Different microporous frameworks have been experimentally investigated by cryogenic (below 77 K) hydrogen and deuterium adsorption measurements. The D2/H2 molar ratio is strongly dependent on pore size, pressure and temperature. The experiments clearly indicate that the optimum pore diameter for quantum sieving lies between 3.0 Å and 3.4 Å.
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Oh et al. (2013) studied this question.
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