title: An NBD-based sensitive and selective fluorescent sensor for copper(II) ion.
abstract: A new 7-nitrobenz-2-oxa-1,3-diazole (NBD) derived fluorescent probe (1) exhibiting high selectivity for Cu(2+) detection, produced significant fluorescence quenching in the presence of Cu(2+) ion, while the metal ions Ca(2+), Cd(2+), Co(2+), Fe(2+), Hg(2+), Mg(2+), Mn(2+), Ni(2+) and Zn(2+) produced only minor changes in fluorescence. The apparent association constant (K (a)) for Cu(2+) binding in chemosensor 1 was found to be 1.22 × 10(3) M(-1). The maximum fluorescence quenching activity caused by Cu(2+) binding to 1 was observed over the pH range 6-10.
authors.affiliation: Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 300, Republic of China.
authors.forename: Shi-Rong
authors.initials: SR
authors.lastname: Liu
authors.forename: Shu-Pao
authors.initials: SP
authors.lastname: Wu
mesh_terms: D003300:Copper / Q000032:analysis*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D007477:Ions / Q000032:analysis; D015394:Molecular Structure; D010069:Oxadiazoles / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: C526864:7-nitrobenz-2-oxa-1,3-diazole; D005456:Fluorescent Dyes; D007477:Ions; D010069:Oxadiazoles; D003300:Copper