Structural characterization of conducting polypyrrole using 13C cross-polarization/magic-angle spinning solid-state nuclear magnetic resonance spectroscopy

Forsyth, Maria, Truong, Van-Tan and Smith, Mark E. 1994, Structural characterization of conducting polypyrrole using 13C cross-polarization/magic-angle spinning solid-state nuclear magnetic resonance spectroscopy, Polymer, vol. 35, no. 8, pp. 1593-1601.

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Title Structural characterization of conducting polypyrrole using 13C cross-polarization/magic-angle spinning solid-state nuclear magnetic resonance spectroscopy
Formatted title Structural characterization of conducting polypyrrole using 13C cross-polarization/magic-angle spinning solid-state nuclear magnetic resonance spectroscopy
Author(s) Forsyth, Maria
Truong, Van-Tan
Smith, Mark E.
Journal name Polymer
Volume number 35
Issue number 8
Start page 1593
End page 1601
Publisher Elsevier Ltd.
Place of publication Oxford, England
Publication date 1994-04
ISSN 0032-3861
1873-2291
Keyword(s) conducting polypyrrole
13C c.p.-m.a.s. n.m.r.
structural characterization
Summary 13C nuclear magnetic resonance (n.m.r.) has been used to study polypyrrole and N-substituted polypyrrole in the solid state. The extent of oxidation appears to be counterion-dependent; in particular, the quinoid structure appears favoured in the films prepared with dodecyl sulfate. Resonances associated with the quinoid unit are lost upon reduction of the polypyrrole film, which supports the idea that the quinoid structure is associated with the oxidized form of polypyrrole. N-substituted polypyrroles have a more distinct resonance at 110 ppm, which is linked to lower degrees of oxidation or charge delocalization in these systems. The decrease in conductivity of polypyrrole upon thermal ageing in air is associated with both the loss of counterion (‘thermal dedoping’) and the decomposition of the quinoid structure in the polymer backbone. There is no indication of carbonyl formation in the solid-state n.m.r. spectra obtained in the present study.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1994, Butterworth-Heinemann Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030149

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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