Synthesis, Characterization and Self-Assembly of PEG-Aniline Tetramer Block Copolymer

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (2): 411.

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Synthesis, Characterization and Self-Assembly of PEG-Aniline Tetramer Block Copolymer

LANG Le^1,2, ZHUANG Xiu-Li¹, LIU Ya-Dong^1,2, ZHANG Pei-Biao¹, CHEN Xue-Si^1*, WEI Yan^3*

1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China;
3. Department of Chemistry, Drexel University, Philadelphia, PA 19104, USA

Received:2010-03-17 Revised:2010-04-08 Online:2010-02-10 Published:2011-02-23
Contact: CHEN Xue-Si;WEI Yan E-mail:xschen@ciac.jl.cn;weiyen@drexel.edu
Supported by:
国家自然科学基金(批准号: 50773081, 50733003, 50425309)和国家“八六三”计划项目(批准号: 2007AA03Z320)资助.

Abstract

Abstract: An electroactive block copolymer consisting of methoxy poly(ethylene glycol) (mPEG) and aniline tetramer (AT), mPEG-AT, was synthesized via condensation in the presence of N,N’-dicyclohexylcarbodiimide (DCC). The chemical structure of the copolymer was confirmed by 1H-NMR and FTIR. UV-Vis and cyclic voltammogram methods were used to evaluate the electroactivity of the block copolymer. The particle size was measured by ESEM and DSL methods. The spherical aggregates with diameter of about 125 nm were observed by self-assembly method when the copolymer was dissolved in water. The diameter of spherical aggregates would alter as the variation of aqueous pH when the AT segment was oxidized to its emeraldine form. The possible mechanism of self-assembly of the block copolymer and the pH- sensitivity were discussed.

Key words: Aniline tetramer, PEG, Block copolymer, Electroactive, Self-assembly

TrendMD:

LANG Le, ZHUANG Xiu-Li, LIU Ya-Dong, ZHANG Pei-Biao, CHEN Xue-Si*, WEI Yan*. Synthesis, Characterization and Self-Assembly of PEG-Aniline Tetramer Block Copolymer[J]. Chem. J. Chinese Universities, 2011, 32(2): 411.

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Synthesis, Characterization and Self-Assembly of PEG-Aniline Tetramer Block Copolymer

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