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Author Winokur, M. J. ♦ Mattes, B. R.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ POLYMERS ♦ MOLECULAR STRUCTURE ♦ ANILINE ♦ AMORPHOUS STATE ♦ X-RAY SPECTRA ♦ STRUCTURE FUNCTIONS ♦ CHARGE TRANSPORT ♦ SHORT-RANGE ORDER ♦ HYDROGEN BONDS
Abstract The short-range order within amorphous polyaniline ({ital a}-PANI) has been studied through use of a pair-distribution-function analysis of x-ray scattering data in combination with quantitative refinements of model structure functions. Both the emeraldine base and salt (ES) forms of {ital a}-PANI are less planar than their crystalline counterparts. Direct evidence for appreciable interchain hydrogen bonding is seen. A probable position of the dopant ions in hydrohalogenic-acid-doped ES has also been ascertained. The intrachain structure and the ion location are such that the effective {pi}-conjugation length is lowered and the chain-to-chain packing is frustrated. These characteristics hinder charge transport through the polymer matrix and prevent evolution towards a metallic state. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-11-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 18


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