Colorimetric test kit for Cu2+ detection.
A coumarin-based colorimetric chemosensor 1 was designed and synthesized. It exhibits good sensitivity and selectivity for the copper cation over other cations such as Zn(2+), Cd(2+), Pb(2+), Co(2+), Fe(2+), Ni(2+), Ag(+), and alkali and alkaline earth metal cations both in aqueous solution and on paper-made test kits. The change in color is very easily observed by the naked eye in the presence of Cu(2+) cation, whereas other metal cations do not induce such a change. The quantitative detection of Cu(2+) was preliminarily examined.
Laboratory of Organic Optoelectronic Functional Materials and Molecular Engineering, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing, 100190, China.
Ruilong
R
Sheng
Pengfei
P
Wang
Yunhua
Y
Gao
Yan
Y
Wu
Weimin
W
Liu
Jingjin
J
Ma
Huaping
H
Li
Shikang
S
Wu
D002413:Cations, Divalent / Q000737:chemistry; D003124:Colorimetry / Q000379:methods*; D003300:Copper / Q000032:analysis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D017186:Titrimetry
D002413:Cations, Divalent; D003300:Copper