title: A frustrated packing model for the B6-B1-SmAPA sequence of phases in banana shaped molecules.
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.
authors.affiliation: Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Bangalore, 560 080, India. aroy@rri.res.in
authors.forename: A
authors.initials: A
authors.lastname: Roy
authors.forename: N V
authors.initials: NV
authors.lastname: Madhusudana