scispace - formally typeset
Search or ask a question
Author

V. Varkey

Bio: V. Varkey is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Polarography. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.
Topics: Polarography

Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, the polarographic reduction of 4-nitro DPA in methanol-water mixtures of varying composition in the pH range 1-12 was investigated, and a single wave was observed in the reduction in these media at all pH values and solvent compositions.

5 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this paper, the electrochemical reduction of 2-nitrobenzidine (I) has been investigated in N,N-dimethylformamide solutions and two well-defined polarographic waves in the ratio 1:3 were obtained.

12 citations

Journal ArticleDOI
TL;DR: The polarographic reduction of 2,4,6-trinitro diphenylamine was found to give three waves of nearly equal height in all pH regions in buffered solutions and also in unbuffered methanol-water mixtures as mentioned in this paper.

2 citations

Journal ArticleDOI
TL;DR: In this paper, a suitable mechanism for the reduction of 2,3′-DNB in buffered methanolic solutions is proposed based on the results obtained, and the reduction is shown to transfer ten electrons in the reduction and cyclic voltammetric studies show direct proof for the existence of a nitroso intermediate.
Abstract: 2,2′-dinitrobenzidine (2,3′-DNB) gives a single diffusion-limited irreversible polarographic wave in buffered aqueous methanol. Microcoulometric experiments indicate a transfer of ten electrons in the reduction and cyclic voltammetric studies show direct proof for the existence of a nitroso intermediate. Based on the results obtained, a suitable mechanism is proposed for the reduction of 2,3′-DNB in buffered methanolic solutions.

1 citations

DOI
01 Aug 1980
TL;DR: In this paper, two six-electron diffusion-controlled irreversible waves are obtained for the polarographic reduction of 2,4-dinitrodiphenylamine (DPA) in buffered and unbuffered media in all compositions of methanol-water mixtures.
Abstract: Two six-electron diffusion-controlled irreversible waves are obtained for the polarographic reduction of 2,4-dinitrodiphenylamine (DPA) in buffered and unbuffered media in all compositions of methanol-water mixtures. Based on the polarographic and coulometric data, it is suggested that each of the nitro groups is reduced to the corresponding amine in a single stepvia the diimine intermediate to give 2,4-diamino DPA as the final product. The influence of various factors such as structure of the depolariser, pH and composition of methanol on the reduction of the compound is also discussed.
DOI
01 Oct 1986
TL;DR: In this paper, a diphenoquinone-diimine intermediate is suggested in the mechanism of 2-NB reduction in methanol-water mixtures, based on the results obtained.
Abstract: The electroreduction of 2-nitrobenzidine (2-NB) in buffered methanol-water mixtures in the composition range 20–80% (v/v) and pH range 2.80–12.00 gave a single six-electron diffusion-controlled irreversible wave. On the basis of the results obtained, a diphenoquinone-diimine intermediate is suggested in the mechanism of 2-NB reduction in methanol-water mixtures.