Abstract
Two series of bent-core liquid crystals with 1,3,4-thiadiazole as the center unit were synthesized,their liquid crystalline properties were studied by POM and DSC.It is found that both of these two serie thiadiazole compounds exhibite N phase.Among them,the symmetric five benzene ring thiadiazole ester compounds have rather high melting points,the clearing temperatures are more than 360 ℃.The melting points and clearing temperatures of the asymmetric thiadiazole molecules with allyl terminal chains are significantly reduced,and the bent-core molecule with heptyl as terminal groups shows N phase at a very wide temperature range(120 ℃).
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