High capacity ammonia adsorption in a robust metal-organic framework mediated by reversible host-guest interactions.

ABSTRACT: To understand the exceptional adsorption of ammonia (NH₃) in MFM-300(Sc) (19.5 mmol g^-1 at 273 K and 1 bar without hysteresis), we report a systematic investigation of the mechanism of adsorption by a combination of in situ neutron powder diffraction, inelastic neutron scattering, synchrotron infrared microspectroscopy, and solid-state ⁴⁵Sc NMR spectroscopy. These complementary techniques reveal the formation of reversible host-guest supramolecular interactions, which explains directly the observed excellent reversibility of this material over 90 adsorption-desorption cycles.

SUBMITTER: Guo L 

PROVIDER: S-EPMC9089318 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature