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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Solvation dynamics of electron produced by two-photon ionization of liquid polyols. III. Glycerol
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Solvation dynamics of electron produced by two-photon ionization of liquid polyols. III. Glycerol

机译：液态多元醇的双光子电离产生的电子的溶剂化动力学。三，甘油

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摘要

The solvation dynamics of excess electrons in glycerol have been measured by the pump-probe femtosecond laser technique at 333 K. The electrons are produced by two-photon absorption at 263 nm. The change in the induced absorbance is followed up to 450 ps in the spectral range from 440 to 720 nm. The transient signals of electron solvation have been analyzed by two kinetic models: a stepwise mechanism and a continuous relaxation model, using a Bayesian data analysis method. The results are compared with those previously published for ethylene glycol (J. Phys. Chem. A 2006, 110, 175) and for propanediols (J. Phys. Chem. A 2007, 111, 4902). From the comparison, it is pointed out that solvation dynamics in glycerol is very fast despite its high viscosity. This is interpreted as the existence of efficient traps for the electrons in glycerol with low potential energy. The small shift of the absorption band of the excess electron indicates that the potential of these traps is very close to that corresponding to the fully solvated electron.
机译：甘油中过量电子的溶剂化动力学已通过泵浦飞秒飞秒激光技术在333 K下进行了测量。电子是通过在263 nm处的双光子吸收产生的。在440至720 nm的光谱范围内，引起的吸光度变化达到450 ps。电子溶解的瞬态信号已通过贝叶斯数据分析方法通过两个动力学模型进行了分析：逐步机理和连续弛豫模型。将结果与先前针对乙二醇（J. Phys。Chem。A 2006，110，175）和针对丙二醇（J. Phys。Chem。A 2007，111，4902）公布的结果进行比较。从比较中可以看出，尽管甘油具有高粘度，但其溶剂化动力学非常快。这被解释为甘油中低势能的电子有效陷阱的存在。多余电子的吸收带的小位移表明，这些陷阱的电势非常接近于完全溶剂化的电子的电势。

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