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Issue 10, 2006
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Odd–even effects in bent-core compounds containing terminal n-alkyl carboxylate groups

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Abstract

A homologous series of eleven five-ring symmetrical bent-core compounds containing terminal n-alkyl carboxylate groups were synthesized, characterized and their dielectric and electro-optical properties have been investigated. The lower homologues (n = 6–11) of the series show B2 structures with an interesting odd–even effect concerning their local director tilt and polar arrangements. This odd–even effect probably is due to steric (entropic) reasons, which are not suppressed by the relatively low polar interaction. Three of the middle homologues display a B7′ phase, which is bistable and shows linear electro-optical switching with a transition to the chiral antiferroelectric smectic phase at a lower temperature. The higher homologues (n = 16, 18) exhibit only a B7′ phase.

Graphical abstract: Odd–even effects in bent-core compounds containing terminal n-alkyl carboxylate groups

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Publication details

The article was received on 07 Apr 2006, accepted on 03 Aug 2006 and first published on 21 Aug 2006


Article type: Paper
DOI: 10.1039/B605061A
Citation: Soft Matter, 2006,2, 875-885
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    Odd–even effects in bent-core compounds containing terminal n-alkyl carboxylate groups

    S. Umadevi, A. Jákli and B. K. Sadashiva, Soft Matter, 2006, 2, 875
    DOI: 10.1039/B605061A

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