Terminal Chains as a Tool To Modulate the Properties of Bent-Core Liquid Crystals

Terminal Chains as a Tool To Modulate the Properties of Bent-Core Liquid Crystals

Two series of bent-shaped liquid crystals derived from 4,4′-diphenylmethane and 3,4′-biphenylene moieties have been prepared and studied. The research, focused on the effect of the terminal chains on the mesogenic properties of bent-core compounds, demonstrates that they can be used as a tool to con...

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Veröffentlicht in:Chemistry of materials 2009-10, Vol.21 (19), p.4620-4630
Hauptverfasser: Gimeno, Nélida, Barberá, Joaquín, Serrano, José Luis, Ros, M. Blanca, de la Fuente, M. Rosario, Alonso, Ibon, Folcia, César L
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Sprache:eng
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Characterization of Materials
Liquid Crystals
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container_end_page 4630
container_issue 19
container_start_page 4620
container_title Chemistry of materials
container_volume 21
creator Gimeno, Nélida
Barberá, Joaquín
Serrano, José Luis
Ros, M. Blanca
de la Fuente, M. Rosario
Alonso, Ibon
Folcia, César L
description Two series of bent-shaped liquid crystals derived from 4,4′-diphenylmethane and 3,4′-biphenylene moieties have been prepared and studied. The research, focused on the effect of the terminal chains on the mesogenic properties of bent-core compounds, demonstrates that they can be used as a tool to control their liquid crystal behavior. Together with achiral and chiral alkoxy tails, thioalkoxy chains and unusual terminal structures on bent-core mesogens such as oxyethylene moieties or unsaturated tails of different lengths have been investigated. Mesomorphism as well as dielectric responses of the new materials are reported and discussed in light of structural considerations. Interesting results concerning lowering of transition temperatures, mesophase vitrification, or columnar−lamellar sequences have been achieved by the incorporation of these terminal chains.
doi_str_mv 10.1021/cm901678q
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Liquid Crystals
title Terminal Chains as a Tool To Modulate the Properties of Bent-Core Liquid Crystals
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