title: Sensitive detection of mercury (II) ion using water-soluble captopril-stabilized fluorescent gold nanoparticles.
abstract: In our work, a simple, facile, and green method was developed for the synthesis of water-soluble and well-dispersed fluorescent gold nanoparticles (Au NPs) within 5 min, using captopril as a capping agent. The as-prepared Au NPs showed strong emission at 414 nm, with a quantum yield of 5.5%. The fluorescence of the Au NPs can be strongly quenched by mercury (II) ion (Hg(2+)) due to the stronger interactions between thiolates (RS(-)) and Hg(2+). It was applied to the detection of Hg(2+) in water samples in the linear ranges of 0.033-0.133 μM and 0.167-2.500 μM, with a detection limit of 0.017 μM. Therefore, the as-prepared Au NPs can meet the requirement for monitoring Hg(2+) in environmental samples.
authors.affiliation: College of Geography and Environmental Science, College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Jiu-Ju
authors.initials: JJ
authors.lastname: Feng
authors.forename: Hong
authors.initials: H
authors.lastname: Huang
authors.forename: Wei-Jie
authors.initials: WJ
authors.lastname: Chen
authors.forename: Jian-Rong
authors.initials: JR
authors.lastname: Chen
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Lin
authors.forename: Ai-Jun
authors.initials: AJ
authors.lastname: Wang
mesh_terms: D002216:Captopril / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D053768:Metal Nanoparticles; D046529:Microscopy, Electron, Transmission; D012995:Solubility; D014867:Water
chemical_list: D014867:Water; D006046:Gold; D002216:Captopril; D008628:Mercury