Journal of Chemistry

Journal of Chemistry / 2009 / Article

Open Access

Volume 6 |Article ID 375684 |

P. Vijaybhaskar, A. Ramachandraiah, "Spectral and Electrochemical Studies of Phenazopyridine", Journal of Chemistry, vol. 6, Article ID 375684, 7 pages, 2009.

Spectral and Electrochemical Studies of Phenazopyridine

Received03 Mar 2009
Accepted04 Apr 2009


The spectral and voltammetric behavior of phenazopyridine (1) in aqueous buffers of varied pH is presented. Spectrophotometry, cyclic voltammetry, differential pulse polarography and coulometry were utilized to study its proton and electron transfer characteristics. Relevant thermodynamic and electrochemical data such as pKa, charge transfer co-efficient (αna), forward rate constant (k0f,h), etc., have been evaluated. An excellent electroanalytical method of assaying of 1 has been developed in differential pulse polarography at pH = 8. Molecular modeling on various acid-base conjugates of 1 and their several conformers has been carried out to arrive at the thermodynamic and conformational issues to correlate the spectral and electrochemical observations.

Copyright © 2009 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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