Metastable Reaction Mixtures for the in Situ Polymerization of Conducting Polymers

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• 作者：Elda Bravo-Grimaldo ; Sarah Hachey ; Colin G. Cameron ; Michael S. Freund
• 刊名：Macromolecules
• 出版年：2007
• 出版时间：October 2, 2007
• 年：2007
• 卷：40
• 期：20
• 页码：7166 - 7170
• 全文大小：475K
• 年卷期：v.40,no.20(October 2, 2007)
• ISSN：1520-5835

文摘

The widespread use of conducting polymers in technological applications has been hindered bypoor processability; strong intermolecular interactions prohibit thermal processing and reduce solubility inconventional solvents. To date, there has been a focus on the disruption of these interactions through thefunctionalization of the polymer backbone or the stabilization of colloidal polymer. In this work, we present ageneralized approach to the synthesis of conducting polymers that uses an easily processable mixture of monomerand oxidant that is metastable in solution, yet rapidly polymerizes upon solvent evaporation. This procedure wasoriginally used for the polymerization of pyrrole and is now demonstrated as a general approach by extendingthe method to the polymerization of thiophene. The method allows the casting and spin-coating of films withsimilar conductivities and redox properties to those of electrochemically generated thin films, without the needfor a conducting substrate. Films produced via spin-coating are smooth with a thickness of 100-200 nm andshow conductivities in the range 0.2-0.3 S cm^-1. Microscopic and spectroscopic characterizations are alsopresented.