Postpolymerization Grafting of Aniline Tetramer on Polythiophene Chain: Structural Organization of the Product and Its Electrochemical and Spectroelectrochemical Properties

详细信息    查看全文

• 作者：Katarzyna Buga ; Agnieszka Majkowska ; Rafal Pokrop ; Malgorzata Zagorska ; David Djurado ; Adam Pron ; Jean-Louis Oddou ; and Serge Lefrant
• 刊名：Chemistry of Materials
• 出版年：2005
• 出版时间：November 15, 2005
• 年：2005
• 卷：17
• 期：23
• 页码：5754 - 5762
• 全文大小：198K
• 年卷期：v.17,no.23(November 15, 2005)
• ISSN：1520-5002

文摘

We describe the preparation of solution-processible hybrid polymers, consisting of a polythiophenemain chain and randomly distributed alkyl and oligoaniline side groups. The proposed procedure involvesthree steps: copolymerization of alkyl- and ester-group-substituted thiophenes to give the precursorpolymer, followed by the hydrolysis of the pendant ester groups and aniline tetramer grafting through anamidation reaction. The proposed method is more versatile than previously used copolymerizationprocedures because higher tetraaniline grafting levels can be obtained. The postfunctionalized polymeris electrochemically active both in its oligoaniline part and in its conjugated polythiophene main chain.As shown by complementary voltammeric and UV-vis-NIR and Raman spectroelectrochemical studies,the polymer can be electrochemically doped selectively in its side oligoaniline chains or globally in themain chain as well as in the side chains. Selective side-chain doping can also be achieved chemicallythrough protonation of the grafted oligoaniline groups in their semi-oxidized state. Doping with FeCl₃ isglobal and involves the oxidation of the main chain and Lewis acid complexation of the side chains, asshown by Mössbauer spectroscopy.