Influence of the Substituent and Polymerization Methodology on the Properties of Chiral Poly(dithieno[3,2-b:2',3'-d]pyrrole)s

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• 作者：Guy Koeckelberghs ; Lieven De Cremer ; Andr&eacute ; Persoons ; Thierry Verbiest
• 刊名：Macromolecules
• 出版年：2007
• 出版时间：June 12, 2007
• 年：2007
• 卷：40
• 期：12
• 页码：4173 - 4181
• 全文大小：198K
• 年卷期：v.40,no.12(June 12, 2007)
• ISSN：1520-5835

文摘

New poly(N-substituted dithieno[3,2-b:2',3'-d]pyrrole)s (PDTPs) with high molecular weights, goodyields, and increased solubility were prepared, and their supramolecular behavior was studied. The polymersdiffer 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 sidechains employed, while the yield and, to a lesser extent, the molecular weight depend on the polymerizationmethod. In general, Stille-couplings proved to be the best polymerization method for PDTPs. The higher molecularweight polymers showed more defined voltammograms, higher _max together with the presence of a vibronicfine-structure, and higher fluorescence yields than lower molecular weight materials. In solution, the polymersare 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.