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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Investigation of the Solvation Dynamics of an Organic Dye in Polar Solvents Using the Femtosecond Transient Grating Technique
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Investigation of the Solvation Dynamics of an Organic Dye in Polar Solvents Using the Femtosecond Transient Grating Technique

机译:飞秒瞬变光栅技术研究极性染料中有机染料的溶剂化动力学

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摘要

The solvation dynamics of an organic dye, IR140, in methanol, ethanol, and in a series of six alkanenitriles has been investigated using the transient grating technique. In all solvents, he dynamics exhibit ultrafast, almost solvent-independent, components ascribed to inertial solvation, and a slower viscosity-dependent component, due to diffusive solvation. The relative amplitudes of these components depend on both the solvent and on the wavelength at which the experiment is performed. The contribution of inertial motion increases with decreasing size of the solvent molecules and with decreasing wavelength. It appears that diffusive motion is associated with a loose solvent shell, while inertial motion dominates when the solvation layer is dense.
机译:使用瞬态光栅技术研究了有机染料IR140在甲醇,乙醇和一系列六个烷烃中的溶剂化动力学。在所有溶剂中,动力学表现出归因于惯性溶剂化的超快,几乎与溶剂无关的组分,以及由于扩散溶剂化而导致的较慢的粘度依赖性组分。这些成分的相对幅度既取决于溶剂,也取决于进行实验的波长。惯性运动的贡献随着溶剂分子尺寸的减小和波长的减小而增加。似乎扩散运动与松散的溶剂壳有关,而当溶剂化层致密时,惯性运动占主导。

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