The fluorescence of a mercury probe based on osthol.

ABSTRACT: The ability of osthol (OST) to recognize mercury ions in aqueous solution was studied using fluorescence, UV-vis spectrophotometry, mass spectrometry, and ¹H NMR spectroscopy, and the recognition mechanism is discussed. The results showed that OST and Hg²⁺ can form a complex with a stoichiometric ratio of 1:1. The binding constant was 1.552 × 10⁵ L∙mol^-1, having a highly efficient and specific selectivity for Hg²⁺. The fluorescence intensity of OST showed a good linear correlation with the Hg²⁺ concentration (6.0 × 10^-5 to 24.0 × 10^-5 mol∙L^-1, R ² = 0.9954), and the detection limit of the probe was 5.04 × 10^-8 mol∙L^-1, which can be used for the determin

SUBMITTER: Luo G 

PROVIDER: S-EPMC7801779 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature