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The interactions between polypyrrole and an embedded bromophenol blue (BPB) dye at different oxidation levels and pHs were investigated. Cyclic Voltammetry, in situ UV–vis and Raman spectroelectrochemistry were used to detect electrochemical and optical changes in the BPB-doped ppy films. The acid–base equilibrium of the embedded dye was observed to be highly dependent on the applied potential and...
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