High adsorption of ammonia in a titanium-based metal–organic framework

Xiangdi Zeng; Jiangnan Li; Meng He; Wanpeng Lu; Danielle Crawshaw; Lixia Guo; Yujie Ma; Meredydd Kippax-Jones; Yongqiang Cheng; Pascal Manuel; Svemir Rudić; Mark D. Frogley; Martin Schröder; Sihai Yang

doi:10.1039/D4CC01449A

High adsorption of ammonia in a titanium-based metal–organic framework†

Xiangdi Zeng,^a Jiangnan Li,^ab Meng He,

^a Wanpeng Lu,^a Danielle Crawshaw,

^a Lixia Guo,^ab Yujie Ma,

^a Meredydd Kippax-Jones,^ac Yongqiang Cheng,^d Pascal Manuel,^e Svemir Rudić,

^e Mark D. Frogley,

^c Martin Schröder

*^a and Sihai Yang

*^ab

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 College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, China
E-mail: Sihai.Yang@pku.edu.cn

^c Diamond Light Source, Harwell Science Campus, Oxfordshire, UK

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

^e ISIS Neutron and Muon Facility, Rutherford Appleton Laboratory, Didcot, UK

Abstract

We report the high adsorption of NH₃ in a titanium-based metal–organic framework, MFM-300(Ti), comprising extended [TiO₆]_∞ chains linked by biphenyl-3,3′,5,5′-tetracarboxylate ligands. At 273 K and 1 bar, MFM-300(Ti) shows an exceptional NH₃ uptake of 23.4 mmol g⁻¹ with a record-high packing density of 0.84 g cm⁻³. Dynamic breakthrough experiments confirm the excellent uptake and separation of NH₃ at low concentration (1000 ppm). The combination of in situ neutron powder diffraction and spectroscopic studies reveal strong, yet reversible binding interactions of NH₃ to the framework oxygen sites.

This article is part of the themed collections: ChemComm 60th Anniversary Collection, Celebrating the 200th Anniversary of the University of Manchester and Celebrating our 2024 Prizewinners

Chemical Communications

High adsorption of ammonia in a titanium-based metal–organic framework†

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