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Studies of the Effect of Halide Ions on the Fluorescence of Quinine Sulfate

Studies of the Effect of Halide Ions on the Fluorescence of Quinine Sulfate

Yongming Guo, Fengpu Cao, Pengxiang Qiu, Zhuo Wang

Luminescence. 2019 Jun;34(4):450-455.

PMID: 30957348

Abstract:

The effect of halide ions (Cl- , Br- and I- ) on the fluorescence of quinine sulfate in dilute sulfuric acid solution was studied by fluorescence spectra, ultraviolet-visible (UV-visible) absorption spectra and fluorescence decay technique. The results exhibited that halide ions with heavier atomic mass could significantly reduce the fluorescence intensity of quinine sulfate, as a result, the order of fluorescence quenching caused by halide ions is Cl- < Br- < I- . Therefore, halide ions with high concentration could seriously quench the fluorescence of quinine sulfate. The UV-visible absorption spectra and fluorescence decay technique revealed that the fluorescence quenching of quinine sulfate caused by halide ions was attributed to dynamic quenching, static quenching process, self-quenching fluorescence effect and electronic transfer.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP207671441	Quinine sulfate		207671-44-1	Price

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