Title: Influence of the substituent and polymerization methodology on the properties of chiral poly(dithieno[3,2-b : 2',3'-d]pyrrole)s
Authors: Koeckelberghs, Guy ×
De Cremer, Lieven
Persoons, Andre
Verbiest, Thierry #
Issue Date: Jun-2007
Publisher: Amer chemical soc
Series Title: Macromolecules vol:40 issue:12 pages:4173-4181
Abstract: New poly(N-substituted dithieno[3,2-b:2',3'-d]pyrrole)s (PDTPs) with high molecular weights, good yields, and increased solubility were prepared, and their supramolecular behavior was studied. The polymers differ in their polymerization method (using chemical oxidants, Stille-couplings, or a Yamamoto-type polymerization) and the bulkiness of the side chain. The solubility of the polymer depends on the bulkiness of the side chains employed, while the yield and, to a lesser extent, the molecular weight depend on the polymerization method. In general, Stille-couplings proved to be the best polymerization method for PDTPs. The higher molecular weight polymers showed more defined voltammograms, higher lambda(max) together with the presence of a vibronic fine-structure, and higher fluorescence yields than lower molecular weight materials. In solution, the polymers are present as highly conjugated rigid rods, which, upon transition to films or in nonsolvents, poorly aggregate. The stacking is more complicated in high molecular weight polymers than in low molecular weight samples.
ISSN: 0024-9297
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Polymer Chemistry and Materials
× corresponding author
# (joint) last author

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