溶剂化电子
溶剂化
电离
放松(心理学)
电子
化学
重组
原子物理学
吸收(声学)
吸收光谱法
超快激光光谱学
光谱学
溶剂化壳
大气温度范围
分子物理学
化学物理
材料科学
放射分析
离子
物理化学
热力学
物理
水溶液
复合材料
有机化学
生物化学
量子力学
社会心理学
基因
心理学
作者
Dorte Madsen,Carsten Thomsen,Jan Thøgersen,S. R. Keiding
摘要
The ultrafast solvation and recombination dynamics of the hydrated electron generated by two-photon ionization of water at 4.65 eV is studied by transient absorption spectroscopy as a function of temperature in the range from 277 K to 355 K. The part of the spectral blue shift which is observed in the absorption spectrum of the hydrated electron after 1 ps is purely continuous and is accurately described by the well known analytical expression for the temperature dependent absorption spectrum of the ground state hydrated electron. This indicates that thermal relaxation or more likely solvation of the hydrated electron predominantly causes the blue shift. The survival probability of the hydrated electron shows a strong temperature dependence, which is satisfactory explained by the temperature dependent mobility and reaction rates of the species involved in the recombination. This implies that the average initial separation between the hydrated electron and the ionization site of 〈r0〉=1.0±0.1 nm does not depend significantly on the bulk water temperature.
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