So Young Kim, Seong Youl Lee, Jae Min Jung
Feb 24, 2018
Citations
0
Influential Citations
12
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract A multifunctional colorimetric chemosensor 1, based on 4-(diethylamino)-2-hydroxybenzaldehyde and 2,3-diamino-5-bromopyridine, has been synthesized and characterized. Sensor 1 detected instantly both Cu2+ and S2− by the color change from pale yellow to deep yellow. The binding modes of 1 with Cu2+ and S2− were found to be the 1:1 stoichiometry through Job plot and ESI-mass spectrometry analysis, respectively. In addition, the detection limit of 1 for Cu2+ was found to be 68.6 nΜ, which was much lower than WHO guideline (31.5 µΜ) in drinking water. Importantly, sensor 1 could be used to quantify Cu2+ in water samples. Moreover, 1 exhibited a high selectivity for S2− in the presence of other anions. The sensing mechanisms of Cu2+ and S2− by 1 were explained by theoretical calculations.