Studies on the Polarographic Reduction of Poly-m-xylylviologen Dibromide in Water |
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| Authors: | B B Prasad |
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| Institution: | Analytical Division Chemistry Department Faculty of Science , Banaras Hindu University , Varanasi , 221005 , India |
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| Abstract: | Polarographic studies on aqueous solutions of the redox polyelectrolyte poly-m-xylylviologen dibromide were carried out in the 1.70–7.90 pH range. The compound revealed two well-defined, diffusion-controlled cathodic waves with half-wave potentials of -0.482 and -0.906 V vs SCE. The electrode processes were found to be irreversible and independent of pH. The system did not conform to the protonation equilibrium (PXVBr2 + H+?PXVBr2H+) in contrast to its ortho and para isomeric compounds. A suitable mechanism for the reduction processes is suggested. |
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