scholarly journals The long-range non-additive three-body dispersion interactions for the rare gases, alkali, and alkaline-earth atoms

2012 ◽  
Vol 136 (10) ◽  
pp. 104104 ◽  
Author(s):  
Li-Yan Tang ◽  
Zong-Chao Yan ◽  
Ting-Yun Shi ◽  
James F. Babb ◽  
J. Mitroy
Keyword(s):  
Long Range ◽  
Alkaline Earth ◽  
Rare Gases ◽  
Dispersion Interactions ◽  
Three Body

Ionization of alkaline earth additives in hydrogen flames - I. Hydrogen atom concentrations and ion stabilities

1974 ◽  
Vol 338 (1613) ◽  
pp. 155-173 ◽  
Keyword(s):  
Alkaline Earth ◽  
Molecular Ions ◽  
The Other ◽  
Hydrogen Atoms ◽  
Ion Hydration ◽  
Atomic Ions ◽  
Charged Species ◽  
Hydration Energies ◽  
Three Body ◽  
Species Being

The ions present in flames of H 2 +O 2 + N 2 with trace quantities of an alkaline earth M ( = Ca or Sr) added to them have been studied mass spectrometrieally. Those detected were principally MOH + and M + , the only negatively charged species being the free electron. It was established that the reaction M + +H 2 O = MOH + +H was rapid enough to be balanced everywhere in a flame. Detailed studies of (I) provided a means for measuring the concentration of hydrogen atoms at the point of sampling in the flame from observations of [M + ]/[MOH + ]. It proved possible to make absolute determinations of [H]. In addition, the ionization potentials of CaOH and SrOH were measured as 5.7 ± 0.3 and 5.4 ± 0.3 eV, which values are slightly less than those for the corresponding alkaline earth atoms. Hydrates of MOH + and M + were observed, but it was concluded that ion-hydration is not an important flame process in this case, but rather one associated with cooling of gases as they are sampled into the mass spectrometer. It appears that molecular ions hydrate in a two-body process, e. g. MOH + + H 2 O → MOH + . H 2 O with a velocity constant, which is independent of temperature and approximately 1 x 10 –10 ml molecule –1 s –1 . Atomic ions on the other hand initially undergo hydration by a slower three-body step requiring a chaperon molecule. The first hydration energies at absolute zero for CaOH + and SrOH + were measured to be 120±20 and 109±15 kJ mol –1 respectively. These exceed the corresponding quantities for Ca + and Sr + , which were found to be 75±16 and 60±16 kJ mol –1 .

scholarly journals Long-range diatomics+ppotentials of heavy rare gases

1998 ◽  
Vol 57 (5) ◽  
pp. 3603-3620 ◽  
Author(s):  
M. R. Doery ◽  
E. J. D. Vredenbregt ◽  
J. G. C. Tempelaars ◽  
H. C. W. Beijerinck ◽  
B. J. Verhaar
Keyword(s):  
Long Range ◽  
Rare Gases

scholarly journals Long-range dispersion coefficients for Li, Li+, and Be+ interacting with the rare gases

2010 ◽  
Vol 133 (10) ◽  
pp. 104306 ◽  
Author(s):  
Li-Yan Tang ◽  
Jun-Yi Zhang ◽  
Zong-Chao Yan ◽  
Ting-Yun Shi ◽  
J. Mitroy
Keyword(s):  
Long Range ◽  
Rare Gases ◽  
Dispersion Coefficients
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