Abstract
Abstract The unusually pronounced even-odd effect in nematic isotropic transitions observed in liquid crystalline compounds with terminal phenyl ring is reproduced in a mean field model. Calculations are presented for the first five members of ω-phenylalkyl 4-(-p-cyanobenzylideneamino) cinnamates. The conformational and dispersion energies for the rigid part and the terminal ring of a molecule in the field of other molecules are considered but the aliphatic chain anisotropic interaction is neglected for simplicity. The chain conformations, however, directly influence the relative configuration of the central rigid part and the terminal ring and as a result the longitudinal polarizability of the molecules changes.
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