Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, China.
College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, China.
Luminescence. 2019 Jun;34(4):450-455. doi: 10.1002/bio.3627. Epub 2019 Apr 7.
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.
研究了在稀硫酸溶液中，卤素离子（Cl−、Br−和 I−）对硫酸奎宁荧光的影响。通过荧光光谱、紫外-可见（UV-可见）吸收光谱和荧光衰减技术进行了研究。结果表明，原子质量较大的卤素离子能显著降低硫酸奎宁的荧光强度，因此，卤素离子引起的荧光猝灭顺序为 Cl−<Br−<I−。因此，高浓度的卤素离子会严重猝灭硫酸奎宁的荧光。紫外-可见吸收光谱和荧光衰减技术揭示，卤素离子引起的硫酸奎宁荧光猝灭归因于动态猝灭、静态猝灭过程、自猝灭荧光效应和电子转移。
