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Abstract
A novel liquid crystal (LC) homologues series of ethylene derivatives was synthesized and evaluated for mesomorphic properties. Mesomorphism commences from sixth member of the series. Textures of the nematic phase are threaded or Schlieren and those of the smectic phase are of the focal conic fan type. The N-I and Sm-N transition curves of the phase diagram exhibit odd-even effects and behave in a normal manner. The average thermal stabilities of the smectic and nematic are 113.4 °C and 123.2 °C with mesogenic phase lengths varying between 3.3°C and 8.1 °C and 4.5 °C to 13.5 °C, respectively. The LC behavior of the novel series is compared with a structurally similar known series.
Acknowledgments
Authors acknowledge thanks to the Department of Chemistry (DST-FIST Funded and UGC-SAP Sponsored), Saurashtra University, Rajkot, for research work. Authors are also thankful to Dr. A.V. Doshi, Ex. Principal, M.V.M. Science and Home Science College, Rajkot, for his valuable cooperation during present investigation as and when needed. Also thanks to the National Facility for Drug Discovery through New Chemical Entities (NCEs) for analysis of samples.