title: Synthesis of fluorescent gold nanoclusters directed by bovine serum albumin and application for nitrite detection.
abstract: In the present work, gold nanocluster (GNC) induced by bovine serum albumin (BSA) was synthesized as a novel fluorescence probe to detect nitrite (NO2(-)) sensitively and selectively. The fluorescence of GNC was found to be quenched effectively by NO2(-). Under the optimum conditions, it was found that the change of fluorescence intensity was proportional with the concentration of NO2(-) in the linear range of 0.1-50 μM (R = 0.9990), with a detection limit (S/N = 3) of 30 nM. The absorption spectroscopy, circular dichroism (CD), and X-ray photoelectron spectroscopy (XPS) studies were employed to discuss the quenching mechanism. In addition, the present approach was successfully applied in real water samples.
authors.affiliation: Department of Chemistry, Liaocheng University, Liaocheng, 252059, People's Republic of China.
authors.forename: Qiaoli
authors.initials: Q
authors.lastname: Yue
authors.forename: Lijun
authors.initials: L
authors.lastname: Sun
authors.forename: Tongfei
authors.initials: T
authors.lastname: Shen
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Gu
authors.forename: Shuqiu
authors.initials: S
authors.lastname: Zhang
authors.forename: Jifeng
authors.initials: J
authors.lastname: Liu
mesh_terms: D000818:Animals; D002417:Cattle; D005456:Fluorescent Dyes / Q000032:analysis / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D009573:Nitrites / Q000032:analysis*; D012710:Serum Albumin, Bovine / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D009573:Nitrites; D012710:Serum Albumin, Bovine; D006046:Gold