title: A sugar-aza-crown ether-based fluorescent sensor for Cu2+ and Hg2+ ions.
abstract: A sugar-aza-crown ether (SAC)-based fluorescent sensor 4 was prepared. It contains a pyrene as the fluorophore and its fluoroionophoric properties toward transition metal ions were investigated. Chemosensor 4 exhibits highly selective recognition toward Cu(2+) and Hg(2+) ions among a series of tested metal ions in methanol solution. The association constants for 4*Cu(2+) and 4*Hg(2+) in methanol solution were calculated to be 7.4×10(1)M(-1) and 4.4×10(3)M(-1), respectively. Chemosensor 4 formed complexes with the Cu(2+) or Hg(2+) ion at a 1:1 ligand-to-metal ratio with a detection limit of 1.3×10(-4)M Cu(2+) and 1.26×10(-5)MHg(2+), respectively.
authors.affiliation: Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan.
authors.forename: Yu-Chi
authors.initials: YC
authors.lastname: Hsieh
authors.forename: Jiun-Ly
authors.initials: JL
authors.lastname: Chir
authors.forename: Shih-Tse
authors.initials: ST
authors.lastname: Yang
authors.forename: Shau-Jiun
authors.initials: SJ
authors.lastname: Chen
authors.forename: Ching-Han
authors.initials: CH
authors.lastname: Hu
authors.forename: An-Tai
authors.initials: AT
authors.lastname: Wu
mesh_terms: D002413:Cations, Divalent / Q000032:analysis*; D003300:Copper / Q000032:analysis*; D043844:Crown Ethers; D005456:Fluorescent Dyes; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D011721:Pyrenes / Q000737:chemistry; D013050:Spectrometry, Fluorescence
chemical_list: D002413:Cations, Divalent; D043844:Crown Ethers; D005456:Fluorescent Dyes; D011721:Pyrenes; D003300:Copper; D008628:Mercury