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International Union of Crystallography, Journal of Applied Crystallography, 3(36), p. 702-707, 2003

DOI: 10.1107/s0021889803003881

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Diffraction analysis of highly ordered smectic supramolecules of conjugated rodlike polymers

Journal article published in 2003 by M. Knaapila ORCID, M. Torkkeli, K. Jokela, K. Kisko, L. E. Horsburgh, L.-O. Palsson, O. H. Seeck, I. P. Dolbnya, W. Bras, G. ten Brinke, Monkman Ap, A. P. Monkman ORCID, O. Ikkala ORCID, R. Serimaa
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Abstract

A small/wide-angle X-ray scattering and grazing incidence diffraction study of comb-shaped supramolecules of conjugated poly(2,5-pyridinediyl), acid dopant and hydrogen bonded amphiphilic side chains is reported. In solution, polymers are dissolved rodlike particles. When the side-chains are introduced, polymers self-assemble in hierarchic liquid crystals (LC). Diffraction patterns of aligned LC show h00, 020, and 004 reflections, and additional small-angle reflections along the polymer axis. A triangular correlation function indicating a very large correlation length is seen along the smectic axis. An aligned solid structure can be formed by cleaving side chains from the aligned LC.