Synthesis and mesomorphic properties of a new chiral series with a heterocycle in the molecular core |
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Authors: | C. Da Cruz J. C. Rouillon J. P. Marcerou H. T. Nguyen |
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Affiliation: | Centre de Recherche Paul Pascal Université de Bordeaux I Avenue A. Schweitzer F-33600 Pessac France |
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Abstract: | We report a number of different homologous series with a heterocycle incorporated in the molecular core near the chiral chain. Two of these series differ in the type of chiral chain, -CH*(CH3)C6H13 or -CH*(CH3)-CO2-C4H9. Their properties are compared and found to show completely different polymorphism. The first series exhibits only SmC* and SmA phases whereas the second possesses TGB, N* and BP phases. The mesomorphic properties were studied by optical microscopy, DSC and electro-optical measurements. The effect of substitution of the phenyl ring near the chiral chain by a heterocycle is discussed. |
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Keywords: | 1,3-thiazole ferroelectric chevron-free SNAr |
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