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采用波长为236nm紫外光激励乙醇水溶液获得荧光光谱并对其偏振特性进行了研究.实验中分别改变入射光的偏振度,在300—400nm波段内进行荧光光谱、水平和垂直偏振荧光光谱检测.实验结果表明,当采用线偏振光照射乙醇水溶液时,其发射的荧光具有一定的偏振性,并计算了其偏振度.经理论分析得到了描述荧光偏振态的四个斯托克斯矢量,进而对该荧光的偏振状态进行了描述,通过对乙醇-水溶液的米勒矩阵的计算,对溶液中分子的取向特性进行了分析.本结果能对乙醇-水团簇分子的结构提供理论参考.
Fluorescence spectra were obtained by using aqueous solution of ethanol at a wavelength of 236 nm and their polarization properties were studied.The polarization degree of incident light was changed respectively and fluorescence spectra, horizontal and vertical polarization fluorescence spectra were measured in the range of 300-400 nm. The results show that when the linear polarized light is irradiated on the aqueous ethanol solution, the emitted fluorescence has a certain degree of polarization and its polarization degree has been calculated. Four Stokes vectors describing the polarization state of fluorescence have been obtained by theoretical analysis. The polarization states of the fluorescence were described, and the molecular orientation characteristics of the solution were analyzed by calculating the Miller matrix of the ethanol - water solution.The results can provide a theoretical reference for the structure of the ethanol - water cluster molecule.