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Dib E, Clatworthy E, Lakiss L, Ruaux V, Mintova S. Hydroxyl environments in zeolites probed by deuterium solid-state MAS NMR combined with IR spectroscopy. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00824f] [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
Deuterium (2D) solid-state MAS NMR spectroscopy is used for the first time for identifying both silanols and Brønsted acid sites in zeolites. The environments of hydroxyl groups in faujasite-type zeolites...
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2
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Buntkowsky G, Döller S, Haro-Mares N, Gutmann T, Hoffmann M. Solid-state NMR studies of non-ionic surfactants confined in mesoporous silica. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2021-3132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Abstract
This review gives an overview of current trends in the investigation of confined molecules such as higher alcohols, ethylene glycol and polyethylene glycol as guest molecules in neat and functionalized mesoporous silica materials. All these molecules have both hydrophobic and hydrophilic parts. They are characteristic role-models for the investigation of confined surfactants. Their properties are studied by a combination of solid-state NMR and relaxometry with other physicochemical techniques and molecular dynamics techniques. It is shown that this combination delivers unique insights into the structure, arrangement, dynamical properties and the guest-host interactions inside the confinement.
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Affiliation(s)
- Gerd Buntkowsky
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
| | - Sonja Döller
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
| | - Nadia Haro-Mares
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
| | - Torsten Gutmann
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
| | - Markus Hoffmann
- Department of Chemistry and Biochemistry , State University of New York College at Brockport , Brockport , NY , 14420 , USA
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3
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Medeiros-Costa IC, Dib E, Nesterenko N, Dath JP, Gilson JP, Mintova S. Silanol defect engineering and healing in zeolites: opportunities to fine-tune their properties and performances. Chem Soc Rev 2021; 50:11156-11179. [PMID: 34605833 DOI: 10.1039/d1cs00395j] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Zeolites have been game-changing materials in oil refining and petrochemistry over the last 60 years and have the potential to play the same role in the emerging processes of the energy and environmental transition. Although zeolites are crystalline inorganic solids, their structures are not perfect and the presence of defect sites - mainly Brønsted acid sites and silanols - influences their thermal and chemical resistance as well as their performances in key areas such as catalysis, gas and liquid separations and ion-exchange. In this paper, we review the type of defects in zeolites and the characterization techniques used for their identification and quantification with the focus on diffraction, spectroscopic and modeling approaches. More specifically, throughout the review, we will focus on silanol (Si-OH) defects located within the micropore structure and/or on the external surface of zeolites. The main approaches applied to engineer and heal defects and their consequences on the properties and applications of zeolites in catalysis and separation processes are highlighted. Finally, the challenges and opportunities of silanol defect engineering in tuning the properties of zeolites to meet the requirements for specific applications are presented.
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Affiliation(s)
- Izabel C Medeiros-Costa
- Laboratoire Catalyse et Spectrochimie (LCS), Normandie University, ENSICAEN, CNRS, 6 boulevard du Marechal Juin, 14050 Caen, France. .,Total Research and Technology Feluy, B-7181 Seneffe, Belgium
| | - Eddy Dib
- Laboratoire Catalyse et Spectrochimie (LCS), Normandie University, ENSICAEN, CNRS, 6 boulevard du Marechal Juin, 14050 Caen, France.
| | | | | | - Jean-Pierre Gilson
- Laboratoire Catalyse et Spectrochimie (LCS), Normandie University, ENSICAEN, CNRS, 6 boulevard du Marechal Juin, 14050 Caen, France.
| | - Svetlana Mintova
- Laboratoire Catalyse et Spectrochimie (LCS), Normandie University, ENSICAEN, CNRS, 6 boulevard du Marechal Juin, 14050 Caen, France.
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4
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Peng H, Vaughan J, Vogrin J. Effect of Alkalinity on Zeolite LTN Formation under Bayer Process Pre-desilication Conditions. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hong Peng
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - James Vaughan
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - John Vogrin
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
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5
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El Hariri El Nokab M, Sebakhy KO. Solid State NMR Spectroscopy a Valuable Technique for Structural Insights of Advanced Thin Film Materials: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1494. [PMID: 34200088 PMCID: PMC8228666 DOI: 10.3390/nano11061494] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 01/05/2023]
Abstract
Solid-state NMR has proven to be a versatile technique for studying the chemical structure, 3D structure and dynamics of all sorts of chemical compounds. In nanotechnology and particularly in thin films, the study of chemical modification, molecular packing, end chain motion, distance determination and solvent-matrix interactions is essential for controlling the final product properties and applications. Despite its atomic-level research capabilities and recent technical advancements, solid-state NMR is still lacking behind other spectroscopic techniques in the field of thin films due to the underestimation of NMR capabilities, availability, great variety of nuclei and pulse sequences, lack of sensitivity for quadrupole nuclei and time-consuming experiments. This article will comprehensively and critically review the work done by solid-state NMR on different types of thin films and the most advanced NMR strategies, which are beyond conventional, and the hardware design used to overcome the technical issues in thin-film research.
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Affiliation(s)
- Mustapha El Hariri El Nokab
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands;
| | - Khaled O. Sebakhy
- Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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6
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Buntkowsky G, Vogel M. Small Molecules, Non-Covalent Interactions, and Confinement. Molecules 2020; 25:E3311. [PMID: 32708283 PMCID: PMC7397022 DOI: 10.3390/molecules25143311] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/07/2020] [Accepted: 07/15/2020] [Indexed: 11/27/2022] Open
Abstract
This review gives an overview of current trends in the investigation of small guest molecules, confined in neat and functionalized mesoporous silica materials by a combination of solid-state NMR and relaxometry with other physico-chemical techniques. The reported guest molecules are water, small alcohols, and carbonic acids, small aromatic and heteroaromatic molecules, ionic liquids, and surfactants. They are taken as characteristic role-models, which are representatives for the typical classes of organic molecules. It is shown that this combination delivers unique insights into the structure, arrangement, dynamics, guest-host interactions, and the binding sites in these confined systems, and is probably the most powerful analytical technique to probe these systems.
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Affiliation(s)
- Gerd Buntkowsky
- Institut für Physikalische Chemie, Technische Universität Darmstadt, 64287 Darmstadt, Germany
| | - Michael Vogel
- Institut für Festkörperphysik, Technische Universität Darmstadt, 64295 Darmstadt, Germany
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7
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Peng H, Kim T, Vaughan J. Acid Leaching of Desilication Products: Implications for Acid Neutralization of Bauxite Residue. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00423] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hong Peng
- School of Chemical Engineering, The University of Queensland, Brisbane 4072, Australia
| | - Tae Kim
- School of Chemical Engineering, The University of Queensland, Brisbane 4072, Australia
| | - James Vaughan
- School of Chemical Engineering, The University of Queensland, Brisbane 4072, Australia
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8
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Dutta Chowdhury A, Yarulina I, Abou-Hamad E, Gurinov A, Gascon J. Surface enhanced dynamic nuclear polarization solid-state NMR spectroscopy sheds light on Brønsted-Lewis acid synergy during the zeolite catalyzed methanol-to-hydrocarbon process. Chem Sci 2019; 10:8946-8954. [PMID: 32190235 PMCID: PMC7068724 DOI: 10.1039/c9sc02215e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 08/20/2019] [Indexed: 02/02/2023] Open
Abstract
After a prolonged effort over two decades, the reaction mechanism of the zeolite-catalyzed methanol-to-hydrocarbon (MTH) process is now well-understood: the so-called 'direct mechanism' (via direct coupling of two methanol molecules) is responsible for the formation of the initial carbon-carbon bonds, while the hydrocarbon pool (HCP)-based dual cycle mechanism is responsible for the formation of reaction products. While most of the reaction events occur at zeolite Brønsted acid sites, the addition of Lewis acid sites (i.e., via the introduction of alkaline earth cations like calcium) has been shown to inhibit the formation of deactivating coke species and hence increase the catalyst lifetime. With the aim to have an in-depth mechanistic understanding, herein, we employ magic angle spinning surface-enhanced dynamic nuclear polarization solid-state NMR spectroscopy to illustrate that the inclusion of Lewis acidity prevents the formation of carbene/ylide species on the zeolite, directly affecting the equilibrium between arene and olefin cycles of the HCP mechanism and hence regulating the ultimate product selectivity and catalyst lifetime.
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Affiliation(s)
- Abhishek Dutta Chowdhury
- King Abdullah University of Science and Technology , KAUST Catalysis Center , Advanced Catalytic Materials , Thuwal 23955 , Saudi Arabia . ;
| | - Irina Yarulina
- King Abdullah University of Science and Technology , KAUST Catalysis Center , Advanced Catalytic Materials , Thuwal 23955 , Saudi Arabia . ;
| | - Edy Abou-Hamad
- King Abdullah University of Science and Technology , KAUST Core Labs , Thuwal 23955 , Saudi Arabia .
| | - Andrei Gurinov
- King Abdullah University of Science and Technology , KAUST Core Labs , Thuwal 23955 , Saudi Arabia .
| | - Jorge Gascon
- King Abdullah University of Science and Technology , KAUST Catalysis Center , Advanced Catalytic Materials , Thuwal 23955 , Saudi Arabia . ;
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9
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Kobayashi T, Pruski M. Spatial Distribution of Silica-Bound Catalytic Organic Functional Groups Can Now Be Revealed by Conventional and DNP-Enhanced Solid-State NMR Methods. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02017] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Takeshi Kobayashi
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Marek Pruski
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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10
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Sapiga AV, Sergeev NA. NMR study of microscopic mechanism of water molecules diffusion in natrolite. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2019; 97:1-6. [PMID: 30439542 DOI: 10.1016/j.ssnmr.2018.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 09/23/2018] [Accepted: 10/22/2018] [Indexed: 06/09/2023]
Abstract
The mineral natrolite is a good object for studying the features of the molecular mobility of water molecules in spatially restricted structures by NMR techniques. The microscopic mechanisms of water molecule mobility in channels of monocrystal natural zeolite natrolite (Na16Al16Si24O80·16H2O) have been investigated by broad-line (CW) NMR method. The CW NMR method, which accurately reproduces the shape of a Pake doublets of water molecules, has made it possible to trace diffusion of individual water molecules between specific positions in the crystal lattice as a function of temperature, which is important in understanding diffusion mechanisms in narrow channels of natrolite, where a diameter of the channel is smaller than the diameter of the water molecule. It has been shown that at temperatures higher than 250 K the regular diffusion of water molecules along the Schottky defects located along channels parallel to the c-crystal axis is a main kind of water molecules mobility. At temperature higher than 350 K the diffusion of water molecules in transversal channels of natrolite was observed also. Using the structural data the possible pathways of water molecules diffusion in natrolite channels have been discussed. The relationship between diffusion of water molecules and the dynamics of the zeolite framework and sodium cations is discussed on the basis of the assumption non-Markovian characte of diffusion in natrolite.
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Affiliation(s)
- A V Sapiga
- Physical-Technical Institute, V.I. Vernadsky Crimean Federal University, Simferopol, 295007, Russian Federation.
| | - N A Sergeev
- Department of Mathematics and Physics, Institute of Physics, University of Szczecin, Poland.
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11
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Kumari B, John D, Hoffmann P, Spende A, Toimil-Molares ME, Trautmann C, Hess C, Ruff P, Schulze M, Stark R, Buntkowsky G, Andrieu-Brunsen A, Gutmann T. Surface Enhanced DNP Assisted Solid-State NMR of Functionalized SiO2 Coated Polycarbonate Membranes. Z PHYS CHEM 2018. [DOI: 10.1515/zpch-2017-1032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Abstract
Surface enhanced solid-state NMR by dynamic nuclear polarization (DNP SENS) enables the characterization of the inner-pore surface functionalization of porous etched ion-track membranes exhibiting low specific surface areas compared to typical SBA- or MCM-type mesoporous silica materials. The membranes were conformally coated with a 5 nm thin SiO2 layer by atomic layer deposition. This layer was subsequently modified by aminopropyl silane linkers that allow further functionalization via the terminal amine group. The results evidence that in principle DNP SENS is a capable tool to analyze more complex porous systems, e.g. bioinspired functional etched ion-track membranes down to the molecular level. These results are relevant also for single nanopore systems, for which a direct analysis of the channel surface functionalization is not feasible by classical characterization methods. The applicability of DNP SENS to complex porous systems requires the optimization of the sample preparation and measurement parameters.
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Affiliation(s)
- Bharti Kumari
- Eduard-Zintl Institute for Inorganic and Physical Chemistry , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
| | - Daniel John
- Ernst-Berl Institute for Chemical Engineering and Macromolecular Science , Technische Universität Darmstadt , Alarich-Weiss-Str. 4 , D-64287 Darmstadt , Germany
| | - Paul Hoffmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1 , D-64291 Darmstadt , Germany
- Materialwissenschaft, Technische Universität Darmstadt , Alarich-Weiss-Str. 2 , D-64287 Darmstadt , Germany
| | - Anne Spende
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1 , D-64291 Darmstadt , Germany
- Materialwissenschaft, Technische Universität Darmstadt , Alarich-Weiss-Str. 2 , D-64287 Darmstadt , Germany
| | | | - Christina Trautmann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1 , D-64291 Darmstadt , Germany
- Materialwissenschaft, Technische Universität Darmstadt , Alarich-Weiss-Str. 2 , D-64287 Darmstadt , Germany
| | - Christian Hess
- Eduard-Zintl Institute for Inorganic and Physical Chemistry , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
| | - Philip Ruff
- Eduard-Zintl Institute for Inorganic and Physical Chemistry , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
| | - Marcus Schulze
- Physics of Surfaces, Institute of Materials Science and Center of Smart Interfaces , Technische Universität Darmstadt , Alarich-Weiss-Str. 16 , D-64287 Darmstadt , Germany
| | - Robert Stark
- Physics of Surfaces, Institute of Materials Science and Center of Smart Interfaces , Technische Universität Darmstadt , Alarich-Weiss-Str. 16 , D-64287 Darmstadt , Germany
| | - Gerd Buntkowsky
- Eduard-Zintl Institute for Inorganic and Physical Chemistry , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
| | - Annette Andrieu-Brunsen
- Ernst-Berl Institute for Chemical Engineering and Macromolecular Science , Technische Universität Darmstadt , Alarich-Weiss-Str. 4 , D-64287 Darmstadt , Germany
| | - Torsten Gutmann
- Eduard-Zintl Institute for Inorganic and Physical Chemistry , Technische Universität Darmstadt , Alarich-Weiss-Str. 8 , D-64287 Darmstadt , Germany
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12
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Rankin AM, Webb PB, Dawson DM, Viger-Gravel J, Walder BJ, Emsley L, Ashbrook SE. Determining the Surface Structure of Silicated Alumina Catalysts via Isotopic Enrichment and Dynamic Nuclear Polarization Surface-Enhanced NMR Spectroscopy. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2017; 121:22977-22984. [PMID: 29234484 PMCID: PMC5722451 DOI: 10.1021/acs.jpcc.7b08137] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 09/25/2017] [Indexed: 05/05/2023]
Abstract
Isotopic enrichment of 29Si and DNP-enhanced NMR spectroscopy are combined to determine the detailed surface structure of a silicated alumina catalyst. The significant sensitivity enhancement provided by DNP is vital to the acquisition of multinuclear and multidimensional experiments that provide information on the atomic-level structure of the species present at the surface. Isotopic enrichment not only facilitates spectral acquisition, particularly given the low (1.5 wt %) Si loading, but also enables spectra with higher resolution than those acquired using DNP to be obtained. The unexpected similarity of conventional, CP, and DNP NMR spectra is attributed to the presence of adventitious surface water that forms a sufficiently dense 1H network at the silica surface so as to mediate efficient polarization transfer to all Si species regardless of their chemical nature. Spectra reveal the presence of Si-O-Si linkages at the surface (identified as Q4(3Al)-Q4(3Al)) and confirm that the anchoring of the surface overlayer with the alumina occurs through AlIV and AlV species only. This suggests the presence of Q3/Q4 Si at the surface affects the neighboring Al species, modifying the surface structure and making it less likely AlVI environments are in close spatial proximity. In contrast, Q1/Q2 species, bonded to the surface by fewer covalent bonds, have less of an effect on the surface, and more AlVI species are consequently found nearby. The combination of isotropic enrichment and DNP provides a definitive and fully quantitative description of the Si-modified alumina surface, and we demonstrate that almost one-third of the silicon at the surface is connected to another Si species, even at the low level of coverage used, lowering the propensity for the formation of Brønsted acid sites. This suggests that a variation in the synthetic procedure might be required to obtain a more even coverage for optimum performance. The work here will allow for more rigorous future investigations of structure-function relationships in these complex materials.
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Affiliation(s)
- Andrew
G. M. Rankin
- School
of Chemistry, EaStCHEM and Centre of Magnetic Resonance, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
| | - Paul B. Webb
- School
of Chemistry, EaStCHEM and Centre of Magnetic Resonance, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
- Sasol
UK Ltd., Purdie Building,
North Haugh, St. Andrews KY16 9ST, United Kingdom
| | - Daniel M. Dawson
- School
of Chemistry, EaStCHEM and Centre of Magnetic Resonance, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
| | - Jasmine Viger-Gravel
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
| | - Brennan J. Walder
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
| | - Lyndon Emsley
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
| | - Sharon E. Ashbrook
- School
of Chemistry, EaStCHEM and Centre of Magnetic Resonance, University of St Andrews, St. Andrews KY16 9ST, United Kingdom
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13
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Kobayashi T, Perras FA, Slowing II, Sadow AD, Pruski M. Dynamic Nuclear Polarization Solid-State NMR in Heterogeneous Catalysis Research. ACS Catal 2015. [DOI: 10.1021/acscatal.5b02039] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Igor I. Slowing
- U.S.
DOE Ames
Laboratory, Ames, Iowa 50011-3020, United States
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011-3020, United States
| | - Aaron D. Sadow
- U.S.
DOE Ames
Laboratory, Ames, Iowa 50011-3020, United States
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011-3020, United States
| | - Marek Pruski
- U.S.
DOE Ames
Laboratory, Ames, Iowa 50011-3020, United States
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011-3020, United States
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14
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Polenova T, Gupta R, Goldbourt A. Magic angle spinning NMR spectroscopy: a versatile technique for structural and dynamic analysis of solid-phase systems. Anal Chem 2015; 87:5458-69. [PMID: 25794311 PMCID: PMC4890703 DOI: 10.1021/ac504288u] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Magic Angle Spinning (MAS) NMR spectroscopy is a powerful method for analysis of a broad range of systems, including inorganic materials, pharmaceuticals, and biomacromolecules. The recent developments in MAS NMR instrumentation and methodologies opened new vistas to atomic-level characterization of a plethora of chemical environments previously inaccessible to analysis, with unprecedented sensitivity and resolution.
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Affiliation(s)
- Tatyana Polenova
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Rupal Gupta
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Amir Goldbourt
- School of Chemistry, Tel Aviv University, Ramat Aviv 69978, Tel Aviv, Israel
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15
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Koller H, Chen CY, Zones SI. Selectivities in Post-Synthetic Modification of Borosilicate Zeolites. Top Catal 2015. [DOI: 10.1007/s11244-015-0382-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Lüdeker D, Brunklaus G. NMR crystallography of ezetimibe co-crystals. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2015; 65:29-40. [PMID: 25541425 DOI: 10.1016/j.ssnmr.2014.11.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 11/06/2014] [Accepted: 11/18/2014] [Indexed: 06/04/2023]
Abstract
An efficient, simplified protocol for solvent-drop assisted co-crystal preparation of ezetimibe (a drug for the treatment of primary hypercholesterolemia) with both imidazole and l-proline has been derived. The structures of the white powders were successfully solved via "NMR crystallography" combining solid-state NMR, powder X-ray diffraction and DFT chemical shift computations. Detailed insights into the likely crystallization mechanism were obtained from competition experiments, where efficient co-crystallization was feasible using ezetimibe monohydrate as precursor indicating that the crystal water acts as "molecular catalyst". It was also found that co-crystallization of imidazole is favored over l-proline, thus suggesting a clear preference of neutral hydrogen bonds compared to charge-assisted motifs.
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Affiliation(s)
- David Lüdeker
- Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstr. 28, D-48149 Münster, Germany
| | - Gunther Brunklaus
- Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstr. 28, D-48149 Münster, Germany.
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17
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Wiegand T, Lüdeker D, Brunklaus G, Bussmann K, Kehr G, Erker G, Eckert H. Polymorphism in P,P-[3]ferrocenophanes: insights from an NMR crystallographic approach. Dalton Trans 2014; 43:12639-47. [PMID: 25010526 DOI: 10.1039/c4dt01071j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Thomas Wiegand
- Institut für Physikalische Chemie and Graduate School of Chemistry, WWU Münster, Corrensstrasse 30, D 48149 Münster, Germany.
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18
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Li Y, Yu J. New stories of zeolite structures: their descriptions, determinations, predictions, and evaluations. Chem Rev 2014; 114:7268-316. [PMID: 24844459 DOI: 10.1021/cr500010r] [Citation(s) in RCA: 269] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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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19
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Progress in development and application of solid-state NMR for solid acid catalysis. CHINESE JOURNAL OF CATALYSIS 2013. [DOI: 10.1016/s1872-2067(12)60528-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Alonso B, Marichal C. Solid-state NMR studies of micelle-templated mesoporous solids. Chem Soc Rev 2013; 42:3808-20. [DOI: 10.1039/c2cs35368g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Inagaki S, Kawamura I, Sasaki Y, Yoshida K, Kubota Y, Naito A. Drastic sensitivity enhancement in 29Si MAS NMR of zeolites and mesoporous silica materials by paramagnetic doping of Cu2+. Phys Chem Chem Phys 2013; 15:13523-31. [DOI: 10.1039/c3cp51829a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Abstract
Nuclear Magnetic Resonance (NMR) spectroscopy is a well-established method for the investigation of various types of porous materials. During the past decade, metal–organic frameworks have attracted increasing research interest. Solid-state NMR spectroscopy has rapidly evolved into an important tool for the study of the structure, dynamics and flexibility of these materials, as well as for the characterization of host–guest interactions with adsorbed species such as xenon, carbon dioxide, water, and many others. The present review introduces and highlights recent developments in this rapidly growing field.
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