8.2.5 Detection of Zn2+ Ions Using a Novel Chemosensor Based on Coumarin Schiff-base Derivatives by Electrochemical and Fluorescence Spectroscopy

Binu B. Narakathu, Massood Z. Atashbar, Fasil A. Abebe, Carla S. Eribal & Ekkehard Sinn
We report on the dual detection of zinc ions (Zn2+), using a novel coumarin-based fluorescent chemosensor 7-(diethylamino)-3-((2-hydroxy-4-methylphenylimino) methyl)-2H-chromen-2-one (DHMMC), by using electrochemical and fluorescence based spectroscopy techniques. An efficient electrochemical sensor which consists of gold (Au) interdigitated electrodes (IDE) on a glass substrate was used to perform electrical impedance spectroscopy (EIS) for quantitative detection of Zn2+. Picomolar level detection of Zn2+ was made possible by EIS in the presence of DHMMC. Selective detection of Zn2+...