Citation: Ruijun Li, Changlong Zhu, Yibing Ji. Fluorescent Probe for Hg²⁺ Detection Based on Functionalized Gold Nanorods[J]. Chemistry, ;2021, 84(3): 261-266. shu

Fluorescent Probe for Hg²⁺ Detection Based on Functionalized Gold Nanorods

Department of Analytical Chemistry, School of Science, China Pharmaceutical University, Nanjing, 211198

Corresponding author: Yibing Ji, jiyibing@msn.com
Received Date: 17 August 2020
Accepted Date: 28 October 2020

Figures(9)

Bovine serum albumin (BSA) functionalized gold nanorods (BSA-Cys-GNRs) as a fluorescence probe for the detection of Hg²⁺ has been developed in this work. BSA was successfully modified on the surface of gold nanorods with cysteine as the linker. The materials were characterized by UV-Vis, FL, FT-IR and inverted fluorescence microscopy. The BSA-Cys-GNRs displays strong fluorescence emission peak at 338 nm under excitation at 295 nm. The fluorescence of BSA-Cys-GNRs is strongly quenched upon addition of Hg²⁺ ions. Effective detection conditions are pH 4.0 and incubating time 5.0 min. Mn²⁺, K⁺, Ni²⁺, Na⁺, Cr³⁺, Cd²⁺, Mg²⁺, Cu²⁺, Ca²⁺, Al³⁺ and Zn²⁺ are examined under identical conditions, and all of them do not induce any noticeable responses to BSA-Cys-GNRs. There is a good linear dependence of fluorescence intensity on Hg²⁺ concentration in the range of 0.04444~8.888 μmol·L^-1 with the detection limit of 8.08 nmol·L^-1. Furthermore, the method has been applied for the determination of Hg²⁺ in water samples, and the recoveries are in the range of 98.9%~105.0%.
- Gold nanorods,
- Fluorescent probe,
- Hg²⁺
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Fluorescent Probe for Hg2+ Detection Based on Functionalized Gold Nanorods

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通讯作者: 陈斌, bchen63@163.com

Fluorescent Probe for Hg²⁺ Detection Based on Functionalized Gold Nanorods