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Title: Temperature dependence of the smectic A layer spacing in two re-entrant nematogens
Authors: Chandrasekhar, S.
Suresh, K.A.
Rao, K.V.
Issue Date: 1980
Publisher: Heyden
Citation: Proceedings of the international liquid crystals conference, Bangalore, 1979. Ed. S Chandrasekhar. Heyden, 1980, p131-133
Abstract: Precise X-ray determinations have been made of the temperature variation of the layer spacing in the smectic A phase of two pure re-entrant nematogens, 4-cyanophenyl-3-methyl-4(4-n-dodecylbenzoyloxybenzoate (12CPMBB) and 4-cyano- phenyl-3-methyl-4(4-n-undecylbenzoyloxy)benzoate (11CPMBB). The observed behaviour is similar in both cases: on cooling from the normal nematic-smectic A transition point, the spacing decreases at first over a part of the smectic range, and then increases with decrease of temperature. The results provide clear evidence of a structural rearrangement taking place in the smectic bilayer as a precursor to the formation of the re-entrant nematic phase.
Description: Restricted Access.
Copyright: 1980 Heyden
Appears in Collections:Research Papers (SCM)

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