Tuning of Electronic Properties in Conducting Polymers

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Title:Tuning of Electronic Properties in Conducting Polymers
Creators:
Li, Guofeng
Josowicz, Mira
Janata, Jiří
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 66, 8, pp. 1208-1218
Uncontrolled Keywords:PPSA, Perchlorate, Electronic Properties, Cyclic voltammetry, Conducting polymers, Electrochemistry, Poly(phenylenesulfidephenyleneamine), Electrochemical doping

Abstract

Structural and electronic transitions in poly(thiophenyleneiminophenylene), usually referred to as poly(phenylenesulfidephenyleneamine) (PPSA) upon electrochemical doping with LiClO<sub>4</sub> have been investigated. The unusual electrochemical behavior of PPSA indicates that the dopant anions are bound in two energetically different sites. In the so-called "binding site", the ClO<sub>4</sub><sup>-</sup> anion is Coulombically attracted to the positively charged S or N sites on one chain and simultaneously hydrogen-bonded with the N-H group on a neighboring polymer chain. This strong interaction causes a re-organization of the polymer chains, resulting in the formation of a networked structure linked together by these ClO<sub>4</sub><sup>-</sup> Coulombic/hydrogen bonding "bridges". However, in the "non-binding site", the ClO<sub>4</sub><sup>-</sup> anion is very weakly bound, involves only the electrostatic interaction and can be reversibly exchanged when the doped polymer is reduced. In the repeated cycling, the continuous and alternating influx and expulsion of ClO<sub>4</sub><sup>-</sup> ions serves as a self-organizing process for such networked structures, giving rise to a diminishing number of available "non-binding" sites. The occurrence of these ordered structures has a major impact on the electrochemical activity and the morphology of the doped polymer. Also due to stabilization of the dopant ions, the doped polymer can be kept in a stable and desirable oxidation state, thus both work function and conductivity of the polymer can be electrochemically controlled. <p>

Title:Tuning of Electronic Properties in Conducting Polymers
Creators:
Li, Guofeng
Josowicz, Mira
Janata, Jiří
Uncontrolled Keywords:PPSA, Perchlorate, Electronic Properties, Cyclic voltammetry, Conducting polymers, Electrochemistry, Poly(phenylenesulfidephenyleneamine), Electrochemical doping
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:66
Number:8
Page Range:pp. 1208-1218
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20011208UNSPECIFIED
ID Code:1851
Item Type:Article
Deposited On:06 Feb 2009 17:13
Last Modified:06 Feb 2009 16:13

Citation

Li, Guofeng; Josowicz, Mira; Janata, Jiří (2001) Tuning of Electronic Properties in Conducting Polymers. Collection of Czechoslovak Chemical Communications, 66 (8). pp. 1208-1218. ISSN 0010-0765

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