Document Server@UHasselt >
Research >
Research publications >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/9831

Title: Efficient formation, isolation and characterization of poly(3-alkylthiophene) nanofibres: probing order as a function of side-chain length
Authors: OOSTERBAAN, Wibren
Berson, Solenn
Guillerez, Stephane
Douheret, Olivier.
LUTSEN, Laurence
Issue Date: 2009
Publisher: Royal Society of Chemistry
Citation: 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
URI: http://hdl.handle.net/1942/9831
DOI: 10.1039/b900670b
ISI #: 000268264400021
ISSN: 0959-9428
Category: A1
Type: Journal Contribution
Validation: ecoom, 2010
Appears in Collections: Research publications

Files in This Item:

Description SizeFormat
Postprint, includes Supplementary Information2.53 MBAdobe PDF

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.