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Ajibade S, Catalano L, Kölbel J, Mittleman DM, Ruggiero MT. Terahertz Spectroscopy Unambiguously Determines the Orientation of Guest Water Molecules in a Structurally Elusive Metal-Organic Framework. J Phys Chem Lett 2024; 15:5549-5555. [PMID: 38753602 PMCID: PMC11129291 DOI: 10.1021/acs.jpclett.4c00706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/19/2024] [Accepted: 04/26/2024] [Indexed: 05/18/2024]
Abstract
Porous materials, particularly metal-organic frameworks (MOFs), hold great promise for advanced applications. MIL-53(Al) is an exceptionally well-studied MOF that exhibits a phase transition upon guest capture─in this case, water─resulting in a dramatic change in the pore volume. Despite extensive studies, the structure of the water-loaded narrow-pore phase, MIL-53(Al)-np, remains controversial, particularly with respect to the positions of the adsorbed water molecules. We use terahertz spectroscopy, coupled with powder X-ray diffraction and density functional theory simulations, to unambiguously resolve this controversy. We show that the low-frequency (<100 cm-1) vibrational spectrum depends on weak long-range forces that are extremely sensitive to the orientation of the adsorbed water molecules. This enables definitively determining the correct structure of MIL-53(Al)-np while highlighting the extreme sensitivity of terahertz spectroscopy to bulk structure, suggesting its potential as a robust complement to X-ray diffraction for precise characterization of host-guest complexes.
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Affiliation(s)
- Saheed
A. Ajibade
- Department
of Chemistry, University of Vermont, Burlington, Vermont 05405, United States
| | - Luca Catalano
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
- Department
of Life Sciences, University of Modena and
Reggio Emilia, 41125 Modena, Italy
| | - Johanna Kölbel
- School
of Engineering, Brown University, Providence, Rhode Island 02912, United States
| | - Daniel M. Mittleman
- School
of Engineering, Brown University, Providence, Rhode Island 02912, United States
| | - Michael T. Ruggiero
- Department
of Chemistry, University of Vermont, Burlington, Vermont 05405, United States
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
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Li Y, Wang Y, Fan W, Sun D. Flexible metal-organic frameworks for gas storage and separation. Dalton Trans 2022; 51:4608-4618. [PMID: 35225319 DOI: 10.1039/d1dt03842g] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Flexible metal-organic frameworks (MOFs) have gradually attracted much attention due to their reversible structural changes and flexible structural responses. The basic research of flexible MOFs is to study their dynamic responses under different external stimuli and translate the responses into applications. Most research studies on flexible MOFs focus on gas storage and separation, but lack a systematic summary. Here, we review the development of flexible MOFs, the structural transformation under the external effects of temperature, pressure, and guest molecules, and their applications in gas storage and separation. Microporous MOFs with flexible structures provide unique opportunities for fine-tuning their performance because the pore shape and size can be controlled by external stimuli. The characteristics of breathing phenomena and large specific surface area make flexible MOFs suitable candidates for gas storage and separation. Finally, the application prospects of flexible MOFs are reported.
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Affiliation(s)
- Yue Li
- State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Yutong Wang
- State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Weidong Fan
- State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, P. R. China.
| | - Daofeng Sun
- State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, P. R. China.
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Isaeva VI, Kulaishin SA, Vedenyapina MD, Chernyshev VV, Kapustin GI, Vergun VV, Kustov LM. Influence of the porous structure and functionality of the MIL type metal-organic frameworks and carbon matrices on the adsorption of 2,4-dichlorophenoxyacetic acid. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3058-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Boulé R, Roiland C, Bataille T, Le Pollés L, Audebrand N, Ghoufi A. Anomalous Dynamics of a Nanoconfined Gas in a Soft Metal-Organics Framework. J Phys Chem Lett 2019; 10:1698-1708. [PMID: 30913385 DOI: 10.1021/acs.jpclett.9b00421] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Dynamics of confined molecules within porous materials is equally important as local structural order, and it is necessary to quantify it and to reveal the microscopic mechanisms ruling it for better control of adsorption applications. In this study, molecular dynamics simulations were carried out to investigate the translational and the rotational dynamics of methanol trapped into the flexible NH2-MIL-53(Al) metal-organics framework (MOF). Indeed, atomistic simulation is nowadays a relevant tool to explore matter at the nanoscale. Very recently it has been shown that the NH2-MIL-53(Al) MOF material was capable to undergo a reversible structural transition (breathing phenomenon) by combining adsorption and thermal stimuli. This flexibility can drastically affect the dynamics of confined molecules and therefore the successful conduct of adsorption applications such as gas storage and separation. Rotational and translational dynamics of confined methanol through nanoporous flexible NH2-MIL-53(Al) MOF were then deeply investigated by exploring a broad range of dynamical properties to extract the molecular mechanisms ruling them. This study allowed us to shed light on the interplay of dynamics of confined fluids and flexibility of porous material and to highlight the physical insights in diffusion mechanisms of confined molecules. Anomalous translational diffusion was evidenced due to a dynamical heterogeneity caused by a combination of a localized dynamics at the subnanometric scale and translational jumps between nanodomains in a zigzag scheme between the hydroxide group of the NH2-MIL-53(Al). Actually, the non-Fickian dynamics of methanol is the result of the specific host-guest interactions and the MOF flexibility involving the pore opening. Eventually, decoupling between both rotational and translational dynamics related to breaking in the Stokes-Einstein relation was highlighted.
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Affiliation(s)
- Roald Boulé
- Univ Rennes, CNRS, ENSCR, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , F-35000 Rennes , France
| | - Claire Roiland
- Univ Rennes, CNRS, ENSCR, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , F-35000 Rennes , France
| | - Thierry Bataille
- Univ Rennes, CNRS, ENSCR, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , F-35000 Rennes , France
| | - Laurent Le Pollés
- Univ Rennes, CNRS, ENSCR, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , F-35000 Rennes , France
| | - Nathalie Audebrand
- Univ Rennes, CNRS, ENSCR, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , F-35000 Rennes , France
| | - Aziz Ghoufi
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251 , F-35000 Rennes , France
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Wu H, Salles F, Zajac J. A Critical Review of Solid Materials for Low-Temperature Thermochemical Storage of Solar Energy Based on Solid-Vapour Adsorption in View of Space Heating Uses. Molecules 2019; 24:E945. [PMID: 30866556 PMCID: PMC6429295 DOI: 10.3390/molecules24050945] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 02/26/2019] [Accepted: 03/02/2019] [Indexed: 02/04/2023] Open
Abstract
The present report deals with low-temperature thermochemical storage for space heating, which is based on the principles of vapour adsorption onto solid adsorbents. With the aim of obtaining comprehensive information on the rationalized selection of adsorbents for heat storage in open sorption systems operating in the moist-air flow mode, various materials reported up to now in the literature are reviewed by referring strictly to the possible mechanisms of water vapour adsorption, as well as practical aspects of their preparation or their application under particular operating conditions. It seems reasonable to suggest that, on the basis of the current state-of-the-art, the adsorption phenomenon may be rather exploited in the auxiliary heating systems, which provide additional heat during winter's coldest days.
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Affiliation(s)
- Hao Wu
- Institut Charles Gerhardt Montpellier ⁻ UMR CNRS 5253, UM, ENSCM, Place E. Bataillon, CEDEX 05, 34095 Montpellier, France.
| | - Fabrice Salles
- Institut Charles Gerhardt Montpellier ⁻ UMR CNRS 5253, UM, ENSCM, Place E. Bataillon, CEDEX 05, 34095 Montpellier, France.
| | - Jerzy Zajac
- Institut Charles Gerhardt Montpellier ⁻ UMR CNRS 5253, UM, ENSCM, Place E. Bataillon, CEDEX 05, 34095 Montpellier, France.
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