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Daglar H, Gulbalkan HC, Aksu GO, Keskin S. Computational Simulations of Metal-Organic Frameworks to Enhance Adsorption Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2405532. [PMID: 39072794 DOI: 10.1002/adma.202405532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 07/08/2024] [Indexed: 07/30/2024]
Abstract
Metal-organic frameworks (MOFs), renowned for their exceptional porosity and crystalline structure, stand at the forefront of gas adsorption and separation applications. Shortly after their discovery through experimental synthesis, computational simulations quickly become an important method in broadening the use of MOFs by offering deep insights into their structural, functional, and performance properties. This review specifically addresses the pivotal role of molecular simulations in enlarging the molecular understanding of MOFs and enhancing their applications, particularly for gas adsorption. After reviewing the historical development and implementation of molecular simulation methods in the field of MOFs, high-throughput computational screening (HTCS) studies used to unlock the potential of MOFs in CO2 capture, CH4 storage, H2 storage, and water harvesting are visited and recent advancements in these adsorption applications are highlighted. The transformative impact of integrating artificial intelligence with HTCS on the prediction of MOFs' performance and directing the experimental efforts on promising materials is addressed. An outlook on current opportunities and challenges in the field to accelerate the adsorption applications of MOFs is finally provided.
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Affiliation(s)
- Hilal Daglar
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul, 34450, Turkey
| | - Hasan Can Gulbalkan
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul, 34450, Turkey
| | - Gokhan Onder Aksu
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul, 34450, Turkey
| | - Seda Keskin
- Department of Chemical and Biological Engineering, Koç University, Rumelifeneri Yolu, Sariyer, Istanbul, 34450, Turkey
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2
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Walenszus F, Bon V, De A, Kaskel S. Amplification of negative gas adsorption in a multivariate framework. Chem Commun (Camb) 2024; 60:7886-7889. [PMID: 38982900 DOI: 10.1039/d4cc02540g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
The approach of employing multivariate MOFs was used to fine-tune the mechanical properties of the flexible framework DUT-49. In situ XRD, NMR and physisorption studies showed that the partial incorporation of a more rigid linker into the DUT-49 framework enables stabilization of the metastable open pore phase, which led to a two-fold amplification of the expelled gas amount upon the "negative gas adsorption" transition.
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Affiliation(s)
- Francesco Walenszus
- Center of Inorganic Chemistry I, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany
| | - Volodymyr Bon
- Center of Inorganic Chemistry I, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany
| | - Ankita De
- Center of Inorganic Chemistry I, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany
| | - Stefan Kaskel
- Center of Inorganic Chemistry I, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany
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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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Walenszus F, Bon V, Evans JD, Krause S, Getzschmann J, Kaskel S, Dvoyashkin M. On the role of history-dependent adsorbate distribution and metastable states in switchable mesoporous metal-organic frameworks. Nat Commun 2023; 14:3223. [PMID: 37270577 DOI: 10.1038/s41467-023-38737-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 05/10/2023] [Indexed: 06/05/2023] Open
Abstract
A unique feature of metal-organic frameworks (MOFs) in contrast to rigid nanoporous materials is their structural switchabilty offering a wide range of functionality for sustainable energy storage, separation and sensing applications. This has initiated a series of experimental and theoretical studies predominantly aiming at understanding the thermodynamic conditions to transform and release gas, but the nature of sorption-induced switching transitions remains poorly understood. Here we report experimental evidence for fluid metastability and history-dependent states during sorption triggering the structural change of the framework and leading to the counterintuitive phenomenon of negative gas adsorption (NGA) in flexible MOFs. Preparation of two isoreticular MOFs differing by structural flexibility and performing direct in situ diffusion studies aided by in situ X-ray diffraction, scanning electron microscopy and computational modelling, allowed assessment of n-butane molecular dynamics, phase state, and the framework response to obtain a microscopic picture for each step of the sorption process.
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Affiliation(s)
- Francesco Walenszus
- Department of Inorganic Chemistry, Technische Universität Dresden, 01069, Dresden, Germany
| | - Volodymyr Bon
- Department of Inorganic Chemistry, Technische Universität Dresden, 01069, Dresden, Germany
| | - Jack D Evans
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide, Adelaide, SA, 5000, Australia
| | - Simon Krause
- Nanochemistry department, Max Planck Institute for Solid State Research, 70569, Stuttgart, Germany
| | - Jürgen Getzschmann
- Department of Inorganic Chemistry, Technische Universität Dresden, 01069, Dresden, Germany
| | - Stefan Kaskel
- Department of Inorganic Chemistry, Technische Universität Dresden, 01069, Dresden, Germany.
- Fraunhofer Institute IWS, Winterbergstr. 28, 01277, Dresden, Germany.
| | - Muslim Dvoyashkin
- Institute of Chemical Technology, Universität Leipzig, 04103, Leipzig, Germany.
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5
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Zhao H, Pelgrin-Morvan C, Maurin G, Ghoufi A. Cutting-edge molecular modelling to unveil new microscopic insights into the guest-controlled flexibility of metal-organic frameworks. Chem Sci 2022; 13:14336-14345. [PMID: 36545142 PMCID: PMC9749138 DOI: 10.1039/d2sc04174j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/01/2022] [Indexed: 11/16/2022] Open
Abstract
Metal-organic frameworks are a class of porous solids that exhibit intriguing flexibility under stimuli, leading often to reversible giant structural changes upon guest adsorption. DUT-49(Cu) and MIL-53(Cr) are fascinating flexible MOFs owing to their guest-induced breathing and negative gas adsorption behaviors respectively. Molecular simulation is one of the most relevant tools to examine these phenomena at the atomistic scale and gain a unique understanding of the physics behind them. Although molecular dynamics and Monte Carlo simulations are widely used in the field of porous materials, these methods hardly consider the structural deformation of a soft material upon guest adsorption. In this work, a cutting-edge osmotic molecular dynamics approach is developed to consider simultaneously the fluid adsorption process and material flexibility. We demonstrate that this newly developed computational strategy offers a unique opportunity to gain unprecedented molecular insights into the flexibility of this class of materials.
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Affiliation(s)
- Hengli Zhao
- Institut de Physique de Rennes, IPR, CNRS-Université de Rennes 1, UMR CNRS 6251 35042 Rennes France
- ICGM, Univ. Montpellier, CNRS, ENSCM Montpellier 34293 France
| | - Camille Pelgrin-Morvan
- Institut de Physique de Rennes, IPR, CNRS-Université de Rennes 1, UMR CNRS 6251 35042 Rennes France
| | | | - Aziz Ghoufi
- Institut de Physique de Rennes, IPR, CNRS-Université de Rennes 1, UMR CNRS 6251 35042 Rennes France
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6
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Bon V, Busov N, Senkovska I, Bönisch N, Abylgazina L, Khadiev A, Novikov D, Kaskel S. The importance of crystal size for breathing kinetics in MIL-53(Al). Chem Commun (Camb) 2022; 58:10492-10495. [PMID: 36043355 DOI: 10.1039/d2cc02662g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we analyze the switching kinetics of a breathing framework MIL-53(Al) with respect to different crystallite size regimes. Synchrotron time-resolved powder X-ray diffraction (PXRD) and adsorption rate analysis of n-butane physisorption at 298 K demonstrate the decisive role of crystal size affecting the time domain of breathing transitions in MIL-53(Al).
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Affiliation(s)
- Volodymyr Bon
- Chair of Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany.
| | - Nikita Busov
- Chair of Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany.
| | - Irena Senkovska
- Chair of Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany.
| | - Nadine Bönisch
- Chair of Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany.
| | - Leila Abylgazina
- Chair of Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany.
| | - Azat Khadiev
- P23 group, Petra III Synchrotron, DESY, Notkestraße 85, 22607, Hamburg, Germany
| | - Dmitri Novikov
- P23 group, Petra III Synchrotron, DESY, Notkestraße 85, 22607, Hamburg, Germany
| | - Stefan Kaskel
- Chair of Inorganic Chemistry I, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany.
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7
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Küçük H. The small gas activities on different number of nitrogen atom doping to Cobalt embedded graphene. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Krause S, Evans JD, Bon V, Crespi S, Danowski W, Browne WR, Ehrling S, Walenszus F, Wallacher D, Grimm N, Többens DM, Weiss MS, Kaskel S, Feringa BL. Cooperative light-induced breathing of soft porous crystals via azobenzene buckling. Nat Commun 2022; 13:1951. [PMID: 35414051 PMCID: PMC9005654 DOI: 10.1038/s41467-022-29149-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 01/28/2022] [Indexed: 12/04/2022] Open
Abstract
Although light is a prominent stimulus for smart materials, the application of photoswitches as light-responsive triggers for phase transitions of porous materials remains poorly explored. Here we incorporate an azobenzene photoswitch in the backbone of a metal-organic framework producing light-induced structural contraction of the porous network in parallel to gas adsorption. Light-stimulation enables non-invasive spatiotemporal control over the mechanical properties of the framework, which ultimately leads to pore contraction and subsequent guest release via negative gas adsorption. The complex mechanism of light-gated breathing is established by a series of in situ diffraction and spectroscopic experiments, supported by quantum mechanical and molecular dynamic simulations. Unexpectedly, this study identifies a novel light-induced deformation mechanism of constrained azobenzene photoswitches relevant to the future design of light-responsive materials.
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Affiliation(s)
- Simon Krause
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Bergstrasse 66, 01062, Dresden, Germany.
- Nanochemistry Department, Max-Planck-Institute for Solid State Research, Heisenbergstraße 1, 70569, Stuttgart, Germany.
| | - Jack D Evans
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Bergstrasse 66, 01062, Dresden, Germany
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide, North Terrace, Adelaide, South Australia, 5000, Australia
| | - Volodymyr Bon
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Bergstrasse 66, 01062, Dresden, Germany
| | - Stefano Crespi
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Wojciech Danowski
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Wesley R Browne
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Sebastian Ehrling
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Bergstrasse 66, 01062, Dresden, Germany
| | - Francesco Walenszus
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Bergstrasse 66, 01062, Dresden, Germany
| | - Dirk Wallacher
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Nico Grimm
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Daniel M Többens
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Manfred S Weiss
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Stefan Kaskel
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Bergstrasse 66, 01062, Dresden, Germany.
| | - Ben L Feringa
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
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9
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Alexandrov EV, Yang Y, Liang L, Wang J, Blatov VA. Topological transformations in metal–organic frameworks: a prospective design route? CrystEngComm 2022. [DOI: 10.1039/d2ce00264g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We apply a topological approach based on the underlying net and transformation pattern concepts as well as on the ‘supernet–subnet’ formalism to uncover mechanisms of solid-state transformations in coordination polymers and metal–organic frameworks.
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Affiliation(s)
- Eugeny V. Alexandrov
- Samara Center for Theoretical Materials Science (SCTMS), Samara State Technical University, Molodogvardeyskaya St. 244, Samara, 443100, Russian Federation
- Samara Branch of P.N. Lebedev Physical Institute of the Russian Academy of Science, Novo-Sadovaya St. 221, Samara 443011, Russian Federation
| | - Yumin Yang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Lili Liang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Junjie Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Vladislav A. Blatov
- Samara Center for Theoretical Materials Science (SCTMS), Samara State Technical University, Molodogvardeyskaya St. 244, Samara, 443100, Russian Federation
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
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Abstract
Many of the proposed applications of metal-organic framework (MOF) materials may fail to materialize if the community does not fully address the difficult fundamental work needed to map out the 'time gap' in the literature - that is, the lack of investigation into the time-dependent behaviours of MOFs as opposed to equilibrium or steady-state properties. Although there are a range of excellent investigations into MOF dynamics and time-dependent phenomena, these works represent only a tiny fraction of the vast number of MOF studies. This Review provides an overview of current research into the temporal evolution of MOF structures and properties by analysing the time-resolved experimental techniques that can be used to monitor such behaviours. We focus on innovative techniques, while also discussing older methods often used in other chemical systems. Four areas are examined: MOF formation, guest motion, electron motion and framework motion. In each area, we highlight the disparity between the relatively small amount of (published) research on key time-dependent phenomena and the enormous scope for acquiring the wider and deeper understanding that is essential for the future of the field.
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Guillerm V, Eddaoudi M. The Importance of Highly Connected Building Units in Reticular Chemistry: Thoughtful Design of Metal-Organic Frameworks. Acc Chem Res 2021; 54:3298-3312. [PMID: 34227389 DOI: 10.1021/acs.accounts.1c00214] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The prediction of crystal structures assembled in three dimensions has been considered for a long time, simultaneously as a chemical wasteland and a certain growth point of the chemistry of the future. Less than 30 years after Roald Hoffmann's statement, we can categorically affirm that the elevation of reticular chemistry and the introduction of metal-organic frameworks (MOFs) significantly tackled this tridimensional assembly issue. MOFs result from the assembly of organic polytopic organic ligands bridging metal nodes, clusters, chains, or layers together into mostly three-periodic open frameworks. They can exhibit extremely high porosity and offer great potential as revolutionary catalysts, drug carrier systems, sensors, smart materials, and, of course, separation agents. Overall, the progressive development of reticular chemistry has been a game changer in materials chemistry during the last 25 years.Such diverse properties often result not only from the selected organic and inorganic molecular building blocks (MBBs) but also from their distribution within the framework. Indeed, the size and shape of the porous system, as well as the location of active sites influence the overall properties. Therefore, in the continuity of achieving the crystallization of three-periodic structures, chemists and crystal engineers faced the next challenge, as summarized by John Maddox: "it remains in general impossible to predict the structure of even the simplest crystallographic solids from knowledge of their chemical composition". This is where rational design takes place.In this Account, we detail three specific approaches developed by our group to facilitate the design and assembly of finely tuned MOFs. All are based on careful geometrical consideration and a deep study and understanding of the existing nets and topologies. We recognized that highly connected nets, if possible, edge-transitive, are ideal blueprints because their number is limited in contrast to nets with lower connectivity. Therefore, we embarked on taking advantage of existing highly connected MBBs, or, in parallel, promoting their formation to meet our requirements. This is achieved by utilizing externally decorated metal-organic polyhedra as supermolecular building blocks (SBBs), serving as a net-coding building unit, comprising the requisite connectivity and directional information coding for the chosen nets. The SBB approach allowed the synthesis of several families of SBB-based MOFs, including fcu, rht, and gea-MOFs, that are detailed here.The second strategy is directly inherited from the success of the SBB approach. In seeking highly connected building units, our group naturally expanded its research focus to nets that can be deconstructed into layers, pillared in various ways. In the supermolecular building layer (SBL) approach, the layers have an almost infinite connectivity, and the framework backbone is fixed in two dimensions while the third is free for pillar expansion and functionalization. The cases of trigonal pillaring leading to rtl, eea, and apo MOFs as well as the quadrangular pillaring leading to a family of tbo-MOFs are discussed here, along with recent cases of highly connected pillars in pek and aea-MOFs.Finally, our experience with highly coordinated MBBs led us to develop a novel way to use them as secondary building units of lower connectivity and unlock the possibility of assembling a novel class of zeolite-like MOFs (ZMOFs). The case of the Zr-sod-ZMOFs designed through a cantellation strategy is described as a future leading direction of MOF design.
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Affiliation(s)
- Vincent Guillerm
- King Abdullah University of Science and Technology (KAUST), Division of Physical Sciences and Engineering, Advanced Membranes & Porous Materials Center (AMPM), Functional Materials Design, Discovery & Development Research Group (FMD3), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Mohamed Eddaoudi
- King Abdullah University of Science and Technology (KAUST), Division of Physical Sciences and Engineering, Advanced Membranes & Porous Materials Center (AMPM), Functional Materials Design, Discovery & Development Research Group (FMD3), Thuwal 23955-6900, Kingdom of Saudi Arabia
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12
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Felsner B, Bon V, Evans JD, Schwotzer F, Grünker R, Senkovska I, Kaskel S. Unraveling the Guest-Induced Switchability in the Metal-Organic Framework DUT-13(Zn)*. Chemistry 2021; 27:9708-9715. [PMID: 33871114 PMCID: PMC8362161 DOI: 10.1002/chem.202100599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Indexed: 11/22/2022]
Abstract
The switching mechanism of the flexible framework Zn4 O(benztb)1.5 (benztb=N,N,N',N'-benzidine tetrabenzoate), also known as DUT-13, was studied by advanced powder X-ray diffraction (PXRD) and gas physisorption techniques. In situ synchrotron PXRD experiments upon physisorption of nitrogen (77 K) and n-butane (273 K) shed light on the hitherto unnoticed guest-induced breathing in the MOF. The mechanism of contraction is based on the conformationally labile benztb ligand and accompanied by a reduction in specific pore volume from 2.03 cm3 g-1 in the open-pore phase to 0.91 cm3 g-1 in the contracted-pore phase. The high temperature limit for adsorption-induced contraction of 170 K, determined by systematic temperature variation of methane adsorption isotherms, indicates that the DUT-13 framework is softer than other mesoporous MOFs like DUT-49 and does not support the formation of overloaded metastable states required for negative gas-adsorption transitions.
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Affiliation(s)
- Bodo Felsner
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstraße 6601069DresdenGermany
| | - Volodymyr Bon
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstraße 6601069DresdenGermany
| | - Jack D. Evans
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstraße 6601069DresdenGermany
| | - Friedrich Schwotzer
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstraße 6601069DresdenGermany
| | - Ronny Grünker
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstraße 6601069DresdenGermany
| | - Irena Senkovska
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstraße 6601069DresdenGermany
| | - Stefan Kaskel
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstraße 6601069DresdenGermany
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13
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Hiraide S, Arima H, Tanaka H, Miyahara MT. Slacking of Gate Adsorption Behavior on Metal-Organic Frameworks under an External Force. ACS APPLIED MATERIALS & INTERFACES 2021; 13:30213-30223. [PMID: 34143592 DOI: 10.1021/acsami.1c07370] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
As flexible metal-organic frameworks (MOFs) and their gate adsorption behaviors are increasingly expected to be used in gas storage and separation systems, evaluating their performance by considering their usage patterns in actual processes is becoming increasingly important. Herein, we show that the shaping of the elastic layer-structured MOF-11 (ELM-11; [Cu(BF4)2(4,4'-bipyridine)2]) into pellet forms using polymer binders smears its stepwise uptake associated with the CO2 gate adsorption. This is a critical problem because the superior adsorption properties of flexible MOFs are highly dependent on the sharpness of the step. Free energy analysis by molecular simulations revealed that the slacking of the gate adsorption is natural from a thermodynamic point of view. In other words, the external force exerted by the polymer binders, which prevents the expansion of MOF particles upon the gate opening, changes the free energy landscape of the system. This causes the flexible motifs within the MOF particles to undergo a structural transition at slightly different pressures from each other. The force profile dependence of the slacking phenomenon on both adsorption and desorption isotherms was also investigated. It was revealed that controlling the force profile applied to MOF particles is important to mold MOF pellets that satisfy the robustness and sharpness of the gate adsorption. Finally, we examined the coating of pellets to verify the relationship between the force profile and the degree of slacking and discussed possible strategies to improve the sharpness of the gate adsorption on MOF pellets considering the revealed mechanism.
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Affiliation(s)
- Shotaro Hiraide
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
| | - Homare Arima
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
| | - Hideki Tanaka
- Research Initiative for Supra-Materials (RISM), Shinshu University, 4-17-1 Wakasato, Nagano 380-8533, Japan
| | - Minoru T Miyahara
- Department of Chemical Engineering, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
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14
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Hirao S, Hamagami R, Ohhashi T, Eguchi K, Kubo N, Takashima Y, Akamatsu K, Tsuruoka T. Exploration of structural transition phenomenon in flexible metal–organic framework formed on polymer substrate. CrystEngComm 2021. [DOI: 10.1039/d1ce01383a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigate the structural transition of directly formed flexible MOF crystals on a polymer substrate.
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Affiliation(s)
- Shoya Hirao
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Ruho Hamagami
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Takashi Ohhashi
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Keiichi Eguchi
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Neo Kubo
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Yohei Takashima
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Kensuke Akamatsu
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Takaaki Tsuruoka
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
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