Asian Journal of Research in Chemistry

Shubashini K. Sripathi ¹, Subashree ¹, P. Lalitha ¹

Affiliations
1 Department of Chemistry, Avinashilingam Deemed University for Women, Coimbatore-641043, Tamilnadu, IN

Abstract

Pisonia grandis (R.Br) (grand devil's claw) (Nyctaginaceae) is a lettuce tree having anti-inflammatory, antidiabetic, diuretic, and wound healing activity. Antioxidant activity of aqueous fraction of ethanol extract of Pisonia grandis (R.Br) was analyzed by its electrochemical behavior. Cyclic voltammetry of the aqueous fraction of the ethanol extract at glassy carbon electrode with KCl as supporting electrolyte revealed a reversible and an irreversible redox reaction which is due to the presence of one or more secondary metabolites like flavonoids, phenols and tri-terpenoids having antioxidant properties.

Keywords

Pisonia grandis, Glassy Carbon Electrode, Antioxidant Activity, Cyclic Voltammetry.

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P. Arulpriya ¹, P. Lalitha ¹, S. Hemalatha ¹

Affiliations
1 Department of Chemistry, Avinashilingam Deemed University for Women, Coimbatore-43, IN

Abstract

The simple and reproducible high-performance thin-layer chromatographic method was used for the finger print study of ethyl acetate extract and dichloromethane fractionate of Samanea saman (Jacq.)Merr. Phytochemical examination of the extracts and fractionates revealed presence of significant phyto constituents. The study shows that HPTLC can be successfully used in the qualitative and quantitative determination of compounds in plant extracts. The phytochemical importance of the extracts of Samanea saman is also evident from the results.

Keywords

Samanea saman(Jacq.)Merr, HPTLC, Phytochemical Screening.

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P. Lalitha ¹, S. Sivakamasundari ¹

Affiliations
1 Department of Chemistry, Avinashilingam Deemed University for Women, Coimbatore-641043, IN

Abstract

The electro-chemical characteristics of carbonyl compounds are historically of interest. The present paper is aimed at carrying out a methodical cyclic voltammetric investigation of the peak potential values of 4-methyl-3-vinyl quinoline-2(1H) one (MVQ) in tetrahydrofuran (THF) with tetra butyl ammonium bromide (TBAB) as supporting electrolyte at glassy carbon electrode (GCE) with varying scan rate, concentration and pH. All the voltammograms showed only irreversible diffusion controlled reduction. Peak potentials vary linearly with the pH at all scan rates and concentrations.

Keywords

Cyclic Voltammetry, Electro-Reduction, Quinolone.

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