多环芳烃时间分辨荧光光谱特性研究

利用时间分辨荧光光谱技术，研究了菲、荧蒽、芴、蒽、芘等五种多环芳烃的荧光时间分辨发射光谱特性。以289 nm受激拉曼光作为激发光源，研究了289 nm激发光作用下五种多环芳烃的延时特性和门宽特性。并以多环芳烃随延时时间的荧光峰强度衰减关系曲线，得到菲、荧蒽、芴、芘的荧光寿命分别为37.0, 32.7, 10.9, 147.0 ns。不同荧光物质具有特定的荧光光谱特性，多环芳烃时间分辨荧光光谱特性的研究可以为复杂水体中不同种类多环芳烃的诊断提供依据。

Characterization of Polycyclic Aromatic Hydrocarbons with Time-Resolved Fluorescence

Characteristic time-resolved fluorescence spectroscopy of polycyclic aromatic hydrocarbons were studied.Stimulated Raman scattering (SRS) was used to generate several excitation wavelengths,289nm was selected as excitation source in this paper.Delay characterization and gate characterization were researched.According to the decay relationship between fluorescence intensity and delay time,fluorescence lifetime of phenanthrene,fluoranthene,fluorene,pyrene were obtained,which were 37.0,32.7,10.9,147.0 ns respectively.Different fluorescent substances have specific fluorescence spectral characteristics,the study of time-resolved fluorescence spectral of polycyclic aromatic hydrocarbons can provide the diagnosis basis for different polycyclic aromatic hydrocarbons in complex water environment.