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Alahakoon S, Willans MJ, Huang Y. In Situ Multinuclear Magic-Angle Spinning NMR: Monitoring Crystallization of Molecular Sieve AlPO 4-11 in Real Time. JACS Au 2023; 3:1670-1683. [PMID: 37388699 PMCID: PMC10302754 DOI: 10.1021/jacsau.3c00109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 04/16/2023] [Accepted: 04/21/2023] [Indexed: 07/01/2023]
Abstract
Molecular sieves are crystalline three-dimensional frameworks with well-defined channels and cavities. They have been widely used in industry for many applications such as gas separation/purification, ion exchange, and catalysis. Obviously, understanding the formation mechanisms is fundamentally important. High-resolution solid-state NMR spectroscopy is a powerful method for the study of molecular sieves. However, due to technical challenges, the vast majority of the high-resolution solid-state NMR studies on molecular sieve crystallization are ex situ. In the present work, using a new commercially available NMR rotor that can withhold high pressure and high temperature, we examined the formation of molecular sieve AlPO4-11 under dry gel conversion conditions by in situ multinuclear (1H, 27Al, 31P, and 13C) magic-angle spinning (MAS) solid-state NMR. In situ high-resolution NMR spectra obtained as a function of heating time provide much insights underlying the crystallization mechanism of AlPO4-11. Specifically, in situ 27Al and 31P MAS NMR along with 1H → 31P cross-polarization (CP) MAS NMR were used to monitor the evolution of the local environments of framework Al and P, in situ 1H → 13C CP MAS NMR to follow the behavior of the organic structure directing agent, and in situ 1H MAS NMR to unveil the effect of water content on crystallization kinetics. The in situ MAS NMR results lead to a better understanding of the formation of AlPO4-11.
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Terrill NJ, Dent AJ, Dobson B, Beale AM, Allen L, Bras W. Past, present and future-sample environments for materials research studies in scattering and spectroscopy; a UK perspective. J Phys Condens Matter 2021; 33:483002. [PMID: 34479225 DOI: 10.1088/1361-648x/ac2389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Small angle x-ray scattering and x-ray absorption fine structure are two techniques that have been employed at synchrotron sources ever since their inception. Over the course of the development of the techniques, the introduction of sample environments for added value experiments has grown dramatically. This article reviews past successes, current developments and an exploration of future possibilities for these two x-ray techniques with an emphasis on the developments in the United Kingdom between 1980-2020.
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Affiliation(s)
| | - Andrew J Dent
- Diamond Light Source, Didcot, Oxfordshire, OX11 0DE, United Kingdom
| | - Barry Dobson
- Sagentia Ltd, Harston Mill, Harston Mill, CB22 7GG, United Kingdom
| | - Andrew M Beale
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
- The Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, OX11 0FA, United Kingdom
| | - Lisa Allen
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
- The Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, OX11 0FA, United Kingdom
| | - Wim Bras
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, One Bethel Valley Road TN 37831, United States of America
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Schwanke AJ, Vinaches P, Meneau F, Morgado E, Pergher S. Nucleation and crystallization of the MWW-type lamellar zeolitic precursor. Catal Today 2020; 344:102-7. [DOI: 10.1016/j.cattod.2018.10.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chaves Lima R, Bieseki L, Vinaches Melguizo P, Castellã Pergher SB. Zeolite Synthesis: General Aspects. Environmentally Friendly Zeolites 2019. [DOI: 10.1007/978-3-030-19970-8_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Simmance K, van Beek W, Sankar G. Time resolved in situ X-ray diffraction study of crystallisation processes of large pore nanoporous aluminophosphate materials. Faraday Discuss 2015; 177:237-47. [PMID: 25683746 DOI: 10.1039/c4fd00179f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Time resolved high-resolution X-ray powder diffraction was utilized to obtain detailed changes in the crystal structure parameters during the hydrothermal crystallization process of the nanoporous aluminophosphate AlPO-5 (AFI) structure. This in situ study offered not only the influence of metal ions on the onset of crystallization and estimation of the activation energy of the process, but also allowed us to determine in detail the changes in lattice parameters during this process. More importantly the time-resolved study clearly showed the lattice expansion in the divalent metal ions substituted system right from the on-set of crystallization process, compared to the one without any dopant ions, which suggest that an amorphous or poorly crystalline network is formed prior to crystallization that contains the large divalent ions (compared to Al(iii), the substituting element), which is in agreement with the combined XAS/XRD study reported earlier. A mechanism based on this and the earlier study is suggested.
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Affiliation(s)
- Kerry Simmance
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom.
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Affiliation(s)
- Yi Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Qianjin Street 2699, Changchun 130012, China
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Van de Voorde B, Munn AS, Guillou N, Millange F, De Vos DE, Walton RI. Adsorption of N/S heterocycles in the flexible metal-organic framework MIL-53(Fe(III)) studied by in situ energy dispersive X-ray diffraction. Phys Chem Chem Phys 2013; 15:8606-15. [PMID: 23439974 DOI: 10.1039/c3cp44349c] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The adsorption of N/S-containing heterocyclic organic molecules in the flexible iron(III) terephthalate MIL-53, Fe(III)(OH)(0.6)F(0.4)(O2C-C6H4-CO2)·(H2O), from the liquid phase was studied with in situ energy dispersive X-ray diffraction (EDXRD), in order to follow the adsorption-induced expansion of the structure. For comparison with the diffraction data, liquid phase adsorption isotherms were recorded for uptake of benzothiophene, benzothiazole and indole in isopropanol and in heptane. The solvent not only influences pore opening but is also a competing guest. The in situ EDXRD experiments allow the kinetics of guest uptake and the competition with solvent to be monitored directly. Indole uptake is limited; this adsorbate is barely capable of opening the closed, either hydrated or dehydrated, MIL-53(Fe) structure, or of penetrating the isopropanol-containing material in the concentration range under study. When isopropanol is used as a solvent, the guest molecules benzothiophene and benzothiazole must be present at a certain threshold concentration before substantial adsorption into the metal-organic framework takes place, eventually resulting in full opening of the structure. The fully expanded structures of benzothiophene or benzothiazole loaded MIL-53(Fe) materials have Imcm symmetry and a unit cell volume of ca. 1600 Å(3), and upon uptake of the guest molecules by the closed form (unit cell volume ~1000 Å(3)) no intermediate crystalline phases are seen. Successful uptake by MIL-53(Fe) requires that the adsorbate is primarily a good hydrogen bond acceptor; additionally, based on UV-visible spectroscopy, a charge-transfer interaction between the S atoms of benzothiophene and the aromatic rings in the MOF pore wall is proposed.
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Affiliation(s)
- Ben Van de Voorde
- Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Arenbergpark 23, B-3001 Leuven, Belgium
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Handke M, Kowalewska A. Siloxane and silsesquioxane molecules--precursors for silicate materials. Spectrochim Acta A Mol Biomol Spectrosc 2011; 79:749-757. [PMID: 21030292 DOI: 10.1016/j.saa.2010.08.049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Accepted: 08/26/2010] [Indexed: 05/30/2023]
Abstract
Preparation of ceramics by sol-gel method has been known for many years, but recently it has been developed as a method for the synthesis of nanostructural ceramic materials. Hydrolytic polycondensation of simple molecules [e.g. most widely used tetraethoxysilane (TEOS)] leads to xerogel materials that can contain macromolecules of distinct random, ladder and cage or partial cage structure. In order to obtain well-defined silsesquioxanes it is preferred to start the process with more complex molecules, bringing in a specific framework that can govern the structure of the product. In the presented work alkoxy derivatives of cyclosiloxanes and polysiloxanes as well as a hydride derivative of octahedral silsequioxane (T(8)(H)) were applied as precursors in the process of hydrolytic polycondensation. Depending on the reaction conditions, silsesquioxane macromolecules or silica material of ordered structure were obtained. We have prepared mesoporous organiosilica materials without using any template or surfactant whatsoever. The meso-pores are created due to the unique structure of initial oligosiloxane or silsequioxane molecules and the specific interactions in the used catalyst/solvent system. In the case of octasilsesquioxane precursor, the condensation process gives directly mesoporous silica material. Dried polysilsesquioxanes were heated at the temperature of 600°C in argon or air atmosphere (pyrolysis or ceramization). In the atmosphere of argon SiC(x)O(y) glass materials were obtained.
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Affiliation(s)
- M Handke
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Mickiewicza Av. 30, 30-059 Kraków, Poland.
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Walton RI, Munn AS, Guillou N, Millange F. Uptake of Liquid Alcohols by the Flexible FeIII Metal-Organic Framework MIL-53 Observed by Time-Resolved In Situ X-ray Diffraction. Chemistry 2011; 17:7069-79. [DOI: 10.1002/chem.201003634] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Indexed: 11/05/2022]
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Depla A, Verheyen E, Veyfeyken A, Gobechiya E, Hartmann T, Schaefer R, Martens JA, Kirschhock CEA. Zeolites X and A crystallization compared by simultaneous UV/VIS-Raman and X-ray diffraction. Phys Chem Chem Phys 2011; 13:13730-7. [DOI: 10.1039/c1cp20157c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Millange F, El Osta R, Medina ME, Walton RI. A time-resolved diffraction study of a window of stability in the synthesis of a copper carboxylate metal–organic framework. CrystEngComm 2011. [DOI: 10.1039/c0ce00530d] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Affiliation(s)
- Denise Zacher
- Anorganische Chemie II – Organometallics and Materials Chemistry, Ruhr‐Universität Bochum, 44870 Bochum (Deutschland), Fax: (49) 234‐32‐14174
| | - Rochus Schmid
- Anorganische Chemie II – Organometallics and Materials Chemistry, Ruhr‐Universität Bochum, 44870 Bochum (Deutschland), Fax: (49) 234‐32‐14174
| | - Christof Wöll
- Institut für Funktionelle Grenzflächen (IFG), Karlsruher Institut für Technologie (KIT), 76021 Karlsruhe (Deutschland)
| | - Roland A. Fischer
- Anorganische Chemie II – Organometallics and Materials Chemistry, Ruhr‐Universität Bochum, 44870 Bochum (Deutschland), Fax: (49) 234‐32‐14174
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Affiliation(s)
- Denise Zacher
- Inorganic Chemistry II—Organometallics and Materials Chemistry, Ruhr‐University Bochum, 44870 Bochum (Germany), Fax: (+49) 234‐32‐14174
| | - Rochus Schmid
- Inorganic Chemistry II—Organometallics and Materials Chemistry, Ruhr‐University Bochum, 44870 Bochum (Germany), Fax: (+49) 234‐32‐14174
| | - Christof Wöll
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), 76021 Karlsruhe (Germany)
| | - Roland A. Fischer
- Inorganic Chemistry II—Organometallics and Materials Chemistry, Ruhr‐University Bochum, 44870 Bochum (Germany), Fax: (+49) 234‐32‐14174
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Agostini G, Lamberti C, Palin L, Milanesio M, Danilina N, Xu B, Janousch M, van Bokhoven JA. In situ XAS and XRPD parametric rietveld refinement to understand dealumination of Y zeolite catalyst. J Am Chem Soc 2010; 132:667-78. [PMID: 20000838 DOI: 10.1021/ja907696h] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dealumination of NH(4)-Y zeolite during steaming to 873 K was investigated with in situ, time-dependent, synchrotron radiation XRPD and in situ Al K-edge XAS. Water desorption is complete at 450 K, and ammonium decomposition occurs between 500 and 550 K. Only a small fraction of Al(3+) species (5%) leaves the framework during heating from 710 to 873 K; these species occupy site I' inside the sodalite cage. This fraction increases up to 8% in the first 50 min at 873 K and remains constant for the following 70 min isotherm and during the high-temperature part of the cooling experiment. During cooling from 500 to 450 K, the electron density at site I' increases suddenly, corresponding to a fraction of 30-35% of the total Al, confirmed by ex situ (27)Al MAS solid-state NMR. At that temperature, in situ Al K-edge XAS indicates a change in Al coordination of a large fraction of Al, and thermogravimetric (TG) data show the first water molecules start to repopulate the pores. Such molecules drive the dislodgment of most of the Al from the zeolitic framework. Our data indicate that considerable structural collapse caused by steaming does not occur at the highest temperature; however, defects form, which lead to significant migration of framework Al(3+) to extraframework positions, which occurs only as water is able to enter the pores again, that is, at much lower temperature. Contrary to general opinion, these results demonstrate that zeolite dealumination is not primarily a high-temperature process. The standard Rietveld refinement approach failed to identify extraframework Al species. These new results were obtained by adopting the innovative parametric refinement [J. Appl. Crystallogr. 2007, 40, 87]. Treating all of the XRPD patterns collected during the evolution of temperature as one unique data set significantly reduces the overall number of optimized variables and, thus, their relative correlation, and finally results in a more reliable estimate of the optimized parameters. Our results contribute to a better understanding of the phenomena involved on the atomic scale in the preparation of ultrastable Y zeolites (USY). USY are employed in fluid catalytic cracking (FCC), which is the most important conversion process in petroleum refineries to convert the high-boiling hydrocarbon fractions of petroleum crude oils to more valuable products like gasoline and olefinic gases.
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Affiliation(s)
- Giovanni Agostini
- Department of Inorganic, Materials and Physical Chemistry, Torino University, Via P. Giuria 7,10125 Turin, Italy
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Millange F, Medina M, Guillou N, Férey G, Golden K, Walton R. Time-Resolved In Situ Diffraction Study of the Solvothermal Crystallization of Some Prototypical Metal-Organic Frameworks. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200905627] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Millange F, Medina M, Guillou N, Férey G, Golden K, Walton R. Time-Resolved In Situ Diffraction Study of the Solvothermal Crystallization of Some Prototypical Metal-Organic Frameworks. Angew Chem Int Ed Engl 2009; 49:763-6. [DOI: 10.1002/anie.200905627] [Citation(s) in RCA: 178] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Jacques SD, Leynaud O, Strusevich D, Stukas P, Barnes P, Sankar G, Sheehy M, O’Brien MG, Iglesias-Juez A, Beale AM. Recent progress in the use of in situ X-ray methods for the study of heterogeneous catalysts in packed-bed capillary reactors. Catal Today 2009. [DOI: 10.1016/j.cattod.2009.02.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Bentrup U, Radnik J, Armbruster U, Martin A, Leiterer J, Emmerling F, Brückner A. Linking Simultaneous In Situ WAXS/SAXS/Raman with Raman/ATR/UV–vis Spectroscopy: Comprehensive Insight into the Synthesis of Molybdate Catalyst Precursors. Top Catal 2009. [DOI: 10.1007/s11244-009-9309-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fisher RD, Walton RI. Time and position resolved in situ X-ray diffraction study of the hydrothermal conversion of gypsum monoliths to hydroxyapatite. Dalton Trans 2009:8079-86. [DOI: 10.1039/b910485m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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