematic, the decyl derivative exhibits a reentrant nematic phase and enantiotropic smectic and nematic phases while the remaining members are enantiotropic smectic. In series II the first seven members exhibit nemati, the octyl derivative exhibits monotropic smectic and enantiotropic nematic phases and the remaining members are enantiotropic smectic and nematic or only smectic. The thermal stability of these series is compared with the corresponding homologous series of coumarin derivatives.
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