Highly selective visual detection of Cu(II) utilizing intramolecular hydrogen bond-stabilized merocyanine in aqueous buffer solution.
A Cu(2+)-specific colorimetric sensor 1, which is stabilized by an intramolecular hydrogen bonding, was designed and developed. The color of 1 changes from purple to blue on addition of 1.0 muM Cu(2+) in aqueous buffer solution, which can be detected by the naked eye. The analytical detection limit for Cu(2+) by the naked eye is as low as 1.0 muM. The stoichiometry for 1 and Cu(2+) in complex is 2:1 in aqueous solution.
Guo
Zhao-Qi
ZQ
Laboratory of Organic NanoPhotonics and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Beijing 100190, China.
Chen
Wei-Qiang
WQ
Duan
Xuan-Ming
XM
D001578:Benzopyrans / Q000737:chemistry*; D002021:Buffers; D003124:Colorimetry; D004396:Coloring Agents / Q000737:chemistry*; D003300:Copper / Q000032:analysis*; D006860:Hydrogen Bonding; D007211:Indoles / Q000737:chemistry*; D015394:Molecular Structure; D012996:Solutions; D014867:Water / Q000737:chemistry
D001578:Benzopyrans; D002021:Buffers; D004396:Coloring Agents; D007211:Indoles; D012996:Solutions; C548873:merocyanine; D014867:Water; D003300:Copper