title: Simple and sensitive colorimetric sensors for the selective detection of Cu2+ in aqueous buffer.
abstract: Simple chromogenic sensor for the selective detection of Cu(2+) was described. With the addition of Cu(2+), a bathochromic shift about 82 nm was observed in the UV-VIS spectra, with the color change from colorless to bright yellow. This suggested that the coordination between receptor and Cu(2+) was formed, and the strong push-pull system occurred. The followed IR spectra indicated that Cu(2+) coordinated to the two phenolic oxygen atoms and one of two azomethines in the receptor.
authors.affiliation: Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China.
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Huo
authors.forename: Kai
authors.initials: K
authors.lastname: Liu
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Zhao
authors.forename: Xingxing
authors.initials: X
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D015374:Biosensing Techniques; D003124:Colorimetry; D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000032:analysis* / Q000737:chemistry; D005456:Fluorescent Dyes; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013882:Thiosemicarbazones / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D056831:Coordination Complexes; D005456:Fluorescent Dyes; D013882:Thiosemicarbazones; C512188:azomethine; D014867:Water; D003300:Copper; D010100:Oxygen
keywords: Colorimetric sensor; Cu(2+); Naked-eye cation detection; Ratiometric detection