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

Lixia Guo; Xue Han; Yujie Ma; Jiangnan Li; Wanpeng Lu; Weiyao Li; Daniel Lee; Ivan da Silva; Yongqiang Cheng; Svemir Rudić; Pascal Manuel; Mark D. Frogley; Anibal J. Ramirez-Cuesta; Martin Schröder; Sihai Yang

doi:10.1039/D2CC01197B

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

Lixia Guo,

^a Xue Han,

^a Yujie Ma,

^a Jiangnan Li,

^a Wanpeng Lu,

^a Weiyao Li,

^a Daniel Lee,

^b Ivan da Silva,

^c Yongqiang Cheng,^d Svemir Rudić,

^c Pascal Manuel,^c Mark D. Frogley,

^e Anibal J. Ramirez-Cuesta,

^d Martin Schröder

*^a and Sihai Yang

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, University of Manchester, Manchester, UK
E-mail: M.Schroder@manchester.ac.uk, Sihai.Yang@manchester.ac.uk

^b Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester, UK

^c ISIS Facility, STFC Rutherford Appleton Laboratory, Oxfordshire, UK

^d Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

^e Diamond Light Source, Harwell Science and Innovation Campus, Oxfordshire, UK

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.

This article is part of the themed collections: Celebrating the 200th Anniversary of the University of Manchester and 2022 Pioneering Investigators

Chemical Communications

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

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