title: A single molecule that acts as a fluorescence sensor for zinc and cadmium and a colorimetric sensor for cobalt.
abstract: A new metal ion sensor that contains quinoline and pyridylaminophenol has been synthesized. In acetonitrile and in the presence of Zn(2+), the sensor fluoresces. In contrast, in aqueous solutions the sensor fluoresces in the presence of Cd(2+). The fluorescence of the molecule is selective for Zn(2+) or Cd(2+) and shows no fluorescence with other metal ions. The crystal structure of the Cd(2+) complex shows coordination through the amide and phenol oxygens, as well as the amine nitrogen of the sensor. The sensor also acts as a colorimetric sensor for Co(2+) by changing color from colorless to yellow. The color change is selective for Co(2+) and is not observed with other metal ions. The unique combination of pyridine and phenol groups with quinoline results in the properties of this sensor.
authors.affiliation: Department of Fine Chemistry, Seoul National University of Science & Technology, Seoul 139-743, Korea. chealkim@seoultech.ac.kr.
authors.forename: Eun Joo
authors.initials: EJ
authors.lastname: Song
authors.forename: Juhye
authors.initials: J
authors.lastname: Kang
authors.forename: Ga Rim
authors.initials: GR
authors.lastname: You
authors.forename: Gyeong Jin
authors.initials: GJ
authors.lastname: Park
authors.forename: Youngmee
authors.initials: Y
authors.lastname: Kim
authors.forename: Sung-Jin
authors.initials: SJ
authors.lastname: Kim
authors.forename: Cheal
authors.initials: C
authors.lastname: Kim
authors.forename: Roger G
authors.initials: RG
authors.lastname: Harrison
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D002104:Cadmium / Q000737:chemistry*; D003035:Cobalt / Q000032:analysis*; D003124:Colorimetry; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry; D018360:Crystallography, X-Ray; D005456:Fluorescent Dyes / Q000737:chemistry*; D008968:Molecular Conformation; D011804:Quinolines / Q000138:chemical synthesis / Q000737:chemistry; D014867:Water / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*
chemical_list: D000097:Acetonitriles; D056831:Coordination Complexes; D005456:Fluorescent Dyes; D011804:Quinolines; D002104:Cadmium; D014867:Water; D003035:Cobalt; C037219:quinoline; D015032:Zinc; C032159:acetonitrile