A new Schiff-base chemosensor for selective detection of Cu2+ and Co2+ and its copper complex for colorimetric sensing of S2- in aqueous solution

被引:60
作者
Kim, Min Seon
Lee, Seong Youl
Jung, Jae Min
Kim, Cheal [1 ]
机构
[1] Seoul Natl Univ Sci & Technol, Dept Fine Chem, Seoul 139743, South Korea
基金
新加坡国家研究基金会;
关键词
EFFECTIVE CORE POTENTIALS; NEAR-INFRARED FLUORESCENCE; SEQUENTIAL DETECTION; MOLECULAR CALCULATIONS; RELAY RECOGNITION; METAL-IONS; SENSOR; SULFIDE; PROBE; COBALT;
D O I
10.1039/c7pp00229g
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A new Schiff-base colorimetric chemosensor 1 was developed for the detection of Cu2+, Co2+ and S2-. Sensor 1 could simply monitor Cu2+ and Co2+ by a color change from colorless to yellow. The binding modes of 1 to Cu2+ and Co2+ were determined to be a 2 : 1 complexation stoichiometry through Job's plot and ESI-mass spectrometry analysis. The detection limits (0.02 mu M and 0.63 mu M) for Cu2+ and Co2+ were lower than the recommended values (31.5 mu M and 1.7 mu M) by the World Health Organization (WHO) for Cu2+ and the Environmental Protection Agency (EPA) for Co2+, respectively. Importantly, 1 could detect and quantify Cu2+ in real water samples. In addition, the Cu2+-2.1 complex could be used as a highly selective colorimetric sensor for S2- in the presence of other anions without any interference. Moreover, the sensing mechanisms of Cu2+ and Co2+ by 1 were explained by theoretical calculations.
引用
收藏
页码:1677 / 1689
页数:13
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