Synthesis and characterization of some new dimesogenic compounds

Yelmaggad, C. V. ; Srikrishna, A. ; Shankar Rao, D. S. ; Krishna Prasad, S. (1999) Synthesis and characterization of some new dimesogenic compounds Liquid Crystals, 26 (10). pp. 1547-1554. ISSN 0267-8292

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We have synthesized four different types of dimesogenic compounds involving the cholesteryl moiety as one of the mesogenic constituents, and have investigated their liquid crystalline properties. The molecular structures of these dimesogens have been confirmed by spectral analyses; they exhibit a rich polymorphism, as revealed by optical microscopic and differential scanning calorimetric observations. The studies show that the mesomorphic behaviour is sensitive to the nature of the terminal alkyl chains, and to the structure of the 'second mesogen' that is attached to the cholesteryl unit through a polymethylene spacer.

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