Abstract 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.
Received: 09 September 1998
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 19525412 and 19884-001) and by the National Climbing Program in the "9th 5-Year Plan" and Youth Foundation for Laser Tec-hnology of High Technology Research and Development
Cite this article:
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) SOLVATION DYNAMICS OF METHANOL INVESTIGATED BY FEMTOSECOND TIME-RESOLVED FLUORESCENCE UP-CONVERSION TECHNIQUE 1999 Acta Physica Sinica (Overseas Edition) 8 383
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