1
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Tian Y, Tao Z, Sun M, Wang T, Li L, Gu Q, Shang J. Tunable Gas Admission via a "Molecular Trapdoor" Mechanism in a Flexible Cationic Metal-Organic Framework Featuring 1D Channels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2400064. [PMID: 38530072 DOI: 10.1002/smll.202400064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/17/2024] [Indexed: 03/27/2024]
Abstract
Achieving high gas selectivity is challenging when dealing with gas pairs of similar size and physiochemical properties. The "molecular trapdoor" mechanism discovered in zeolites holds promise for highly selective gas adsorption separation but faces limitations like constrained pore volume and slow adsorption kinetics. To address these challenges, for the first time, a flexible metal-organic framework (MOF) featuring 1D channels and functioning as a "molecular trapdoor" material is intoduced. Extra-framework anions act as "gate-keeping" groups at the narrowest points of channels, permitting gas admissions via gate opening induced by thermal/pressure stimuli and guest interactions. Different guest molecules induce varied energy barriers for anion movement, enabling gas separation based on distinct threshold temperatures for gas admission. The flexible framework of Pytpy MOFs, featuring swelling structure with rotatable pyridine rings, facilitates faster gas adsorption than zeolite. Analyzing anion properties of Pytpy MOFs reveals a guiding principle for selecting anions to tailor threshold gas admission. This study not only overcomes the kinetic limitations related to gas admission in the "molecular trapdoor" zeolites but also underscores the potential of developing MOFs as molecular trapdoor adsorbents, providing valuable insights for designing ionic MOFs tailored to diverse gas separation applications.
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Affiliation(s)
- Yuanmeng Tian
- Department City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518057, P. R. China
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Zeyu Tao
- Department City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518057, P. R. China
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Mingzhe Sun
- Department City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518057, P. R. China
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Tianqi Wang
- Department City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518057, P. R. China
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Liangchun Li
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Qinfen Gu
- Australian Synchrotron, Australian Nuclear Science and Technology Organisation, 800 Blackburn Road, Clayton, Victoria, 3168, Australia
| | - Jin Shang
- Department City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518057, P. R. China
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
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2
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Marsh C, Han X, Lu Z, da Silva I, Cheng Y, Daemen LL, Day SJ, Thompson SP, Ramirez-Cuesta AJ, Yang S, Schröder M. Binding of carbon dioxide and acetylene to free carboxylic acid sites in a metal-organic framework. Chem Sci 2024; 15:8197-8203. [PMID: 38817566 PMCID: PMC11134375 DOI: 10.1039/d4sc00101j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 04/05/2024] [Indexed: 06/01/2024] Open
Abstract
The functionalisation of organic linkers in metal-organic frameworks (MOFs) to improve gas uptake is well-documented. Although the positive role of free carboxylic acid sites in MOFs for binding gas molecules has been proposed in computational studies, relatively little experimental evidence has been reported in support of this. Primarily this is because of the inherent synthetic difficulty to prepare MOF materials bearing free, accessible -COOH moieties which would normally bind to metal ions within the framework structure. Here, we describe the direct binding of CO2 and C2H2 molecules to the free -COOH sites within the pores of MFM-303(Al). MFM-303(Al) exhibits highly selective adsorption of CO2 and C2H2 with a high selectivity for C2H2 over C2H4. In situ synchrotron X-ray diffraction and inelastic neutron scattering, coupled with modelling, highlight the cooperative interactions of adsorbed CO2 and C2H2 molecules with free -COOH and -OH sites within MFM-303(Al), thus rationalising the observed high selectivity for gas separation.
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Affiliation(s)
- Christopher Marsh
- Department of Chemistry, University of Manchester Manchester M13 9PL UK
| | - Xue Han
- Department of Chemistry, University of Manchester Manchester M13 9PL UK
- College of Chemistry Beijing Normal University Beijing 100875 China
| | - Zhenzhong Lu
- Department of Chemistry, University of Manchester Manchester M13 9PL UK
| | - Ivan da Silva
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory Oxford OX11 0QX UK
| | - Yongqiang Cheng
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Luke L Daemen
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Sarah J Day
- Diamond Light Source Harwell Science Campus Oxford OX11 0DE UK
| | | | - Anibal J Ramirez-Cuesta
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Sihai Yang
- Department of Chemistry, University of Manchester Manchester M13 9PL UK
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 China
| | - Martin Schröder
- Department of Chemistry, University of Manchester Manchester M13 9PL UK
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3
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Hiraide S, Sakanaka Y, Iida Y, Arima H, Miyahara MT, Watanabe S. Theoretical isotherm equation for adsorption-induced structural transition on flexible metal-organic frameworks. Proc Natl Acad Sci U S A 2023; 120:e2305573120. [PMID: 37487093 PMCID: PMC10401030 DOI: 10.1073/pnas.2305573120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 05/30/2023] [Indexed: 07/26/2023] Open
Abstract
Flexible metal-organic frameworks (MOFs) exhibit an adsorption-induced structural transition known as "gate opening" or "breathing," resulting in an S-shaped adsorption isotherm. This unique feature of flexible MOFs offers significant advantages, such as a large working capacity, high selectivity, and intrinsic thermal management capability, positioning them as crucial candidates for revolutionizing adsorption separation processes. Therefore, the interest in the industrial applications of flexible MOFs is increasing, and the adsorption engineering for flexible MOFs is becoming important. However, despite the establishment of the theoretical background for adsorption-induced structural transitions, no theoretical equation is available to describe S-shaped adsorption isotherms of flexible MOFs. Researchers rely on various empirical equations for process simulations that can lead to unreliable outcomes or may overlook insights into improving material performance owing to parameters without physical meaning. In this study, we derive a theoretical equation based on statistical mechanics that could be a standard for the structural transition type adsorption isotherms, as the Langmuir equation represents type I isotherms. The versatility of the derived equation is shown through four examples of flexible MOFs that exhibit gate opening and breathing. The consistency of the formula with existing theories, including the osmotic free energy analysis and intrinsic thermal management capabilities, is also discussed. The developed theoretical equation may lead to more reliable and insightful outcomes in adsorption separation processes, further advancing the direction of industrial applications of flexible MOFs.
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Affiliation(s)
- Shotaro Hiraide
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto615-8510, Japan
| | - Yuta Sakanaka
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto615-8510, Japan
| | - Yuya Iida
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto615-8510, Japan
| | - Homare Arima
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto615-8510, Japan
| | - Minoru T. Miyahara
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto615-8510, Japan
| | - Satoshi Watanabe
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto615-8510, Japan
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4
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Koutsianos A, Pallach R, Frentzel-Beyme L, Das C, Paulus M, Sternemann C, Henke S. Breathing porous liquids based on responsive metal-organic framework particles. Nat Commun 2023; 14:4200. [PMID: 37452021 PMCID: PMC10349080 DOI: 10.1038/s41467-023-39887-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 06/27/2023] [Indexed: 07/18/2023] Open
Abstract
Responsive metal-organic frameworks (MOFs) that display sigmoidal gas sorption isotherms triggered by discrete gas pressure-induced structural transformations are highly promising materials for energy related applications. However, their lack of transportability via continuous flow hinders their application in systems and designs that rely on liquid agents. We herein present examples of responsive liquid systems which exhibit a breathing behaviour and show step-shaped gas sorption isotherms, akin to the distinct oxygen saturation curve of haemoglobin in blood. Dispersions of flexible MOF nanocrystals in a size-excluded silicone oil form stable porous liquids exhibiting gated uptake for CO2, propane and propylene, as characterized by sigmoidal gas sorption isotherms with distinct transition steps. In situ X-ray diffraction studies show that the sigmoidal gas sorption curve is caused by a narrow pore to large pore phase transformation of the flexible MOF nanocrystals, which respond to gas pressure despite being dispersed in silicone oil. Given the established flexible nature and tunability of a range of MOFs, these results herald the advent of breathing porous liquids whose sorption properties can be tuned rationally for a variety of technological applications.
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Affiliation(s)
- Athanasios Koutsianos
- Anorganische Chemie, Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Roman Pallach
- Anorganische Chemie, Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Louis Frentzel-Beyme
- Anorganische Chemie, Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Chinmoy Das
- Anorganische Chemie, Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Michael Paulus
- Fakultät Physik/DELTA, Technische Universität Dortmund, Maria-Goeppert-Mayer Str. 2, 44221, Dortmund, Germany
| | - Christian Sternemann
- Fakultät Physik/DELTA, Technische Universität Dortmund, Maria-Goeppert-Mayer Str. 2, 44221, Dortmund, Germany
| | - Sebastian Henke
- Anorganische Chemie, Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany.
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5
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López-Cervantes VB, Bara D, Yañez-Aulestia A, Martínez-Ahumada E, López-Olvera A, Amador-Sánchez YA, Solis-Ibarra D, Sánchez-González E, Ibarra IA, Forgan RS. Modulated self-assembly of three flexible Cr(III) PCPs for SO 2 adsorption and detection. Chem Commun (Camb) 2023; 59:8115-8118. [PMID: 37306073 PMCID: PMC10297829 DOI: 10.1039/d3cc01685d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/01/2023] [Indexed: 06/13/2023]
Abstract
Modulated self-assembly protocols are used to develop facile, HF-free syntheses of the archetypal flexible PCP, MIL-53(Cr), and novel isoreticular analogues MIL-53(Cr)-Br and MIL-53(Cr)-NO2. All three PCPs show good SO2 uptake (298 K, 1 bar) and high chemical stabilities against dry and wet SO2. Solid-state photoluminescence spectroscopy indicates all three PCPs exhibit turn-off sensing of SO2, in particular MIL-53(Cr)-Br, which shows a 2.7-fold decrease in emission on exposure to SO2 at room temperature, indicating potential sensing applications.
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Affiliation(s)
- Valeria B López-Cervantes
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacan, 04510, Ciudad de Mexico, Mexico.
| | - Dominic Bara
- WestCHEM School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK.
| | - Ana Yañez-Aulestia
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacan, 04510, Ciudad de Mexico, Mexico.
| | - Eva Martínez-Ahumada
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacan, 04510, Ciudad de Mexico, Mexico.
| | - Alfredo López-Olvera
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacan, 04510, Ciudad de Mexico, Mexico.
| | - Yoarhy A Amador-Sánchez
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacan, 04510, Ciudad de Mexico, Mexico.
| | - Diego Solis-Ibarra
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacan, 04510, Ciudad de Mexico, Mexico.
| | - Elí Sánchez-González
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacan, 04510, Ciudad de Mexico, Mexico.
| | - Ilich A Ibarra
- Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacan, 04510, Ciudad de Mexico, Mexico.
| | - Ross S Forgan
- WestCHEM School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK.
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6
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Maity R, Gholami M, Peter SA, Schoukens M, Tiriana S, Baron GV, Denayer JFM. Strategic Fast Induction Heating to Combat Hysteresis Barriers in a Flexible MOF for Rapid CO 2 Desorption in Biogas Upgrading. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2302893. [PMID: 37183271 DOI: 10.1002/smll.202302893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Indexed: 05/16/2023]
Abstract
A major challenge in Cyclic Swing Separation using flexible adsorbents that have high equilibrium CO2 adsorption capacity is their very low-pressure hysteresis that hinders efficient desorption. Mg-Gallate MOF is such a flexible adsorbent that only begins to release CO2 at its pore closing pressure at 0.08 bar and 30 °C, showing very slow and inefficient desorption in pressure or temperature swing. Therefore, a novel strategy is presented that combines state of art technique Magnetic Induction Heating with a vacuum swing for fast and efficient CO2 desorption from flexible adsorbents at a moderately elevated temperature (70 °C).
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Affiliation(s)
- Rahul Maity
- Department of Chemical Engineering (CHIS), Vrije Universiteit Brussel, Brussels, 1050, Belgium
| | - Mohsen Gholami
- Department of Chemical Engineering (CHIS), Vrije Universiteit Brussel, Brussels, 1050, Belgium
| | - Sunil A Peter
- Department of Chemical Engineering (CHIS), Vrije Universiteit Brussel, Brussels, 1050, Belgium
| | - Matthias Schoukens
- Department of Chemical Engineering (CHIS), Vrije Universiteit Brussel, Brussels, 1050, Belgium
| | - Segato Tiriana
- Service Materials Engineering, Characterization, Synthesis, and, Recycling (4MAT), Université Libre de Bruxelles, Brussels, 1050, Belgium
| | - Gino V Baron
- Department of Chemical Engineering (CHIS), Vrije Universiteit Brussel, Brussels, 1050, Belgium
| | - Joeri F M Denayer
- Department of Chemical Engineering (CHIS), Vrije Universiteit Brussel, Brussels, 1050, Belgium
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7
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Keyvanloo Z, Nakhaei Pour A, Moosavi F. Adsorption and diffusion of the H2/CO2/CO/MeOH/EtOH mixture into the ZIF-7 using molecular simulation. J Mol Graph Model 2022; 116:108275. [PMID: 35858495 DOI: 10.1016/j.jmgm.2022.108275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/09/2022] [Accepted: 07/11/2022] [Indexed: 12/15/2022]
Abstract
The adsorption and diffusion of synthesis gas components (methanol, ethanol, H2, CO2, and CO molecules) in ZIF-7 by grand canonical Monte Carlo and molecular dynamics simulation were investigated. The initial diffusion coefficient at the beginning of the process depends on the kinetic diameter of the guest molecules. Also, the diffusion coefficient at equilibrium conditions probably depends on the interaction between the guest molecules with the ZIF-7 framework. The radial distribution function results indicate that the distribution of guest molecules in the framework is affected by the interaction between the guest molecules. These results indicate that the CO, CO2, and H2 guest molecules are adsorbed on both the Zn metal atom and the organic linker (especially the C1 atom). In contrast, the organic linker is the most favorable adsorption site for methanol and ethanol guest molecules. In addition, the diffusion coefficient of guest molecules in binary mixtures is related to the attraction or repulsion between the guest molecules.
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Affiliation(s)
- Zahra Keyvanloo
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Ali Nakhaei Pour
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
| | - Fateme Moosavi
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
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8
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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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9
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Chen K, Mousavi SH, Singh R, Snurr RQ, Li G, Webley PA. Gating effect for gas adsorption in microporous materials-mechanisms and applications. Chem Soc Rev 2022; 51:1139-1166. [PMID: 35040460 DOI: 10.1039/d1cs00822f] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In the past two decades, various microporous materials have been developed as useful adsorbents for gas adsorption for a wide range of industries. Considerable efforts have been made to regulate the pore accessibility in microporous materials for the manipulation of guest molecules' admission and release. It has long been known that some microporous adsorbents suddenly become highly accessible to guest molecules at specific conditions, e.g., above a threshold pressure or temperature. This anomalous adsorption behavior results from a gating effect, where a structural variation of the adsorbent leads to an abrupt change in the gas admission. This review summarizes the mechanisms of the gating effect, which can be a result of the deformation of the framework (e.g., expansion, contraction, reorientation, and sliding of the unit cells), the vibration of the pore-keeping groups (e.g., rotation, swing, and collapse of organic linkers), and the oscillation of the pore-keeping ions (e.g. cesium, potassium, etc.). These structural variations are induced either by the host-guest interaction or by an external stimulus, such as temperature or light, and account for the gating effect at a threshold value of the stimulus. Emphasis is given to the temperature-regulated gating effect, where the critical admission temperature is dictated by the combined effect of the gate opening and thermodynamic factors and plays a key role in regulating guest admission. Molecular simulations can improve our understanding of the gate opening/closing transitions at the atomic scale and enable the construction of quantitative models to describe the gated adsorption behaviour at the macroscale level. The gating effect in porous materials has been widely applied in highly selective gas separation and offers great potential for gas storage and sensing.
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Affiliation(s)
- Kaifei Chen
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Seyed Hesam Mousavi
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Ranjeet Singh
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Randall Q Snurr
- Department of Chemical & Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - Gang Li
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Paul A Webley
- Department of Chemical and Biological Engineering, Monash University, VIC 3800, Australia.
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10
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Albalad J, Peralta RA, Huxley MT, Tsoukatos S, Shi Z, Zhang YB, Evans JD, Sumby CJ, Doonan CJ. Coordination modulated on-off switching of flexibility in a metal-organic framework. Chem Sci 2021; 12:14893-14900. [PMID: 34820105 PMCID: PMC8597854 DOI: 10.1039/d1sc04712d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/10/2021] [Indexed: 02/01/2023] Open
Abstract
Stimuli-responsive metal-organic frameworks (MOFs) exhibit dynamic, and typically reversible, structural changes upon exposure to external stimuli. This process often induces drastic changes in their adsorption properties. Herein, we present a stimuli-responsive MOF, 1·[CuCl], that shows temperature dependent switching from a rigid to flexible phase. This conversion is associated with a dramatic reversible change in the gas adsorption properties, from Type-I to S-shaped isotherms. The structural transition is facilitated by a novel mechanism that involves both a change in coordination number (3 to 2) and geometry (trigonal planar to linear) of the post-synthetically added Cu(i) ion. This process serves to 'unlock' the framework rigidity imposed by metal chelation of the bis-pyrazolyl groups and realises the intrinsic flexibility of the organic link.
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Affiliation(s)
- Jorge Albalad
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide North Terrace Adelaide SA 5000 Australia
| | - Ricardo A Peralta
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide North Terrace Adelaide SA 5000 Australia
| | - Michael T Huxley
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide North Terrace Adelaide SA 5000 Australia
| | - Steven Tsoukatos
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide North Terrace Adelaide SA 5000 Australia
| | - Zhaolin Shi
- School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 China
| | - Yue-Biao Zhang
- School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 China
| | - Jack D Evans
- Department of Inorganic Chemistry, Technische Universität Dresden 01062 Dresden Germany
| | - Christopher J Sumby
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide North Terrace Adelaide SA 5000 Australia
| | - Christian J Doonan
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide North Terrace Adelaide SA 5000 Australia
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11
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Goeminne R, Krause S, Kaskel S, Verstraelen T, Evans JD. Charting the Complete Thermodynamic Landscape of Gas Adsorption for a Responsive Metal-Organic Framework. J Am Chem Soc 2021; 143:4143-4147. [PMID: 33719416 PMCID: PMC9115754 DOI: 10.1021/jacs.1c00522] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Indexed: 11/30/2022]
Abstract
New nanoporous materials have the ability to revolutionize adsorption and separation processes. In particular, materials with adaptive cavities have high selectivity and may display previously undiscovered phenomena, such as negative gas adsorption (NGA), in which gas is released from the framework upon an increase in pressure. Although the thermodynamic driving force behind this and many other counterintuitive adsorption phenomena have been thoroughly investigated in recent years, several experimental observations remain difficult to explain. This necessitates a comprehensive analysis of gas adsorption akin to the conformational free energy landscapes used to understand the function of proteins. We have constructed the complete thermodynamic landscape of methane adsorption on DUT-49. Traversing this complex landscape reproduces the experimentally observed structural transitions, temperature dependence, and the hysteresis between adsorption and desorption. The complete thermodynamic description presented here provides unparalleled insight into adsorption and provides a framework to understand other adsorbents that challenge our preconceptions.
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Affiliation(s)
- Ruben Goeminne
- Center
for Molecular Modeling, Ghent University, Tech Lane, Ghent Science Park Campus
A, 9052 Zwijnaarde, Belgium
| | - Simon Krause
- Stratingh
Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
| | - Stefan Kaskel
- Department
of Inorganic Chemistry, Technische Universität
Dresden Bergstraße
66, 01062 Dresden, Germany
| | - Toon Verstraelen
- Center
for Molecular Modeling, Ghent University, Tech Lane, Ghent Science Park Campus
A, 9052 Zwijnaarde, Belgium
| | - Jack D. Evans
- Department
of Inorganic Chemistry, Technische Universität
Dresden Bergstraße
66, 01062 Dresden, Germany
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12
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Albalad J, Sumby CJ, Maspoch D, Doonan CJ. Elucidating pore chemistry within metal–organic frameworks via single crystal X-ray diffraction; from fundamental understanding to application. CrystEngComm 2021. [DOI: 10.1039/d1ce00067e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The application of metal–organic frameworks (MOFs) to diverse chemical sectors is aided by their crystallinity, which permits the use of X-ray crystallography to characterise their pore chemistry and provides invaluable insight into their properties.
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Affiliation(s)
- Jorge Albalad
- Department of Chemistry and Centre for Advanced Nanomaterials
- The University of Adelaide
- Adelaide
- Australia
| | - Christopher J. Sumby
- Department of Chemistry and Centre for Advanced Nanomaterials
- The University of Adelaide
- Adelaide
- Australia
| | - Daniel Maspoch
- Catalan Institute of Nanoscience and Nanotechnology (ICN2)
- CSIC
- Barcelona Institute of Science and Technology
- Barcelona
- Spain
| | - Christian J. Doonan
- Department of Chemistry and Centre for Advanced Nanomaterials
- The University of Adelaide
- Adelaide
- Australia
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13
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Yang X, Arami-Niya A, Xiao G, May EF. Flexible Adsorbents at High Pressure: Observations and Correlation of ZIF-7 Stepped Sorption Isotherms for Nitrogen, Argon, and Other Gases. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:14967-14977. [PMID: 33256411 DOI: 10.1021/acs.langmuir.0c02279] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Stepped adsorption isotherms with desorption hysteresis were measured for nitrogen, argon, ethane, carbon dioxide, and methane at pressures up to 17 MPa on zeolitic imidazolate framework-7 (ZIF-7) using a gravimetric sorption analyzer. Such stepped sorption isotherms have not been previously reported for nitrogen or argon on ZIF-7, and required the application of pressures as high as 15 MPa to trigger the ZIF-7 structural phase transition at temperatures around 360 K. The stepped hysteretic sorption isotherms measured for carbon dioxide, methane, and ethane were consistent with previous observations reported in the literature. To correlate these stepped hysteretic sorption isotherms, a semi-empirical model was developed by combining a three-parameter Langmuir equation to describe the Type I aspect of the isotherm, with a model designed to describe the temperature-dependent ZIF-7 structural phase transition. Excellent fits of the combined adsorption and desorption branches were achieved by adjusting nine parameters in the temperature-dependent model, with root-mean-square deviations within 2.5 % of the highest measured adsorption capacity. Each parameter of the new semi-empirical model has a physical basis, allowing them to be estimated or compared independently.
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Affiliation(s)
- Xiaoxian Yang
- Fluid Science & Resources Division, Department of Chemical Engineering, University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Arash Arami-Niya
- Fluid Science & Resources Division, Department of Chemical Engineering, University of Western Australia, Crawley, Western Australia 6009, Australia
- Discipline of Chemical Engineering, Western Australian School of Mines: Minerals, Energy, and Chemical Engineering, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia
| | - Gongkui Xiao
- Fluid Science & Resources Division, Department of Chemical Engineering, University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Eric F May
- Fluid Science & Resources Division, Department of Chemical Engineering, University of Western Australia, Crawley, Western Australia 6009, Australia
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