A frustrated packing model for the B6 -B1 -SmAPA sequence of phases in banana shaped molecules

Roy, A. ; Madhusudana, N. V. (2005) A frustrated packing model for the B6 -B1 -SmAPA sequence of phases in banana shaped molecules The European Physical Journal E: Soft Matter and Biological Physics, 18 (3). pp. 253-258. ISSN 1292-8941

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Official URL: http://dx.doi.org/10.1140/epje/e2005-00033-x

Related URL: http://dx.doi.org/10.1140/epje/e2005-00033-x

Abstract

A vast majority of compounds with bent core or banana shaped molecules exhibit the phase sequence B6-B1-B2 as the chain length is increased in a homologous series. The B6 phase has an intercalated fluid lamellar structure with a layer spacing of half the molecular length. The B1 phase has a two dimensionally periodic rectangular columnar structure. The B2 phase has a monolayer fluid lamellar structure with molecules tilted with respect to the layer normal. Neglecting the tilt order of the molecules in the B2 phase, we have developed a frustrated packing model to describe this phase sequence qualitatively. The model has some analogy with that of the frustrated smectics exhibited by highly polar rod like molecules.

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