Fluorimetric Recognition of Nerve Agent Mimic Diethylchlorophosphate Along with Cu/Hg Ions Using Imidazole Possessing Sensor.

An imidazole possessing sensor (1) has been designed and developed by simple one step reaction and characterization was done by using common spectroscopic methods. The fluorimetric sensing of nerve agent mimic, DCP, was carried out by observing blue shift in spectra accompanied with quenching in semi-aqueous solvent. The sensor was found proficient for the detection of DCP amongst other phosphates with detection limit of 69 nM.

Uracil-Appended Fluorescent Sensor for Cu and Hg Ions: Real-Life Utilities Including Recognition of Vitamin B (Riboflavin) in Milk Products and Invisible Ink Applications.

A simple uracil-appended fluorescent sensor (1) has been developed by one pot reaction and characterized by using common spectroscopic methods such as UV-vis, Fluorescence, HRMS and FT-IR analyses. Upon addition of various metal ions to the CHCN solution of sensor 1, the fluorescence was quenched in the presence of Cu / Hg ions. The limit of detection for Cu and Hg was calculated to be 3.

Multianalyte azo dye as an on-site assay kit for colorimetric detection of Hgions and electrochemical sensing of Zn ions.

A new tailor-made colorimetric chemosensor, (E)-1-(benzo[d]thiazol-2-yl)-3-(pyridin-3-yldiazenyl)naphthalen-2-ol (1), containing benzothiazole and pyridine moieties connected through an azo (-N=N-) linkage has been designed and synthesized. The synthesized chemosensor displayed an eye-catching color change upon binding to acetate [AcO;colorless to russet] and mercury (II) [Hg;colorless to greenish blue] ions in 9:1 (v/v) aqueous CHCN (pH 7.0 HEPES buffer).

"Switch on" fluorescent sensor for the detection of fluoride ions in solution and commercial tooth paste.

A simple and novel uracil based chemosensor (1) has been developed by one step reaction, which selectively detected F ions via "switch on" fluorescence mode. Upon the addition of F ion to CHCN solution of 1, the non-fluorescent probe became highly fluorescent, showing a color change from colorless to fluorescent blue, when irradiated with 280nm light. H NMR studies revealed the binding sites of chemosensor 1, where C-5 hydrogen and amine hydrogens formed hydrogen bonding with F ion.