Blackbody infrared radiative dissociation at low temperature:: hydration of X2+(H2O)n, for X = Mg, Ca

被引:113
作者
Wong, RL [1 ]
Paech, K [1 ]
Williams, ER [1 ]
机构
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
基金
美国国家科学基金会;
关键词
hydration; BIRD; binding energies; metal ions; dissociation;
D O I
10.1016/j.ijms.2003.11.008
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
A new apparatus for making blackbody infrared radiative dissociation (BIRD) measurements at below ambient temperature is described, and its use for measuring threshold dissociation energies of weakly bound clusters is demonstrated. Hydration energies are determined for alkaline-earth metal water clusters, X2+(H2O)(n), X = Mg, Ca and n = 8-10. For n = 8 and 9, the energies obtained from BIRD measurements are in excellent agreement with values reported previously, but for n = 10, the energies are slightly lower than those determined previously using the high-pressure ion source mass spectrometry (HPMS) equilibrium method. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:59 / 66
页数:8
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