Highly Selective and Sensitive Colorimetric and Fluorescent Chemosensor for Rapid Detection of Ag+, Cu2+ and Hg2+ Based on a Simple Schiff Base

Abstract

A new reversible colorimetric and fluorescent chemosensor MMIP based on a simple Schiff base has been successfully synthesized. MMIP exhibited high selectivity and sensitivity towards Ag, Cu and Hg ions with a short response time in DMSO/HO (1/1, v/v) solution among various metal ions, and the results could be monitored directly by naked eyes. The binding stoichiometry between MMIP and Ag/Hg/Cu has been determined to be 1:2 by Job's plot and FT-IR analysis. MMIP could effectively detect Ag, Cu and Hg over a wide pH range of 3-10. The good linear correlations were obtained in the concentration ranges of 0-20 μM for Ag, Cu and Hg. Thus sensor MMIP could be potentially used for the quantification of Ag, Cu and Hg in aqueous solution.

Platinum Nanoparticle in Tantalum Electrode for the Electrochemical Analysis of Heavy Metal Ions Formed by the Ion Beam Sputtering Deposition

“…To determine the nature of the sample between surface of electrode and Hg 2+ , Ag + and Cu 2+ , FT-IR spectra of platinum nanoparticle electrode was recorded in the presence of Hg 2+ , Ag + and Cu 2+ (Figure 8). The findings showed that the metal ion Hg 2+ , Ag + and Cu 2+ was in perfect harmony with the nanoparticulate surface Pt, and the literature published [25].…”

A selective sulphur‐containing colorimetric chemosensor for Cu2+

“…To meet the demand of colorimetric sensors that can detect easily and rapidly copper, we designed the chemosensor APTS (Scheme 1), which contains sulphur in its structure. Sulphur is well known to have a high affinity to Cu 2+ , Ag + and Hg 2+ , and a number of sulphur‐containing sensors have been reported to detect the three metals . In order to selectively detect only Cu 2+ among them, we endowed the sensor APTS with a hard character by using moieties with nitrogen and oxygen atoms .…”

“…Sulphur is well known to have a high affinity to Cu 2+ , Ag + and Hg 2+ , and a number of sulphur-containing sensors have been reported to detect the three metals. [29][30][31][32] In order to selectively detect only Cu 2+ among them, we endowed the sensor APTS with a hard character by using moieties with nitrogen and oxygen atoms. [33][34][35][36] As expected, the sensor APTS detected only Cu 2+ via the colour change from colourless to yellow.…”

Application of nanostructure ZnLI2 complex in construction of optical pH sensor

“…Many types of optical chemical sensors were reported which operated based on absorbance, florescence or luminescence. In these optodes, indicator molecules due to changing analyte concentration product a signal proportional with analyte amount, accordingly detection and determination of different molecules as well as ions …”