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An effective colorimetric sensor for detecting Cu 2+ based on benzothiazole moiety
Author(s) -
Suh Boeon,
Choe Donghwan,
Kim Cheal
Publication year - 2021
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/cote.12548
Subject(s) - benzothiazole , moiety , chemistry , bathochromic shift , ligand (biochemistry) , metal ions in aqueous solution , electrospray ionization , metal , ion , photochemistry , fluorescence , stereochemistry , organic chemistry , biochemistry , physics , receptor , quantum mechanics
An effective colorimetric chemosensor, 2,4‐dichloro‐6‐((E)‐(((Z)‐3‐methylbenzo[d]thiazol‐2(3H)‐ylidene)hydrazono)methyl)phenol (HMD), was synthesised for Cu 2+ detection. HMD with benzothiazole moiety showed a large bathochromic shift (153 nm) and a definite colour change for Cu 2+ . HMD could detect Cu 2+ down to 0.47 μmol/L in the solution phase and could clearly distinguish it from other metal ions, even in the test strip. The binding mode between HMD and Cu 2+ was determined to be 1:1 using Job plot and electrospray ionisation mass spectrometry. The sensing mechanism of HMD for Cu 2+ was illustrated as the combination of metal‐to‐ligand charge transfer and intramolecular charge transfer via theoretical calculation.