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The effect of dopant molecules on the molecular order of electrically-conducting films of polypyrrole

Mitchell, G.R., Davis, F.J. and Legge, C.H. (1988) The effect of dopant molecules on the molecular order of electrically-conducting films of polypyrrole. Synthetic Metals, 26 (3). pp. 247-257. ISSN 0379-6779

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To link to this item DOI: 10.1016/0379-6779(88)90241-X

Abstract/Summary

X-ray scattering curves have been measured for a range of electrochemically-prepared conducting polypyrrole films employing a variety of counterions in aqueous solutions. Films containing counterions based on aromatic rings exhibit an anisotropic molecular organization. The degree of anisotropy is enhanced through the use of highly planar counterions. The electrical conductivity of such films is also improved if the charge/volume ratio of the counterion is maintained at a high level. Polypyrrole films prepared using ‘spherically’ shaped counterions such as SO42− do not display such anisotropic molecular organizations, and exhibit lower electrical conductivities. The competing structural roles of the counterions within these molecular composites are discussed.

Item Type:Article
Refereed:Yes
Divisions:Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Electron Microscopy Laboratory (CAF)
ID Code:26847
Publisher:Elsevier

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