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Structural ordering in phenyl-substituted polythiophenes
Institutt for Fysikk, Norges Tekn.-Naturvitenskaplige U., N-7491 Trondheim, Norway.
Institutt for Fysikk, Norges Tekn.-Naturvitenskaplige U., N-7491 Trondheim, Norway.
Institutionen för Organisk Kemi, Chalmers Tekniska Hôgskola, S-412 96 Göteborg, Sweden.
Institutionen för Organisk Kemi, Chalmers Tekniska Hôgskola, S-412 96 Göteborg, Sweden.
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2000 (English)In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 33, no 15, 5481-5489 p.Article in journal (Refereed) Published
Abstract [en]

Various substituted poly(phenylthiophene)s have been studied by X-ray diffraction. They are semicrystalline, with very different degrees of crystallinity. Those with para-substituted phenyl groups have a low degree of crystallinity, whereas those with ortho-substituted phenyl groups are more crystalline. The most crystalline materials in this study have two equally long substituents on the phenyl ring, one at the ortho position and the other at the ortho or meta position on the opposite side of the phenyl ring. Poly(3-(2,5-dioctylphenyl)thiophene) (PDOPT) was most thoroughly studied, and a structural model is proposed. The structure of PDOPT is quite different from previously studied substituted polythiophenes in that the octyl side chains are directed normal to the thiophene planes. In this way, the conjugated polymer chains are kept separated from each other. Solution-cast and spin-cast PDOPT films are anisotropic, with the octyl side chains oriented normal to the film surface in both cases. This is contrary to the situation for poly(3-alkylthiophene)s, where solution-cast and spin-cast films orient in different ways.

Place, publisher, year, edition, pages
2000. Vol. 33, no 15, 5481-5489 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-47617DOI: 10.1021/ma9911389OAI: oai:DiVA.org:liu-47617DiVA: diva2:268513
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13

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Pettersson, LarsInganäs, Olle

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