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http://dx.doi.org/10.5012/jkcs.2015.59.5.423

Effects of Binary Doping on Chiroptical, Electrochemical, and Morphological Properties of Chiral Polyaniline  

Kim, Eunok (Department of Chemistry, The University of Suwon)
Publication Information
Journal of the Korean Chemical Society / v.59, no.5, 2015 , pp. 423-428 More about this Journal
Abstract
(1S)-(+)-10-camphorsulfonic acid (CSA) and HCl were used together as a binary dopant in the electrodeposition of polyaniline (PAni). (+)-CSA and HCl were added in different mole ratios (9:1 and 6:4). (+)-CSA-doped and binary-doped PAni exhibited markedly different ultraviolet-visible and circular dichroism spectral characteristics due to differences in their conformations. Distinct helical structures are observed in the scanning electron microscopy images of (+)-CSA-doped PAni. The X-ray diffraction pattern of (+)-CSA-doped PAni exhibited remarkably higher crystallinity than that of HCl-doped PAni which is associated with the helical ordering along the polymer chains. The conformational changes due to the binary doping in chiral PAni had a significant effect on its chiroptical and electrochemical properties, morphology, and crystallinity, thus determined its conductivity.
Keywords
Conducting polymers; Chiral polyaniline; Helical structures; Electrodeposition; Binary doping;
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