Abstract
De Boer and Custers1, by an integration process, approximated to the energy of interaction by dispersion forces between a molecule and several types of cavity. On a plane surface containing N atoms of substrate per cm.3 the interaction energy is near to 
if the interaction energy between an isolated sorbate molecule and the nearest atom of sorbent is given by −A/r
6. A is a constant given approximately by the London theory of dispersion forces2. Then, in turn, in a hemispherical pocket, at the bottom of a very long cylindrical capillary with a hemispherical end, and in an isolated spherical cavity, all of radius r and just large enough to contain the molecules, the energies of interaction are respectively E
2 = 4E
1, E
3 = 6.36E
1 and E
4 = 8E
1.
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BARRER, R. Dispersion Energies in Porous Sorbents. Nature 181, 176–177 (1958). https://doi.org/10.1038/181176b0
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DOI: https://doi.org/10.1038/181176b0
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