The Anisotropy of Ether Solution Based on The Orientation Character of Dipole Transition Moment
基于跃迁偶极矩取向特征研究乙醚溶液中分子的各向异性度

The orientation character of dipole transition moment of ether solution was studied by polarization fluorescence spectrum and polarization excitation spectrum,in which there is a fluorescence peak at 305nm whose optimal excitation wavelength is 256 nm.According to the polarization excitation spectrum,the change rule of the angle α between the fluorophore′s absorption transition moment and emission transition moment is obtained,and then the process of fluorescence depolarization is uncovered:the fluorescence molecule has a certain orientation in a highly viscous solution; the angle α is changing with different excitation wavelengths,as the more the excitation light is close to the optimal excitation wavelength,the more the absorption transition moment will parallel closely to emission transition moment which resulted in a weak depolarization and the biggest polarization ratio.The research can provide a reference for the theoretical study on the molecular character.