title: Fluorescence turn-on sensor for cyanide based on a cobalt(II)-coumarinylsalen complex.
abstract: A Co(II)-salen based fluorescent sensor (1.Co) that can selectively recognize cyanide anions in 1:2 binding stoichiometry over other anions has been developed. 1.Co displayed fluorescence enhancement upon the addition of cyanide owing to the interruption of photoinduced electron transfer from the coumarin fluorophore to the cobalt(II) ion. A general regression method was developed to calculate the binding constants in the 1:2 binding system, through which the 1:2 binding between 1.Co and cyanide anions was estimated to be in the range of micromolar dissociation constants.
authors.affiliation: Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea.
authors.forename: Jae Han
authors.initials: JH
authors.lastname: Lee
authors.forename: A Reum
authors.initials: AR
authors.lastname: Jeong
authors.forename: Ik-Soo
authors.initials: IS
authors.lastname: Shin
authors.forename: Hae-Jo
authors.initials: HJ
authors.lastname: Kim
authors.forename: Jong-In
authors.initials: JI
authors.lastname: Hong
mesh_terms: D000838:Anions; D003035:Cobalt / Q000737:chemistry*; D003374:Coumarins / Q000138:chemical synthesis* / Q000737:chemistry; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D009570:Nitriles / Q000032:analysis*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D013050:Spectrometry, Fluorescence
chemical_list: D000838:Anions; D003374:Coumarins; D005456:Fluorescent Dyes; D009570:Nitriles; D009942:Organometallic Compounds; D003035:Cobalt