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Pseudolayered structure of the columnar B1 phase of bent-core liquid crystals

AuthorsMartínez-Perdiguero, J.; Etxebarria, Jesús; Folcia, César L.; Ortega, Josu; Gimeno, Nélida; Ros, M. Blanca
Issue DateOct-2010
PublisherAmerican Physical Society
CitationPhysical Review E 82(4): 041706 (2010)
AbstractThree bent-core liquid-crystal compounds presenting the unusual columnar B1 to tilted polar smectic (Sm-CP or B2) phase transition are studied through small-angle x-ray diffraction on aligned samples. The well-established character of the smectic phase helps to characterize the structural changes during the transition. A mechanism for this transition is proposed, which accounts for the low enthalpy usually observed in this process. The B1 phase is found to possess a great degree of lamellarization, with pseudosmectic ferroelectric layers along the crystallographic (11) planes. As a consequence of these observations a distribution of the block polarizations in the columnar structure is proposed.
Description7 páginas, 11 figuras.-- PACS number(s): 61.30.-v, 61.05.cf, 64.70.mj
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevE.82.041706
Appears in Collections:(ICMA) Artículos
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