Polarography of flavone and quercetin

Karimganj College, Karimganj-788 710, India

Chemistry Department, University of Delhi, Delhi-110 007, India

Manuscript received 10 February 1998, revised 3 December 1998, accepted 8 December 1998

Electro-reduction behaviour of flavone (1,4-benzopyrone) and quercetin (3,5,7,3',4'-pentahydroxy-1,4-benzopyrone) are reported over the entire pH-range using DC, AC and Kalousek polarographic methods, CV and controlled potential coulometry (stirred Hg pool cathode). Products of controlled potential electrolysis have been identified. Heterogeneous rate constants have been computed and reduction schemes proposed.