Femtosecond mid-infrared spectroscopy of aqueous solvation shells

被引:107
作者
Kropman, MF [1 ]
Bakker, HJ [1 ]
机构
[1] FOM, Inst AMOLF, NL-1098 SJ Amsterdam, Netherlands
关键词
D O I
10.1063/1.1412249
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We use femtosecond two-color mid-infrared spectroscopy to study the dynamics of aqueous solutions of salts in HDO:D2O. We find that the lifetime of the O-H stretch vibration of HDO molecules in the solvation shell of the halogenic anions Cl-, Br-, and I- is much longer than the lifetime of the O-H stretch vibration of the HDO molecule in bulk D2O solution. This difference in lifetime allows for a clear separation of the response of the solvation shell from that of the bulk liquid. A detailed investigation of the spectral dynamics of the solvating HDO molecules reveals that the hydrogen-bond dynamics of these molecules are much slower than the hydrogen-bond dynamics of bulk liquid water. (C) 2001 American Institute of Physics.
引用
收藏
页码:8942 / 8948
页数:7
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