title: One-step synthesis and applications of fluorescent Cu nanoclusters stabilized by L-cysteine in aqueous solution.
abstract: Herein, an innovative and simple strategy for synthesizing high fluorescent Cu nanoclusters was successfully established while L-cysteine played a role as the stabilizer. Meaningfully, the current Cu nanoclusters together with a quantum yield of 14.3% were prepared in aqueous solution, indicating their extensive applications. Subsequently, the possible fluorescence mechanism was elucidated by fluorescence, UV-vis, HR-TEM, FTIR, XPS, and MS. Additionally, the CuNCs were employed for assaying Hg(2+) on the basis of the interactions between Hg(2+) and L-cysteine; thus facilitating the quenching of their fluorescence. The proposed analytical strategy permitted detections of Hg(2+) in a linear range of 1.0×10(-7) mol L(-1)×10(-3) mol L(-1), with a detection limit of 2.4×10(-8) mol L(-1) at a signal-to-noise ratio of 3. Significantly, this CuNCs described here were further applied for coding and fluorescent staining, suggesting may broaden avenues toward diverse applications.
authors.affiliation: College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China. Electronic address: ming4444@swu.edu.cn.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Yang
authors.affiliation: College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
authors.forename: Yuanjiao
authors.initials: Y
authors.lastname: Feng
authors.affiliation: College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
authors.forename: Shanshan
authors.initials: S
authors.lastname: Zhu
authors.affiliation: College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
authors.forename: Yawen
authors.initials: Y
authors.lastname: Luo
authors.affiliation: College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhuo
authors.affiliation: College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Dou
mesh_terms: D003300:Copper / Q000737:chemistry*; D003545:Cysteine / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D005456:Fluorescent Dyes; D003300:Copper; D008628:Mercury; D003545:Cysteine
keywords: Applications; Cu nanoclusters; One-step synthesis; l-cysteine