Journal
LUMINESCENCE
Volume 34, Issue 4, Pages 450-455Publisher
WILEY
DOI: 10.1002/bio.3627
Keywords
fluorescence; halide ions; quinine sulfate
Categories
Funding
- National Natural Science Foundation of China [21401113, 21575032, 81728010]
- Beijing Natural Science Foundation [L172018]
- Natural Science Foundation of Henan Department of Science Technology [172102310668]
- Startup Foundation for Introducing Talent of NUIST [2018r056]
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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.
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