Taylor & Francis Group
Browse
tlct_a_1747648_sm6545.docx (134.95 kB)

Self-assembled star-shaped liquid crystals based on 1,3,5-trihydroxybenzene with pendant alkyloxylated azobenzene arms

Download (134.95 kB)
journal contribution
posted on 2020-05-07, 08:49 authored by Irina Carlescu, Aurel Simion, Elena Luiza Epure, Gabriela Lisa, Dan Scutaru

Designing and self-assembly of unconventional star-shaped mesogens or ‘hekates’ are of interest to materials science and molecular electronics. This work presents the synthesis of several symmetric trimeric liquid crystalline compounds comprising 1,3,5-trihydroxybenzene (phloroglucinol) as central core. The liquid crystalline behaviour was induced by attaching three rod-like azo-aromatic semi-flexible units to the central core via esteric linkages. Based on differential scanning calorimetry and polarising optical microscopy, the mesophase stability mainly depends on the alkyl chain length. The compounds showed monotropic or enantiotropic behaviour, except the compound with nine atoms on the chain end which is non-mesomorphic. In addition to the synthesis and mesophase characterisation, the self-assembled structures and individual properties have been characterised by molecular simulations.

Funding

This work was supported by the National Research Grants of the TUIASI [project number GnaC2018_91/2019].

History

Usage metrics

    Liquid Crystals

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC