Electrochemical Preparation of Chiral Polyaniline Nanofibers

doi:10.7503/cjcu20120239

Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (11): 2501.doi: 10.7503/cjcu20120239

• Physical Chemistry • Previous Articles Next Articles

Electrochemical Preparation of Chiral Polyaniline Nanofibers

WENG Shao-Huang², ZHOU Jian-Zhang¹, LIN Zhong-Hua¹, LIN Xin-Hua²

1. State Key Laboratory of Physical Chemistry of the Solid Surface, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;
2. Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350004, China

Received:2012-03-19 Online:2012-11-10 Published:2012-10-15
Contact: Jian-Zhang ZHOU E-mail:jzzhou@xmu.edu.cn

Abstract

Abstract:

Chiral polyaniline(PANI) nanofibers were synthesized via facilely potentiostatic electropolymerization method without template in the presence of (1S)-(+)-camphor-10-sulfonic acid(D-CSA) or (1R)-(-)-camphor-10-sulfonic acid(L-CSA) as the dopant. The morphology and optical property of chiral PANI nanofibers were characterized with scanning electron microscopy(SEM), transmission electron microscopy(TEM), UV-Vis spectrum(UV-Vis) and circular dichroism(CD). Combined with the average diameter of micelles and zeta-potential of different deposition solutions, the formation mechanism and the enhanced optical activity of the optical PANI nanofibers were studied. The morphology of PANI nanofibers without the helical structure was consistent with the change of the concentration of aniline in the deposition solution when the concerntion of CSA was 1 mol/L. Furthermore, the chiral PANI nanofibers induced by different chiral CSA exhibited mirror-imaged circular dichroism spectra with high ellipticity, indicating the stereochemical selectivity of the molecular structure of PANI chain in the electrodeposited process. The colors and optical activities of the chiral PANI nanofibers not only can be kept with the chemical dedoping/redoping treatment, but also can reversibly varied with the different oxidized forms which were controlled via electrochemical route.

Key words: Electropolymerization, Polyaniline(PANI) nanofiber, Chiral, Circular dichroism spectrum, Stereochemical selectivity

CLC Number:

O646

TrendMD:

WENG Shao-Huang, ZHOU Jian-Zhang, LIN Zhong-Hua, LIN Xin-Hua. Electrochemical Preparation of Chiral Polyaniline Nanofibers[J]. Chem. J. Chinese Universities, 2012, 33(11): 2501.

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Electrochemical Preparation of Chiral Polyaniline Nanofibers

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