title: Cooperative binding of bifunctionalized and click-synthesized silver nanoparticles for colorimetric co(2+) sensing.
abstract: Bifunctionalized silver nanoparticles (triazole-carboxyl Ag NPs) were synthesized through a click reaction and have a cooperative effect on recognition of Co(2+), resulting in appreciable changes in color and absorption properties over other metal ions tested, including Fe(2+), Mn(2+), Hg(2+), Ni(2+), Cd(2+), Cu(2+), Zn(2+), Pb(2+), Li(+), Na(+), K(+), Cs(+). The functionalized silver nanoparticles became aggregated in solution in the present of Co(2+) through cooperative metal-ligand interaction. The colorimetric sensor allows a rapidly quantitive assay of Co(2+) down to the concentration of 7.0 x 10(-6) M. Moreover, the triazole-carboxyl AgNPs can be capable of evaluating the exceeding standard of Co(2+) in drinking water.
authors.affiliation: Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Yao
authors.forename: Demei
authors.initials: D
authors.lastname: Tian
authors.forename: Haibing
authors.initials: H
authors.lastname: Li
mesh_terms: D003124:Colorimetry / Q000379:methods*; D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D012834:Silver / Q000032:analysis* / Q000737:chemistry*
chemical_list: D012834:Silver