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Durham University

Department of Chemistry

Publication details for Dr Lars-Olof Pålsson

Knaapila, M., Torkkeli, M., Jokela, K., Kisko, K., Horsburgh, L.E., Palsson, L.O., Seeck, O.H., Dolbnya, I.P., Bras, W., ten Brinke, G., Monkman, A.P., Ikkala, O. & Serimaa, R. (2003). Diffraction analysis of highly ordered smectic supramolecules of conjugated rodlike polymers. Journal of Applied Crystallography 36(3): 702-707.

Author(s) from Durham


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.