天津科技大学学报Issue(5)：32-36,5.DOI:10.13364/j.issn.1672-6510.20140145
水杨基荧光酮的荧光光谱与荧光量子产率
Fluorescence Spectra and the Quantum Yield of Salicylfluorone
摘要
Abstract
Fluorescence spectra and fluorescence quantum yield of Salicylfluorone(SAF)have been studied. Under the con-dition of pH<2.0,SAF has no fluorescence. With the increase of pH value,SAF changes from non-luminous chemical to fluorophore and its fluorescence intensity increases. In the range of pH 6.0-7.0,SAF gives a strong and steady fluorescence with a maximum emission wavelength of 537,nm and excitation wavelength of 507,nm. In alkaline solution,fluorescence intensity of SAF decreases with the increase of pH value,and it has no fluorescence when pH>10.0. There is an excellent linear relationship between fluorescence intensity and the concentration of SAF in pH=6.5 buffer solution.The linear range is 2.0×10-7-1.2×10-6 mol/L,and the detection limit is 5.2×10-9 mol/L. In alcoholic solutions,Stokes drift of SAF in-creases as blue shift occurs on molecular excitation wavelength and red shift occurs on emission wavelength.β-cyclodextrin can be used as an excellent sensitizer because fluorescence intensity of SAF is enhanced enormously by addingβ-CD. Rho-damine 6,G was used as a reference,and fluorescence quantum yield of SAF was measured by means of Williams gradient method. At the excitation wavelength 500,nm,the fluorescence quantum yield of SAF is 0.68.关键词
水杨基荧光酮/荧光光谱/荧光量子产率/罗丹明6GKey words
Salicylfluorone/fluorescence spectra/fluorescence quantum yield/Rhodamine 6,G分类
化学化工引用本文复制引用
张锋,张洪锋,杨明非,顾皞..水杨基荧光酮的荧光光谱与荧光量子产率[J].天津科技大学学报,2015,(5):32-36,5.基金项目
中央高校基本科研业务费专项资金资助项目(2572014BB18) （2572014BB18）
