用稳态和时间分辨荧光光谱研究乙醇－水分子团簇的可能类型

研究了紫外光照射乙醇－水混合溶液的稳态和时间分辨荧光光谱.通过检测其荧光光谱和激发光谱,得到了稳态发射光谱的三个荧光峰,峰值分别位于290 nm、305 nm、330 nm,相应的最佳激励光分别为265 nm, 280 nm 和236 nm.在荧光光谱峰值波长处分别监测其荧光强度随时间的衰变过程,将获得的荧光衰减动力学曲线采用指数拟合并进行解卷积处理获得不同荧光光子的寿命值.乙醇－水溶液稳态光谱的特点和三个不同的荧光寿命都表明了溶液中含有三个不同的生色团,分析认为乙醇和水分子间通过氢键作用形成了不同结构的团簇分子.

Study on Ethanol-Water Cluster Types with Steady State and Time Resolved Fluorescence Spectrometer

The steady state and time resolved fluorescence spectrum of ethanol-water solution has been studied. The three different emission bands located at 290 nm, 305 nm and 330 nm, respectively, and the three corresponding excitation lights with the absorption peaks of 265 nm, 280 nm and 236 nm have been measured respectively by the fluorescent spectra and the excitation spectra. The decay process of fluorescence intensity was detected and the curve was fitted by an exponential function. The lifetime parameters of different fluorescent photons were obtained by the numerical analysis procedure of deconvolutions. The characteristic of the steady state spectra and the three different lifetimes confirm the fact that there are three clusters in ethanol-water solution.