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Issue 22, 2015
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Stabilised columnar mesophases formed by 1 : 1 mixtures of hexaalkoxytriphenylenes with a hexaphenyltriphenylene-based polymer

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Abstract

The synthesis is reported for a main chain polymer in which the repeat units are 2,3,6,7,10,11-hexaphenyltriphenylene moieties linked through flexible dodecyl chains. In compositions with a series of 2,3,6,7,10,11-hexakis(alkoxy)triphenylenes (HATn) this new polymer forms stable hexagonal columnar liquid crystal phases. These are investigated in detail using optical polarised microscopy (OPM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). In these mixtures, suppression of crystallisation and enhancement of the clearing temperatures leads to very wide liquid crystal ranges: much wider than those for the HATn materials on their own. For the longer chain HATn compounds (n = 12–16) a columnar rectangular phase is also observed. The enhancement of the liquid crystal phase range is attributed to stabilising complementary polytopic interactions between the planar aromatic moieties.

Graphical abstract: Stabilised columnar mesophases formed by 1 : 1 mixtures of hexaalkoxytriphenylenes with a hexaphenyltriphenylene-based polymer

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Publication details

The article was received on 09 Mar 2015, accepted on 07 May 2015 and first published on 08 May 2015


Article type: Paper
DOI: 10.1039/C5TC00661A
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. C, 2015,3, 5754-5763
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    Stabilised columnar mesophases formed by 1 : 1 mixtures of hexaalkoxytriphenylenes with a hexaphenyltriphenylene-based polymer

    S. R. McLaren, D. J. Tate, O. R. Lozman, G. H. Mehl and R. J. Bushby, J. Mater. Chem. C, 2015, 3, 5754
    DOI: 10.1039/C5TC00661A

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