Highly sensitive and selective naked-eye detection of Cu2+ in aqueous medium by a ninhydrin-quinoxaline derivative

被引：77
作者：
Kumar, Ajit [1 ]
Kumar, Virendra [1 ]
Diwan, Uzra [1 ]
Upadhyay, K. K. [1 ]
机构：
[1] Banaras Hindu Univ, Fac Sci, Dept Chem, Ctr Adv Study, Varanasi 221005, Uttar Pradesh, India
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2013年 / 176卷
关键词：
Ninhydrin; Quinoxaline; Naked-eye sensor; Cu2+ ion; Aqueous medium; FLUORESCENT CHEMOSENSOR; METAL-IONS; COPPER; PROBE; SENSORS; EFFICIENT; CU(II);
D O I：
10.1016/j.snb.2012.09.089
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A simple ninhydrin-quinoxaline based colorimetric receptor 1 was designed, synthesized and characterized. The same exhibited high sensitivity and selectivity towards Cu2+ in aqueous medium (ethanol:H2O, 1:9, v/v) over a wide variation of cations such as Na+, Mg2+, Al3+, Co2+, Fe3+, Ni2+, Zn2+, Cd2+, Hg2+ and Pb2+. The addition of Cu2+ to the receptor 1 solution gave clear colour change from olive green to pink. The detection limit of receptor 1 was found to be 3.43 x 10(-7)M which is probably the lowest one for the Cu2+ in an aqueous solution by any naked-eye receptor till date. The sensitivity and specificity of receptor 1 towards Cu2+ along with control compound receptor 2 were investigated in detail. This is only the second report where ninhydrin is used for the construction of any colorimetric sensor. (C) 2012 Elsevier B.V. All rights reserved.
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页码：420 / 427
页数：8
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