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Instruments / Technical Area	Publication Details	Published
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
B22-Multimode InfraRed imaging And Microspectroscopy I19-Small Molecule Single Crystal Diffraction	Adsorption of sulfur dioxide in Cu(II)-carboxylate framework materials: the role of ligand functionalization and open metal sites Weiyao Li , Jiangnan Li , Thien D. Duong , Sergey A. Sapchenko , Xue Han , Jack D. Humby , George F. S. Whitehead , Inigo J. Vitórica-Yrezábal , Ivan Da Silva , Pascal Manuel , Mark D. Frogley , Gianfelice Cinque , Martin Schroeder , Sihai Yang Journal Of The American Chemical Society 12 DOI: 10.1021/jacs.2c03280 Diamond Proposal Number(s): [28479, 23480] Open Access Show Abstract ▼ Abstract: The development of efficient sorbent materials for sulfur dioxide (SO2) is of key industrial interest. However, due to the corrosive nature of SO2, conventional porous materials often exhibit poor reversibility and limited uptake toward SO2 sorption. Here, we report high adsorption of SO2 in a series of Cu(II)-carboxylate-based metal–organic framework materials. We describe the impact of ligand functionalization and open metal sites on the uptake and reversibility of SO2 adsorption. Specifically, MFM-101 and MFM-190(F) show fully reversible SO2 adsorption with remarkable capacities of 18.7 and 18.3 mmol g–1, respectively, at 298 K and 1 bar; the former represents the highest reversible uptake of SO2 under ambient conditions among all porous solids reported to date. In situ neutron powder diffraction and synchrotron infrared microspectroscopy enable the direct visualization of binding domains of adsorbed SO2 molecules as well as host–guest binding dynamics. We have found that the combination of open Cu(II) sites and ligand functionalization, together with the size and geometry of metal–ligand cages, plays an integral role in the enhancement of SO2 binding.	Jul 2022
I11-High Resolution Powder Diffraction	Enhanced proton conductivity in a flexible metal-organic framework promoted by single-crystal-to-single-crystal transformation Xi Chen , Zhongyue Zhang , Jin Chen , Sergei Sapchenko , Xue Han , Ivan Da Silva , Ming Li , Inigo Vitorica-Yrezabal , George Whitehead , Chiu C. Tang , Kunio Awaga , Sihai Yang , Martin Schroeder Chemical Communications DOI: 10.1039/D0CC05270A Diamond Proposal Number(s): [22138] Show Abstract ▼ Abstract: MFM-722(Pb)-DMA undergoes a single-crystal-to-single-crystal (SCSC) transformation to give MFM-722(Pb)-H2O via ligand substitution upon exposure to water vapour. In situ single crystal impedance spectroscopy reveals an increase in proton conductivity due to this structural transition, with MFM-722(Pb)-H2O showing a proton conductivity of 6.61×10-4 S cm-1 at 50 °C and 98% RH. The low activation energy (Ea = 0.21 eV) indicates that the proton conduction follows a Grotthuss mechanism.	Nov 2020
B22-Multimode InfraRed imaging And Microspectroscopy	Observation of binding of carbon dioxide to nitro-decorated metal–organic frameworks Thien D. Duong , Sergey A. Sapchenko , Ivan Da Silva , Harry G. W. Godfrey , Yongqiang Cheng , Luke L. Daemen , Pascal Manuel , Mark D. Frogley , Gianfelice Cinque , Anibal J. Ramirez-Cuesta , Sihai Yang , Martin Schroeder Chemical Science 325 DOI: 10.1039/C9SC04294F Diamond Proposal Number(s): [14938] Open Access Show Abstract ▼ Abstract: Metal–organic frameworks (MOFs) functionalised with amine, amide and hydroxyl groups show great promise for CO2 binding due to their ability to form hydrogen bonds to CO2. Herein we report the adsorption and selectivity of CO2 in four iso-reticular MOFs adopting the NbO topology. Functionalisation of the parent MOF, MFM-102, with –NO2, –NH2 and alkyl groups leads to an enhancement of CO2 adsorption of up to 36% for the NO2-decorated MOF and with raised selectivity. MFM-102-NO2 shows the highest adsorption capacity for CO2 (184 cm3 g−1 at 273 K and 1.0 bar) within this series, comparable to the best-behaving iso-reticular MOFs. At 298 K and 1.0 bar, MFM-102-NO2 shows a CO2/CH4 selectivity of 5.0. In situ inelastic neutron scattering and synchrotron FT-IR micro-spectroscopy were employed to elucidate the host–guest interaction dynamics within CO2-loaded MFM-102-NO2. Neutron powder diffraction enabled the direct observation of the preferred binding domains in MFM-102-NO2, and, to the best of our knowledge, we report the first example of CO2 binding to a –NO2 group in a porous MOF. Synergistic effects between the –NO2 group and the open metal sites lead to optimal binding of CO2 molecules within MFM-102-NO2 via hydrogen bonding to C–H groups.	May 2020
I11-High Resolution Powder Diffraction	Iodine adsorption in a redox-active metal–organic framework: electrical conductivity induced by host−guest charge-transfer Xinran Zhang , Ivan Da Silva , Rodrigo Fazzi , Alena M. Sheveleva , Xue Han , Ben F. Spencer , Sergey A. Sapchenko , Floriana Tuna , Eric J. L. Mcinnes , Ming Li , Sihai Yang , Martin Schroder Inorganic Chemistry DOI: 10.1021/acs.inorgchem.9b02176 Diamond Proposal Number(s): [21079] Open Access Show Abstract ▼ Abstract: We report a comparative study of the binding of I2 (iodine) in a pair of redox-active metal–organic framework (MOF) materials, MFM-300(VIII) and its oxidized, deprotonated analogue, MFM-300(VIV). Adsorption of I2 in MFM-300(VIII) triggers a host-to-guest charge-transfer, accompanied by a partial (∼30%) oxidation of the VIII centers in the host framework and formation of I3– species residing in the MOF channels. Importantly, this charge-transfer induces a significant enhancement in the electrical conductivity (Δσ = 700000) of I2@MFM-300(VIII/IV) in comparison to MFM-300(VIII). In contrast, no host–guest charge-transfer or apparent change in the conductivity was observed upon adsorption of I2 in MFM-300(VIV). High-resolution synchrotron X-ray diffraction of I2@MFM-300(VIII/IV) confirms the first example of self-aggregation of adsorbed iodine species (I2 and I3–) into infinite helical chains within a MOF.	Sep 2019
I11-High Resolution Powder Diffraction	Understanding hysteresis in carbon dioxide sorption in porous metal–organic frameworks Sergey A. Sapchenko , Marina O. Barsukova , Rodion V. Belosludov , Konstantin A. Kovalenko , Denis G. Samsonenko , Artem S. Poryvaev , Alena M. Sheveleva , Matvey V. Fedin , Artem S. Bogomyakov , Danil N. Dybtsev , Martin Schroeder , Vladimir P. Fedin Inorganic Chemistry DOI: 10.1021/acs.inorgchem.9b00016 Show Abstract ▼ Abstract: Two new isostructural microporous coordination frameworks [Mn3(Hpdc)2(pdc)2] (1) and [Mg3(Hpdc)2(pdc)2] (2) (pdc2– = pyridine-2,4-dicarboxylate) showing primitive cubic (pcu) topology have been prepared and characterized. The pore aperture of the channels is too narrow for the efficient adsorption of N2; however, both compounds demonstrate substantially higher uptake of CO2 (119.9 mL·g–1 for 1 and 102.5 mL·g–1 for 2 at 195 K, 1 bar). Despite of their structural similarities, 2 shows a typical reversible type I isotherm for adsorption/desorption of CO2, while 1 features a two-step adsorption process with a very broad hysteresis between the adsorption and desorption curves. This behavior can be explained by a combination of density functional theory calculations, sorption, and X-ray diffraction analysis and gives insights into the further development of new sorbents showing adsorption/desorption hysteresis.	May 2019
B22-Multimode InfraRed imaging And Microspectroscopy I11-High Resolution Powder Diffraction	Confinement of iodine molecules into triple-helical chains within robust metal–organic frameworks Xinran Zhang , Ivan Da Silva , Harry G. W. Godfrey , Samantha K. Callear , Sergey A. Sapchenko , Yongqiang Cheng , Inigo J. Vitorica-Yrezabal , Mark D. Frogley , Gianfelice Cinque , Chiu C. Tang , Carlotta Giacobbe , Catherine Dejoie , Svemir Rudic , Anibal J. Ramirez-Cuesta , Melissa A. Denecke , Sihai Yang , Martin Schroeder Journal Of The American Chemical Society DOI: 10.1021/jacs.7b08748 Diamond Proposal Number(s): [14341, 14938] Show Abstract ▼ Abstract: During the nuclear waste disposal process, radioactive iodine in fission product can be released. The widespread implementation of sustainable nuclear energy thus requires the development of efficient iodine stores that have simultaneously high capacity, stability and more importantly, storage density (and hence minimised system volume). Here, we report high I2 adsorption in a series of robust porous metal-organic materials, MFM-300(M) (M = Al, Sc, Fe, In). MFM-300(Sc) exhibits fully reversible I2 uptake of 1.54 g g-1 and its structure remains completely unperturbed upon inclusion/removal of I2. Direct observation and quantification of the adsorption, binding domains and dynamics of guest I2 molecules within these hosts have been achieved using XPS, TGA-MS, high resolution synchrotron X-ray diffraction, pair distribution function analysis, Raman, terahertz and neutron spectroscopy, coupled with density functional theory modelling. These complimentary techniques reveal a comprehensive understanding on the host-I2 and I2-I2 binding interaction at a molecular level. The initial binding site of I2 in MFM-300(Sc), I2I, is located near the bridging hydroxyl group of the [ScO4(OH)2] moiety [I2I···H–O = 2.263(9) Å] with an occupancy of 0.268. I2II is located interstitially between two phenyl rings of neighbouring ligand molecules [I2II···phenyl ring = 3.378(9) and 4.228(5) Å]. I2II is 4.565(2) Å from the hydroxyl group with an occupancy of 0.208. Significantly, at high I2 loading an unprecedented self-aggregation of I2 molecules into triple-helical chains within the confined nano-voids has been observed at crystallographic resolution, leading to a highly efficient packing of I2 molecules with an exceptional I2 storage density of 3.08 g cm-3 in MFM-300(Sc).	Oct 2017

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