中国物理B ›› 1999, Vol. 8 ›› Issue (5): 383-388.doi: 10.1088/1004-423X/8/5/010
• • 上一篇
张铁桥, 王树峰, 杨宏, 李建良, 龚旗煌
Zhang Tie-qiao (张铁桥), Wang Shu-feng (王树峰), Yang Hong (杨宏), Li Jian-liang (李建良), Gong Qi-huang (龚旗煌)
摘要: The solvation dynamics of methanol has been investigated using a femtosecond time-resolved fluorescence up-conversion technique. Transient fluorescence spectra of Coumarin 152A dissolved in methanol at different time were reconstructed from the measured fluorescence decays. The Stokes shift was obtained and the solvent response function Sv(t) was fitted using a bimodal function with a fast Gaussian component and a slow bi-exponential component. The Gaussian component was attributed to the effect of free streaming motion of the solvent molecules, whereas the bi-exponential component was caused by the rotational diffusion motion of the solvent molecules. A comparison of our results with reported data was made.
中图分类号: (Fluorescence and phosphorescence spectra)