Synthesis and Properties of an N-Substituted Polypyrrole with Liquid Crystalline Moieties

The synthesis and characterisation of two pyrrole monomers substituted at the N-position with a liquid crystal group are reported. Polymerisation of one of these compounds produced a soluble liquid crystalline semiconducting polymer. The side-chain of the polymer had a flexible spacer of nine methyl...

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Bibliographic Details
Published in:Polymers & polymer composites 2018-05, Vol.26 (4), p.283-288
Main Authors: Almasri, Moayad, Foot, Peter J. S., Brown, John W., Clipson, Jacqueline A.
Format: Article
Language:English
Subjects:
Analysis
Chemical industry
Chemical synthesis
Chromatography
Crystal structure
Crystallinity
Electrical conductivity
Electrical resistivity
Iodine
Liquid crystals
Methods
Microscopy
Optical microscopy
Organic chemistry
Polymerization
Polymers
Polypyrroles
Potassium
Properties
Pyrrole
Structure
Substitutes
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Summary:The synthesis and characterisation of two pyrrole monomers substituted at the N-position with a liquid crystal group are reported. Polymerisation of one of these compounds produced a soluble liquid crystalline semiconducting polymer. The side-chain of the polymer had a flexible spacer of nine methylene units, terminated by a mesogenic cyanobiphenyl group. The new compounds were chemically characterised and were found by hot-stage polarised optical microscopy to exhibit liquid crystal mesophases. The polymer was lightly doped p-type by exposure to iodine vapour, and its electrical conductivity was measured. The polymer synthesis and doping/dedoping processes were also briefly studied by cyclic voltammetry.
ISSN:0967-3911
1478-2391
DOI:10.1177/096739111802600402