title: A simple but highly sensitive and selective colorimetric and fluorescent probe for Cu2+ in aqueous media.
abstract: In this paper, CN-DPA was prepared as an effective colorimetric and fluorescent probe for copper ions (Cu(2+)) in aqueous solution. It exhibits good sensitivity and selectivity for Cu(2+) over other metal ions both in aqueous solution and on a simple colorimetric paper-made test kit. Upon addition of Cu(2+), a remarkable color change from purple to colorless was easily observed by the naked eye, and a fluorescence quenching was also determined. Furthermore, CN-DPA can be used to quantitatively detect Cu(2+). The linear range was 0-5 μM determined by absorption spectrometry. All these selective and sensitive results indicate that CN-DPA could meet the selective requirements for biomedical and environmental application and be sensitive enough to detect Cu(2+) in environmental water samples, even in drinking water, which has a limit of 20 μM defined by the U.S. Environmental Protection Agency.
authors.affiliation: Key Laboratory of Cluster Science of Ministry of Education, Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
authors.forename: Yamin
authors.initials: Y
authors.lastname: Li
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Zhang
authors.forename: Baocun
authors.initials: B
authors.lastname: Zhu
authors.forename: Juan
authors.initials: J
authors.lastname: Xue
authors.forename: Zhi
authors.initials: Z
authors.lastname: Zhu
authors.forename: Weihong
authors.initials: W
authors.lastname: Tan
mesh_terms: D000588:Amines / Q000737:chemistry; D002413:Cations, Divalent; D003124:Colorimetry / Q000379:methods; D003300:Copper / Q000032:analysis* / Q000737:chemistry; D005027:Ethylene Oxide / Q000031:analogs & derivatives / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D010848:Picolinic Acids / Q000737:chemistry; D012680:Sensitivity and Specificity; D012996:Solutions / Q000737:chemistry; D013054:Spectrophotometry, Atomic / Q000379:methods; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: C501847:2,2'-dipicolylamine; D000588:Amines; D002413:Cations, Divalent; D005456:Fluorescent Dyes; D010848:Picolinic Acids; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; C033154:2-cyanoethylene oxide; D003300:Copper; D005027:Ethylene Oxide