About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Synthetic Metals
Paper
Aggregation and interchain "self" doping in emeraldine base
Abstract
We report gel permeation chromatography, electron paramagnetic resonance and optical absorption measurements on the emeraldine base (EB) form of polyaniline synthesized using different oxidant/aniline ratios in the range of 0.25 to 1.0. A concentration of localized paramagnetic defects and sub bandgap absorption is observed which correlate with the fraction of aggregated EB suggesting that radical formation is occurring within the aggregates. This correlation is observed in EB synthesized at different oxidant/aniline ratios and in heat treated EB. Further, we propose that interchain interactions within the aggregates give rise to a form of "self" doping in EB.