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Colorimetric Detection of Copper(II) Ions Using Schiff‐Base Derivatives
Author(s) -
Aydin Ziya,
Keles Mustafa
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001041
Subject(s) - schiff base , detection limit , aniline , chemistry , metal ions in aqueous solution , copper , acetonitrile , stoichiometry , absorbance , ion , metal , selectivity , base (topology) , nuclear chemistry , analytical chemistry (journal) , inorganic chemistry , polymer chemistry , chromatography , organic chemistry , catalysis , mathematical analysis , mathematics
Two new Schiff base derivatives N,N‐dimethyl‐4‐((2‐(phenylthio) phenyl)imino)propenyl)aniline ( CSP ) and 2‐(4‐(dimethylamino)phenyl) allylidene) amino)benzenethiol ( CSH ) were synthesized. Sensing mechanism of the sensors was investigated using UV‐Vis spectroscopy in the presence of various metal ions. The sensor CSP shows high sensitivity and selectivity to Cu 2+ over a wide range of other metal ions in acetonitrile (ACN)/water (H 2 O) (v/v 2 : 1). The sensor CSP can detect Cu 2+ ions by color change from yellow to pink. The complex stoichiometry between the sensor, CSP , and Cu 2+ was found to be 2 : 1 and the binding constant was calculated to be 2.40 × 10 10 M −2 . The absorbance detection limit of CSP for Cu 2+ was determined as 2.85 × 10 −6 M. The sensor, CSP , was also applied to real samples successfully.