• G MADHU

      Articles written in Journal of Chemical Sciences

    • A ninhydrin–thiosemicarbazone based highly selective and sensitive chromogenic sensor for Hg2+ and F- ions

      V RAJU R SELVA KUMAR S K ASHOK KUMAR G MADHU SHILPA BOTHRA SUBAN K SAHOO

      More Details Abstract Fulltext PDF

      This study demonstrates the design, synthesis and sensing applications of a simple and efficient chemosensor, 2-(1,3-dioxo-1H-inden-2(3H)-ylidene)hydrazinecarbothioamide (R) for quick detection of Hg2+ and F- in aqueous media using a colorimetric test, UV–Vis spectral analysis, and silica gel support Sensor R showed the typical absorption peak at 305 nm for Hg2+ which is responsible for color change from yellow to colorless, while in the case of F-, R exhibits a major peak at 415 nm and a color change from yellow to red. The limit of detection (LOD) of R for the analysis of Hg2+ was calculated as 1x10-6 M while for F-, it was found to be 3.4x10-7 M. The binding modes of R with Hg2+ and F- have been investigated by the Job’s plot, Benesi–Hildebrand (BH) method, 1H NMR, FTIR and theoretical studies. The sensor R was reversible after treating it with reagents such as EDTA and calcium nitrate solution after contacting with Hg2+ and F-, respectively. The performance of R can be successfully applied for the analysis of F- contents present in toothpastes

  • Journal of Chemical Sciences | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.