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A Highly Selective Turn-On Fluorescent Probe for the Detection of Zinc.

ABSTRACT: A novel turn-on fluorescence probe L has been designed that exhibits high selectivity and sensitivity with a detection limit of 9.53 × 10-8 mol/L for the quantification of Zn2+. 1H-NMR spectroscopy and single crystal X-ray diffraction analysis revealed the unsymmetrical nature of the structure of the Schiff base probe L. An emission titration experiment in the presence of different molar fractions of Zn2+ was used to perform a Job's plot analysis. The results showed that the stoichiometric ratio of the complex formed by L and Zn2+ was 1:1. Moreover, the molecular structure of the mononuclear Cu complex reveals one ligand L coordinates with one Cu atom in the asymmetric unit. On adding CuCl2 to the ZnCl2/L system, a Cu-Zn complex was formed and a strong quenching behavior was observed, which inferred that the Cu2+ displaced Zn2+ to coordinate with the imine nitrogen atoms and hydroxyl oxygen atoms of probe L.

SUBMITTER: Shen LY

PROVIDER: S-EPMC8270291 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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A Highly Selective Turn-On Fluorescent Probe for the Detection of Zinc.

Shen Ling-Yi LY Chen Xiao-Li XL Yang Xian-Jiong XJ Xu Hong H Huang Ya-Li YL Zhang Xing X Redshaw Carl C Zhang Qi-Long QL

Molecules (Basel, Switzerland) 20210623 13

A novel turn-on fluorescence probe L has been designed that exhibits high selectivity and sensitivity with a detection limit of 9.53 × 10-8 mol/L for the quantification of Zn2+. 1H-NMR spectroscopy and single crystal X-ray diffraction analysis revealed the unsymmetrical nature of the structure of the Schiff base probe L. An emission titration experiment in the presence of different molar fractions of Zn2+ was used to perform a Job's plot ...[more]

PMID: 34201677

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