title: Synthesis of yeast extract-stabilized Cu nanoclusters for sensitive fluorescent detection of sulfide ions in water.
abstract: In this work, we have presented a novel strategy to utilize as-synthesized yeast extract-stabilized Cu nanoclusters (Cu NCs) for sensitive and selective detection of S(2-). The fluorescence intensity of Cu NCs was enhanced significantly in the presence of both Na2S2O8 and S(2-). By virtue of this specific response, a Cu NC-based fluorescent turn-on sensor was developed, which allows the detection of S(2-) in the range of 0.02-0.8 μM with a detection limit of 10nM. The enhancing mechanism was also discussed based on fluorescence decay, transmission electron microscopy (TEM) and dynamic light scattering (DLS) studies, indicating that S(2-) enhanced the Cu NCs emission mainly through sulfide-induced aggregation of Cu NCs. Furthermore, we demonstrated the usability of the present approach for the detection of S(2-) in water samples, which illustrates its great potential for the environmental monitoring and water quality inspection fields.
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China. Electronic address: jinlihua@nwu.edu.cn.
authors.forename: Lihua
authors.initials: L
authors.lastname: Jin
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China.
authors.forename: Zaihua
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China.
authors.forename: Anwen
authors.initials: A
authors.lastname: Tang
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China.
authors.forename: Cong
authors.initials: C
authors.lastname: Li
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, People's Republic of China. Electronic address: yhshen@nwu.edu.cn.
authors.forename: Yehua
authors.initials: Y
authors.lastname: Shen
mesh_terms: D003300:Copper / Q000737:chemistry*; D060766:Drinking Water / Q000032:analysis; D005456:Fluorescent Dyes / Q000737:chemistry*; D005618:Fresh Water / Q000032:analysis; D057230:Limit of Detection; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology; D013050:Spectrometry, Fluorescence / Q000379:methods; D013440:Sulfides / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D015003:Yeasts / Q000737:chemistry*
chemical_list: D060766:Drinking Water; D005456:Fluorescent Dyes; D013440:Sulfides; D014874:Water Pollutants, Chemical; D003300:Copper
keywords: Cu nanoclusters; Fluorescent sensors; Sulfide ion; Yeast extract