A colorimetric chemosensor for selective detection of copper ions
Ahran Kim, Ju Byeong Chae, Chang Joo Rha, Cheal Kim
Abstract
Abstract A water‐applicable hexamethylbenzene (HMB) chemosensor, (E)‐2‐((2‐hydroxy‐3‐methoxybenzylidene)amino)benzamide, displayed a selective colour change from colourless to yellow in the existence of copper ions. The detection limit was computed as 1.57 μmol/L, which is substantially lower than the World Health Organisation guideline (31.5 μmol/L) for copper ions. Probe HMB could also sense and quantify copper ions in real water samples. The coordination mode of HMB to copper ions was demonstrated through Job plot, electrospray ionisation mass spectroscopy and proton nuclear magnetic resonance titration, and was also supported by theoretical studies.
Topics & Concepts
CopperChemistryIonTitrationDetection limitMass spectrometryElectrospray ionizationInorganic chemistryChromatographyOrganic chemistryMolecular Sensors and Ion DetectionElectrochemical Analysis and ApplicationsAdvanced biosensing and bioanalysis techniques