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B22-Multimode InfraRed imaging And Microspectroscopy	Efficient capture and storage of ammonia in robust aluminium-based metal-organic frameworks Lixia Guo , Joseph Hurd , Meng He , Wanpeng Lu , Jiangnan Li , Danielle Crawshaw , Mengtian Fan , Sergey A. Sapchenko , Yinlin Chen , Xiangdi Zeng , Meredydd Kippax-Jones , Wenyuan Huang , Zhaodong Zhu , Pascal Manuel , Mark D. Frogley , Daniel Lee , Martin Schroeder , Sihai Yang Communications Chemistry 6 DOI: 10.1038/s42004-023-00850-4 Diamond Proposal Number(s): [30398] Open Access Show Abstract ▼ Abstract: The development of stable sorbent materials to deliver reversible adsorption of ammonia (NH3) is a challenging task. Here, we report the efficient capture and storage of NH3 in a series of robust microporous aluminium-based metal-organic framework materials, namely MIL-160, CAU-10-H, Al-fum, and MIL-53(Al). In particular, MIL-160 shows high uptakes of NH3 of 4.8 and 12.8 mmol g−1 at both low and high pressure (0.001 and 1.0 bar, respectively) at 298 K. The combination of in situ neutron powder diffraction, synchrotron infrared micro-spectroscopy and solid-state nuclear magnetic resonance spectroscopy reveals the preferred adsorption domains of NH3 molecules in MIL-160, with H/D site-exchange between the host and guest and an unusual distortion of the local structure of [AlO6] moieties being observed. Dynamic breakthrough experiments confirm the excellent ability of MIL-160 to capture of NH3 with a dynamic uptake of 4.2 mmol g−1 at 1000 ppm. The combination of high porosity, pore aperture size and multiple binding sites promotes the significant binding affinity and capacity for NH3, which makes it a promising candidate for practical applications.	Mar 2023

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B22-Multimode InfraRed imaging And Microspectroscopy

Efficient capture and storage of ammonia in robust aluminium-based metal-organic frameworks