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Title: | Efficient formation, isolation and characterization of poly(3-alkylthiophene) nanofibres: probing order as a function of side-chain length | Authors: | OOSTERBAAN, Wibren VRINDTS, Veerle RUTTENS, Bart Berson, Solenn Guillerez, Stephane DOUHERET, Olivier D'HAEN, Jan ADRIAENSENS, Peter MANCA, Jean LUTSEN, Laurence VANDERZANDE, Dirk |
Issue Date: | 2009 | Publisher: | Royal Society of Chemistry | Source: | JOURNAL OF MATERIALS CHEMISTRY, 19(30). p. 5424-5435 | Abstract: | Efficient fibre formation for all regioregular poly(3-alkylthiophene)s (P3ATs) with alkyl chain lengths (A) between 3 and 9 carbon atoms has been accomplished in several solvents. It was observed that for the aliphatic and (chlorinated) aromatic hydrocarbon solvents used, the solvent refractive index offers some rationale to predict the feasibility of a solvent for fibre formation. The fibres were separated from remaining non-organised polymer by centrifugation. This enabled the characterisation of the isolated fibres in function of alkyl chain length (A) with TEM, AFM, XRD and UV-Vis spectroscopy. The fibres are 20 ± 5 nm wide and 0.5 to >4 µm long and mainly crystallize in the common type I crystal phase. The order within the fibres was probed with XRD, SAED, and UV-Vis and was found to strongly improve with increasing alkyl chain length in going from P33T to P35T, resulting in a longer conjugation length. For P35T to P39T the improvement in order is only marginal. Fibres from P37T were found to mainly crystallize in a crystal phase slightly different from type I that we refer to as type I. This new crystal structure has a lattice constant a that is marginally shorter than that of phase I and a slightly longer lattice constant b of 4.0 A and thus in XRD can hardly be distinguished from phase I. It is furthermore characterized by a blue-shifted absorption band in UV-Vis spectroscopy. The type I fibres were converted into normal type I fibres in the solid state at 70 °C and in solution around 50 °C. | Notes: | Reprint Address: Vanderzande, D (reprint author), Hasselt Univ, Inst Mat Res, Campus Diepenbeek,Agoralaan Bldg D, B-3590 Diepenbeek, Belgium - Addresses: 1. Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium 2. CEA Grenoble, INAC, SPrAM, INES,RDI, F-38054 Grenoble 09, France 3. IMEC IMOMEC, B-3590 Diepenbeek, Belgium E-mail Addresses: dirk.vanderzande@uhasselt.be | Document URI: | http://hdl.handle.net/1942/9831 | ISSN: | 0959-9428 | DOI: | 10.1039/b900670b | ISI #: | 000268264400021 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2010 |
Appears in Collections: | Research publications |
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OOSTERBAAN_Journal of Materials Chemistry 2009_final version for publication.pdf | Peer-reviewed author version | 2.53 MB | Adobe PDF | View/Open |
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