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Keywords:

  • hydrogen isotopes;
  • gas adsorption;
  • quantum sieving;
  • isotope separation;
  • metal-organic frameworks
Thumbnail image of graphical abstract

The metal-organic framework, MFU-4, possessing small cavities and apertures, is exploited for quantum sieving of hydrogen isotopes. Quantum mechanically, a molecule confined in a small cavity shows an increase in effective size depending on the particle mass, which leads to a faster deuterium adsorption from a H2/D2 isotope mixture.