Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups

Sergey Ponomarenko*, Natalia Boiko, Evgeny Rebrov, Aziz Muzafarov, Iain Whitehouse, Robert Richardson, Valery Shibaev

*Corresponding author for this work

    Research output: Contribution to journalArticle (Academic Journal)peer-review

    11 Citations (Scopus)

    Abstract

    For the first time a series of liquid crystalline dendrimers of generations 1 - 4 containing 8, 16, 32 and 64 terminal methoxyphenyl benzoate mesogenic groups respectively have been synthesised. Mesogenic groups were attached to the carbosilane dendritic matrices with terminal allyl groups through -OOC-(CH2)10-Si(CH3)2OSi(CH 3)2- spacer by a hydrosilylation reaction. Structure and purity of all new compounds were confirmed by 1H-NMR spectroscopy and GPC analysis. Phase behaviour of LC dendrimers was investigated by means of polarising optical microscopy, DSC and X-ray methods. All LC dendrimers synthesised display mesophases of smectic types as well as crystalline phases over wide temperature region. Possible structure and arrangement of molecules of LC dendrimers in these mesophases are discussed.

    Original languageEnglish
    Pages (from-to)43-50
    Number of pages8
    JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
    Volume332
    DOIs
    Publication statusPublished - 1 Jan 1999

    Keywords

    • Hydrosilylation
    • Liquid crystal dendrimers
    • Smectic mesophase

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