Solid state NMR characterization of polyrrole : the nature of the dopant in PF6− doped films

Forsyth, Maria and Smith, Mark E. 1993, Solid state NMR characterization of polyrrole : the nature of the dopant in PF6− doped films, Synthetic metals, vol. 55, no. 1, pp. 714-719.

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Title Solid state NMR characterization of polyrrole : the nature of the dopant in PF6− doped films
Formatted title Solid state NMR characterization of polyrrole : the nature of the dopant in PF6− doped films
Author(s) Forsyth, Maria
Smith, Mark E.
Journal name Synthetic metals
Volume number 55
Issue number 1
Start page 714
End page 719
Publisher Elsevier S.A.
Place of publication Basel, Switzerland
Publication date 1993-03-15
ISSN 0379-6779
Keyword(s) solid state NMR
polypyrrole
hexafluorophosphate
Summary 31P and 19F solid state NMR have been used to study the nature of the PF6− anion in polypyrrole films at various levels of oxidation. It appears that the symmetric PF6− unit remains undistorted and unchanged throughout, suggesting that it is predominantly acting only as a counterion and not as a true ‘dopant’, since any distortion in the phosphorous environments would result at the very least in chemical shift anisotropy of the 31P nucleus. A second set of phosphorous and fluorine resonances, which are consistent with a difluoride phosphorous compound, appeared in the films. Upon electrochemical reduction of the polymer, the undistorted PF6− anion leaves the film whereas the second phosphorous species remains. Re-oxidation of the polymer reverses the processes observed during reduction.
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 ©1993, Elsevier Sequoia
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030142

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