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XPS Study Of Self-doped Conducting Polyaniline And Parent Systems
Published 1991 · Chemistry
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The structure and protonation level of sulfonated polyaniline as well as the chemically synthesized emeraldine base and its chloride salt have been investigated. The XPS results indicate that ∼ 50% of the phenyl rings of the sulfonated polyaniline have a hydrogen atom substituted by a -SO 3 H group. Approximately 50% of the nitrogen sites are protonated in this self-doped conducting polymer. The protonation level remains unchanged upon exposure to high vacuum at room temperature. In contrast, emeraldine hydrochloride undergoes partial deprotonation and probably reduction as well under high-vacuum conditions