51
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Duong NT, Trébosc J, Lafon O, Amoureux JP. Improved sensitivity and quantification for 29Si NMR experiments on solids using UDEFT (Uniform Driven Equilibrium Fourier Transform). SOLID STATE NUCLEAR MAGNETIC RESONANCE 2019; 100:52-62. [PMID: 30959243 DOI: 10.1016/j.ssnmr.2019.03.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/21/2019] [Accepted: 03/21/2019] [Indexed: 06/09/2023]
Abstract
We demonstrate the possibility to use UDEFT (Uniform Driven Equilibrium Fourier Transform) technique in order to improve the sensitivity and the quantification of one-dimensional 29Si NMR experiments under magic-angle spinning (MAS). We derive an analytical expression of the signal-to-noise ratios of UDEFT and single-pulse (SP) experiments subsuming the contributions of transient and steady-state regimes. Using numerical spin dynamics simulations and experiments on 29Si-enriched amorphous silica and borosilicate glass, we show that 59180298059180 refocusing composite π-pulse and the adiabatic inversion using tanh/tan modulation improve the robustness of UDEFT technique to rf-inhomogeneity, offset, and chemical shift anisotropy. These pulses combined with a two-step phase cycle limit the pulse imperfections and the artifacts produced by stimulated echoes. The sensitivity of SP, UDEFT and CPMG (Carr-Purcell-Meiboom-Gill) techniques are experimentally compared on functionalized and non-functionalized mesoporous silica. Furthermore, experiments on a flame retardant material prove that UDEFT technique provides a better quantification of 29Si sites with higher sensitivity than SP method.
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Affiliation(s)
- Nghia Tuan Duong
- Univ. Lille, Centrale Lille, ENSCL, Univ. Artois, CNRS-8181, UCCS - Unit of Catalysis and Chemistry of Solids, F-59000 Lille, France
| | - Julien Trébosc
- Univ. Lille, Centrale Lille, ENSCL, Univ. Artois, CNRS-8181, UCCS - Unit of Catalysis and Chemistry of Solids, F-59000 Lille, France; Univ. Lille, CNRS-FR2638, Fédération Chevreul, F-59000 Lille, France.
| | - Olivier Lafon
- Univ. Lille, Centrale Lille, ENSCL, Univ. Artois, CNRS-8181, UCCS - Unit of Catalysis and Chemistry of Solids, F-59000 Lille, France; Institut Universitaire de France, 1 rue Descartes, F-75231 Paris, France
| | - Jean-Paul Amoureux
- Univ. Lille, Centrale Lille, ENSCL, Univ. Artois, CNRS-8181, UCCS - Unit of Catalysis and Chemistry of Solids, F-59000 Lille, France; Bruker Biospin, 34 rue de l'industrie, F-67166 Wissembourg, France.
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52
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Copéret C. Single-Sites and Nanoparticles at Tailored Interfaces Prepared via Surface Organometallic Chemistry from Thermolytic Molecular Precursors. Acc Chem Res 2019; 52:1697-1708. [PMID: 31150207 DOI: 10.1021/acs.accounts.9b00138] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Heterogeneous catalysts are complex by nature, making particularly difficult to assess the structure of their active sites. Such complexity is inherited in part from their mode of preparation, which typically involves coprecipitation or impregnation of metal salts in aqueous solution, and the associated complex surface chemistries. In this context, surface organometallic chemistry (SOMC) has emerged as a powerful approach to generate well-defined surface species, where the metal sites are introduced by grafting tailored molecular precursors. When combined with thermolytic molecular precursors (TMPs) that can lose their organic moieties quite readily upon thermal treatment, SOMC provides access to supported isolated metal sites with defined oxidation state and nuclearity inherited from the precursor. The resulting surface species bear unusual coordination imposed by the surface that provides them high reactivity in comparison with their molecular precursor. In addition, these molecularly defined species bare strong resemblance with the active sites of supported metal oxides. However, they typically contain a higher proportion of active sites making structure-activity relationship possible. They thus constitute ideal models for this important class of industrial catalysts that are used in numerous applications such as olefin epoxidation (Shell process), olefin metathesis (triolefin process), ethylene polymerization (Phillips catalysts), or propane dehydrogenation (Catofin and related processes). This SOMC/TMP approach can thus provide detailed information about the structure of active sites in industrial catalysts, their mode of initiation and deactivation, as well as the role of the support and specific thermal treatment on the final activity of the catalysts. Nonetheless, these structurally characterized surface sites still exhibit heterogeneous environments borrowed from the support itself, that explain the intrinsic complexity of heterogeneous catalysis. Furthermore, SOMC/TMP can also be used to generate and investigate supported metal nanoparticles. Starting from the well-defined isolated sites, that also contain adjacent surface OH groups, one can graft a second metal and then generate after treatment under hydrogen small and narrowly dispersed alloys or nanoparticles with tailored interfaces that can show improved catalytic performances and are amiable to detailed structure-activity relationships. This approach is illustrated by two case studies: (1) formation of supported copper nanoparticles at tailored interfaces that contain isolated metal sites for the selective hydrogenation of carbon dioxide to methanol, allowing for a detailed understanding of the role of dopants and supports in heterogeneous catalysis, and (2) preparation of highly selective and productive propane dehydrogenation catalysts based on silica-supported Pt xGa y alloy. Overall, this Account shows how the combination of SOMC and TMP helps to generate catalysts, particularly suited for elucidating structural characterization of active sites at a molecular-level which in turn enables structure-activity relationship to be drawn. Such detailed information obtained on well-defined catalysts can then be used to understand complex effects observed in industrial catalysts (effects of supports, additives, dopants, etc.), and to extract information that can then be used to improve them in a more rational way.
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Affiliation(s)
- Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg. 1-5, CH-8093 Zürich, Switzerland
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53
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Perras FA, Goh TW, Wang LL, Huang W, Pruski M. Enhanced 1H-X D-HMQC performance through improved 1H homonuclear decoupling. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2019; 98:12-18. [PMID: 30669006 DOI: 10.1016/j.ssnmr.2019.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 01/05/2019] [Accepted: 01/06/2019] [Indexed: 06/09/2023]
Abstract
The sensitivity of solid-state NMR experiments that utilize 1H zero-quantum heteronuclear dipolar recoupling, such as D-HMQC, is compromised by poor homonuclear decoupling. This leads to a rapid decay of recoupled magnetization and an inefficient recoupling of long-range dipolar interactions, especially for nuclides with low gyromagnetic ratios. We investigated the use, in symmetry-based 1H heteronuclear recoupling sequences, of a basic R element that was principally designed for efficient homonuclear decoupling. By shortening the time required to suppress the effects of homonuclear dipolar interactions to the duration of a single inversion pulse, spin diffusion was effectively quenched and long-lived recoupled coherence lifetimes could be obtained. We show, both theoretically and experimentally, that these modified sequences can yield considerable sensitivity improvements over the current state-of-the-art methods and applied them to the indirect detection of 89Y in a metal-organic framework.
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Affiliation(s)
| | - Tian Wei Goh
- US Department of Energy, Ames Laboratory, Ames, IA, 50011, USA; Department of Chemistry, Iowa State University, Ames, IA, 50011, USA
| | - Lin-Lin Wang
- US Department of Energy, Ames Laboratory, Ames, IA, 50011, USA
| | - Wenyu Huang
- US Department of Energy, Ames Laboratory, Ames, IA, 50011, USA; Department of Chemistry, Iowa State University, Ames, IA, 50011, USA
| | - Marek Pruski
- US Department of Energy, Ames Laboratory, Ames, IA, 50011, USA; Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.
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54
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Walder B, Berk C, Liao WC, Rossini AJ, Schwarzwälder M, Pradere U, Hall J, Lesage A, Copéret C, Emsley L. One- and Two-Dimensional High-Resolution NMR from Flat Surfaces. ACS CENTRAL SCIENCE 2019; 5:515-523. [PMID: 30937379 PMCID: PMC6439530 DOI: 10.1021/acscentsci.8b00916] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Indexed: 05/02/2023]
Abstract
Determining atomic-level characteristics of molecules on two-dimensional surfaces is one of the fundamental challenges in chemistry. High-resolution nuclear magnetic resonance (NMR) could deliver rich structural information, but its application to two-dimensional materials has been prevented by intrinsically low sensitivity. Here we obtain high-resolution one- and two-dimensional 31P NMR spectra from as little as 160 picomoles of oligonucleotide functionalities deposited onto silicate glass and sapphire wafers. This is enabled by a factor >105 improvement in sensitivity compared to typical NMR approaches from combining dynamic nuclear polarization methods, multiple-echo acquisition, and optimized sample formulation. We demonstrate that, with this ultrahigh NMR sensitivity, 31P NMR can be used to observe DNA bound to miRNA, to sense conformational changes due to ion binding, and to follow photochemical degradation reactions.
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Affiliation(s)
- Brennan
J. Walder
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Christian Berk
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH−8093 Zürich, Switzerland
| | - Wei-Chih Liao
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH−8093 Zürich, Switzerland
| | - Aaron J. Rossini
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011-3020, United States
| | - Martin Schwarzwälder
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH−8093 Zürich, Switzerland
| | - Ugo Pradere
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH−8093 Zürich, Switzerland
| | - Jonathan Hall
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH−8093 Zürich, Switzerland
| | - Anne Lesage
- Institut
de Sciences Analytiques, Centre de RMN à Très Hauts
Champs, Université de Lyon (CNRS/ENS
Lyon/UCB Lyon 1), 69100 Villeurbanne, France
| | - Christophe Copéret
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH−8093 Zürich, Switzerland
| | - Lyndon Emsley
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- E-mail:
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55
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Xiao D, Xu S, Brownbill NJ, Paul S, Chen LH, Pawsey S, Aussenac F, Su BL, Han X, Bao X, Liu Z, Blanc F. Fast detection and structural identification of carbocations on zeolites by dynamic nuclear polarization enhanced solid-state NMR. Chem Sci 2018; 9:8184-8193. [PMID: 30568769 PMCID: PMC6254210 DOI: 10.1039/c8sc03848a] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 10/02/2018] [Indexed: 12/20/2022] Open
Abstract
Acidic zeolites are porous aluminosilicates used in a wide range of industrial processes such as adsorption and catalysis. The formation of carbocation intermediates plays a key role in reactivity, selectivity and deactivation in heterogeneous catalytic processes. However, the observation and determination of carbocations remain a significant challenge in heterogeneous catalysis due to the lack of selective techniques of sufficient sensitivity to detect their low concentrations. Here, we combine 13C isotopic enrichment and efficient dynamic nuclear polarization magic angle spinning nuclear magnetic resonance spectroscopy to detect carbocations in zeolites. We use two dimensional 13C-13C through-bond correlations to establish their structures and 29Si-13C through-space experiments to quantitatively probe the interaction between multiple surface sites of the zeolites and the confined hydrocarbon pool species. We show that a range of various membered ring carbocations are intermediates in the methanol to hydrocarbons reaction catalysed by different microstructural β-zeolites and highlight that different reaction routes for the formation of both targeted hydrocarbon products and coke exist. These species have strong van der Waals interaction with the zeolite framework demonstrating that their accumulation in the channels of the zeolites leads to deactivation. These results enable understanding of deactivation pathways and open up opportunities for the design of catalysts with improved performances.
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Affiliation(s)
- Dong Xiao
- State Key Laboratory of Catalysis , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
- Department of Chemistry , University of Liverpool , Crown Street , Liverpool , L69 7ZD , UK .
| | - Shutao Xu
- National Engineering Laboratory for Methanol to Olefins , Dalian National Laboratory for Clean Energy , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Dalian 116023 , China
| | - Nick J Brownbill
- Department of Chemistry , University of Liverpool , Crown Street , Liverpool , L69 7ZD , UK .
| | - Subhradip Paul
- DNP MAS NMR Facility , Sir Peter Mansfield Imaging Centre , University of Nottingham , Nottingham NG7 2RD , UK
| | - Li-Hua Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , 122 Luoshi Road , 430070 , Wuhan , China
| | - Shane Pawsey
- Bruker BioSpin Corporation , 15 Fortune Drive , Billerica , Massachusetts 01821 , USA
| | - Fabien Aussenac
- Bruker BioSpin , 34 rue de I'Industrie BP 10002 , 67166 Wissembourg Cedex , France
| | - Bao-Lian Su
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , 122 Luoshi Road , 430070 , Wuhan , China
- CMI (Laboratory of Inorganic Materials Chemistry) , University of Namur , 61 rue de Bruxelles , B-5000 Namur , Belgium
| | - Xiuwen Han
- State Key Laboratory of Catalysis , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China
| | - Xinhe Bao
- State Key Laboratory of Catalysis , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China
| | - Zhongmin Liu
- State Key Laboratory of Catalysis , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China
- National Engineering Laboratory for Methanol to Olefins , Dalian National Laboratory for Clean Energy , Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Dalian 116023 , China
| | - Frédéric Blanc
- Department of Chemistry , University of Liverpool , Crown Street , Liverpool , L69 7ZD , UK .
- Stephenson Institute for Renewable Energy , University of Liverpool , Crown Street , Liverpool L69 7ZD , UK
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56
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Affiliation(s)
| | - Philippe Serp
- LCC CNRS-UPR 8241 ENSIACET Université de Toulouse Toulouse France
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57
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Perras FA, Pruski M. Large-scale ab initio simulations of MAS DNP enhancements using a Monte Carlo optimization strategy. J Chem Phys 2018; 149:154202. [PMID: 30342444 DOI: 10.1063/1.5042651] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Magic-angle-spinning (MAS) dynamic nuclear polarization (DNP) has recently emerged as a powerful technology enabling otherwise unrealistic solid-state NMR experiments. The simulation of DNP processes which might, for example, aid in refining the experimental conditions or the design of better performing polarizing agents, is, however, plagued with significant challenges, often limiting the system size to only 3 spins. Here, we present the first approach to fully ab initio large-scale simulations of MAS DNP enhancements. The Landau-Zener equation is used to treat all interactions concerning electron spins, and the low-order correlations in the Liouville space method is used to accurately treat the spin diffusion, as well as its MAS speed dependence. As the propagator cannot be stored, a Monte Carlo optimization method is used to determine the steady-state enhancement factors. This new software is employed to investigate the MAS speed dependence of the enhancement factors in large spin systems where spin diffusion is of importance, as well as to investigate the impacts of solvent and polarizing agent deuteration on the performance of MAS DNP.
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58
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Ni B, Shi Y, Wang X. The Sub-Nanometer Scale as a New Focus in Nanoscience. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1802031. [PMID: 30039573 DOI: 10.1002/adma.201802031] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Indexed: 06/08/2023]
Abstract
Size is one of the central issues in nanoscience. The practical meaning of the term "sub-nanometric material (SNM)" requires two aspects: (1) its size should be at the atomic level; (2) it shows unique (size-related) properties compared to its nano-counterparts with larger sizes. Here, SNMs in the form of wires (SNWs) and the unique properties arising from their special size are reviewed. First, their polymer-like behavior, including rheological behavior and self-assembly, is dicussed. Their origins may stem from the special size and the ligands around the wire. Even a slight increase in diameter would risk the polymer-like behavior. Meanwhile, the ligands on SNWs are proportional to the inorganic entity at this scale. Consequently, surface ligands should have a profound impact on the properties, like catalysis, self-assembly, optics, etc. To reveal more potential applications, their applications in energy conversion are comprehensively reviewed. To some extent, characterization can greatly influence the way things are observed. Thus, some appropriate characterization techniques are briefly introduced. Finally, another emerging part of SNWs (atomic chain material) is briefly introduced. It is hoped that this review can provide new insights to this special scale.
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Affiliation(s)
- Bing Ni
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Yuang Shi
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Xun Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
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59
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Piveteau L, Ong TC, Walder BJ, Dirin DN, Moscheni D, Schneider B, Bär J, Protesescu L, Masciocchi N, Guagliardi A, Emsley L, Copéret C, Kovalenko MV. Resolving the Core and the Surface of CdSe Quantum Dots and Nanoplatelets Using Dynamic Nuclear Polarization Enhanced PASS-PIETA NMR Spectroscopy. ACS CENTRAL SCIENCE 2018; 4:1113-1125. [PMID: 30276244 PMCID: PMC6161058 DOI: 10.1021/acscentsci.8b00196] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Indexed: 05/05/2023]
Abstract
Understanding the surface of semiconductor nanocrystals (NCs) prepared using colloidal methods is a long-standing goal of paramount importance for all their potential optoelectronic applications, which remains unsolved largely because of the lack of site-specific physical techniques. Here, we show that multidimensional 113Cd dynamic nuclear polarization (DNP) enhanced NMR spectroscopy allows the resolution of signals originating from different atomic and magnetic surroundings in the NC cores and at the surfaces. This enables the determination of the structural perfection, and differentiation between the surface and core atoms in all major forms of size- and shape-engineered CdSe NCs: irregularly faceted quantum dots (QDs) and atomically flat nanoplatelets, including both dominant polymorphs (zinc-blende and wurtzite) and their epitaxial nanoheterostructures (CdSe/CdS core/shell quantum dots and CdSe/CdS core/crown nanoplatelets), as well as magic-sized CdSe clusters. Assignments of the NMR signals to specific crystal facets of oleate-terminated ZB structured CdSe NCs are proposed. Significantly, we discover far greater atomistic complexity of the surface structure and the species distribution in wurtzite as compared to zinc-blende CdSe QDs, despite an apparently identical optical quality of both QD polymorphs.
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Affiliation(s)
- Laura Piveteau
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Dübendorf, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Ta-Chung Ong
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Brennan J. Walder
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Dmitry N. Dirin
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Dübendorf, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Daniele Moscheni
- Dipartimento
di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell’Insubria, via Valleggio 11, I-22100 Como, Italy
| | - Barbara Schneider
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Janine Bär
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Loredana Protesescu
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Dübendorf, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Norberto Masciocchi
- Dipartimento
di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell’Insubria, via Valleggio 11, I-22100 Como, Italy
| | - Antonietta Guagliardi
- Dipartimento
di Scienza e Alta Tecnologia and To.Sca.Lab, Università dell’Insubria, via Valleggio 11, I-22100 Como, Italy
- Istituto
di Crystallografia and To.Sca.Lab, Consiglio Nazionale delle Ricerche, via Valleggio 11, I-22100 Como, Italy
| | - Lyndon Emsley
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale
de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Christophe Copéret
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- E-mail:
| | - Maksym V. Kovalenko
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Dübendorf, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
- E-mail:
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60
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Paul G, Bisio C, Braschi I, Cossi M, Gatti G, Gianotti E, Marchese L. Combined solid-state NMR, FT-IR and computational studies on layered and porous materials. Chem Soc Rev 2018; 47:5684-5739. [PMID: 30014075 DOI: 10.1039/c7cs00358g] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Understanding the structure-property relationship of solids is of utmost relevance for efficient chemical processes and technological applications in industries. This contribution reviews the concept of coupling three well-known characterization techniques (solid-state NMR, FT-IR and computational methods) for the study of solid state materials which possess 2D and 3D architectures and discusses the way it will benefit the scientific communities. It highlights the most fundamental and applied aspects of the proactive combined approach strategies to gather information at a molecular level. The integrated approach involving multiple spectroscopic and computational methods allows achieving an in-depth understanding of the surface, interfacial and confined space processes that are beneficial for the establishment of structure-property relationships. The role of ssNMR/FT-IR spectroscopic properties of probe molecules in monitoring the strength and distribution of catalytic active sites and their accessibility at the porous/layered surface is discussed. Both experimental and theoretical aspects will be considered by reporting relevant examples. This review also identifies and discusses the progress, challenges and future prospects in the field of synthesis and applications of layered and porous solids.
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Affiliation(s)
- Geo Paul
- Department of Science and Technological Innovation, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
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61
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NMR chemical shift analysis decodes olefin oligo- and polymerization activity of d 0 group 4 metal complexes. Proc Natl Acad Sci U S A 2018; 115:E5867-E5876. [PMID: 29891699 DOI: 10.1073/pnas.1803382115] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
d0 metal-alkyl complexes (M = Ti, Zr, and Hf) show specific activity and selectivity in olefin polymerization and oligomerization depending on their ligand set and charge. Here, we show by a combined experimental and computational study that the 13C NMR chemical shift tensors of the α-carbon of metal alkyls that undergo olefin insertion signal the presence of partial alkylidene character in the metal-carbon bond, which facilitates this reaction. The alkylidene character is traced back to the π-donating interaction of a filled orbital on the alkyl group with an empty low-lying metal d-orbital of appropriate symmetry. This molecular orbital picture establishes a connection between olefin insertion into a metal-alkyl bond and olefin metathesis and a close link between the Cossee-Arlmann and Green-Rooney polymerization mechanisms. The 13C NMR chemical shifts, the α-H agostic interaction, and the low activation barrier of ethylene insertion are, therefore, the results of the same orbital interactions, thus establishing chemical shift tensors as a descriptor for olefin insertion.
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62
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Copéret C, Allouche F, Chan KW, Conley MP, Delley MF, Fedorov A, Moroz IB, Mougel V, Pucino M, Searles K, Yamamoto K, Zhizhko PA. Bridging the Gap between Industrial and Well‐Defined Supported Catalysts. Angew Chem Int Ed Engl 2018; 57:6398-6440. [DOI: 10.1002/anie.201702387] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Florian Allouche
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Ka Wing Chan
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Matthew P. Conley
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
- Current address: Department of ChemistryUniversity of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
| | - Murielle F. Delley
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Alexey Fedorov
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Ilia B. Moroz
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
- Current address: Laboratoire de Chimie des Processus Biologiques, UMR CNRS 8229, Collège de FranceUniversité Pierre et Marie Curie 11 Place Marcelin Berthelot 75005 Paris France
| | - Margherita Pucino
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Keith Searles
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Keishi Yamamoto
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Pavel A. Zhizhko
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
- A. N. Nesmeyanov Institute of Organoelement CompoundsRussian Academy of Sciences Vavilov street 28 119991 Moscow Russia
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63
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Kosinov N, Liu C, Hensen EJM, Pidko EA. Engineering of Transition Metal Catalysts Confined in Zeolites. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2018; 30:3177-3198. [PMID: 29861546 PMCID: PMC5973782 DOI: 10.1021/acs.chemmater.8b01311] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/26/2018] [Indexed: 05/09/2023]
Abstract
Transition metal-zeolite composites are versatile catalytic materials for a wide range of industrial and lab-scale processes. Significant advances in fabrication and characterization of well-defined metal centers confined in zeolite matrixes have greatly expanded the library of available materials and, accordingly, their catalytic utility. In this review, we summarize recent developments in the field from the perspective of materials chemistry, focusing on synthesis, postsynthesis modification, (operando) spectroscopy characterization, and computational modeling of transition metal-zeolite catalysts.
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Affiliation(s)
- Nikolay Kosinov
- Inorganic
Systems Engineering Group, Department of Chemical Engineering, Faculty
of Applied Sciences, Delft University of
Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- E-mail: (N.K.)
| | - Chong Liu
- Inorganic
Systems Engineering Group, Department of Chemical Engineering, Faculty
of Applied Sciences, Delft University of
Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Emiel J. M. Hensen
- Schuit
Institute of Catalysis, Laboratory of Inorganic Materials Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- E-mail: (E.J.M.H.)
| | - Evgeny A. Pidko
- Inorganic
Systems Engineering Group, Department of Chemical Engineering, Faculty
of Applied Sciences, Delft University of
Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- TheoMAT
group, ITMO University, Lomonosova str. 9, St. Petersburg 191002, Russia
- E-mail: (E.A.P.)
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64
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Cook AK, Copéret C. Alkyne Hydroamination Catalyzed by Silica-Supported Isolated Zn(II) Sites. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00202] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amanda K. Cook
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
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65
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Zhang J, Motta A, Gao Y, Stalzer MM, Delferro M, Liu B, Lohr TL, Marks TJ. Cationic Pyridylamido Adsorbate on Brønsted Acidic Sulfated Zirconia: A Molecular Supported Organohafnium Catalyst for Olefin Homo- and Co-Polymerization. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00611] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jialong Zhang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Alessandro Motta
- Dipartimento di Scienze Chimiche, Università di Roma “La Sapienza” and INSTM, UdR Roma, I-00185 Roma, Italy
| | - Yanshan Gao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Madelyn Marie Stalzer
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Massimiliano Delferro
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Boping Liu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Tracy L. Lohr
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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66
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Copéret C, Allouche F, Chan KW, Conley MP, Delley MF, Fedorov A, Moroz IB, Mougel V, Pucino M, Searles K, Yamamoto K, Zhizhko PA. Eine Brücke zwischen industriellen und wohldefinierten Trägerkatalysatoren. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201702387] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Christophe Copéret
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Florian Allouche
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Ka Wing Chan
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Matthew P. Conley
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
- Department of ChemistryUniversity of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
| | - Murielle F. Delley
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Alexey Fedorov
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Ilia B. Moroz
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Victor Mougel
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
- Laboratoire de Chimie des Processus Biologiques, UMR CNRS 8229, Collège de FranceUniversité Pierre et Marie Curie 11 Place Marcelin Berthelot 75005 Paris Frankreich
| | - Margherita Pucino
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Keith Searles
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Keishi Yamamoto
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Pavel A. Zhizhko
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
- A. N. Nesmeyanow-Institut für Elementorganische VerbindungenRussische Akademie der Wissenschaften Vavilov str. 28 119991 Moskau Russland
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67
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Lewis JD, Ha M, Luo H, Faucher A, Michaelis VK, Román-Leshkov Y. Distinguishing Active Site Identity in Sn-Beta Zeolites Using 31P MAS NMR of Adsorbed Trimethylphosphine Oxide. ACS Catal 2018. [DOI: 10.1021/acscatal.7b03533] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jennifer D. Lewis
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Michelle Ha
- Department of Chemistry, Gunning-Lemieux Chemistry Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Helen Luo
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Alexandra Faucher
- Department of Chemistry, Gunning-Lemieux Chemistry Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Vladimir K. Michaelis
- Department of Chemistry, Gunning-Lemieux Chemistry Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Yuriy Román-Leshkov
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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68
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Liao WC, Ghaffari B, Gordon CP, Xu J, Copéret C. Dynamic Nuclear Polarization Surface Enhanced NMR spectroscopy (DNP SENS): Principles, protocols, and practice. Curr Opin Colloid Interface Sci 2018. [DOI: 10.1016/j.cocis.2018.02.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Grekov D, Vancompernolle T, Taoufik M, Delevoye L, Gauvin RM. Solid-state NMR of quadrupolar nuclei for investigations into supported organometallic catalysts: scope and frontiers. Chem Soc Rev 2018; 47:2572-2590. [DOI: 10.1039/c7cs00682a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The scope, limitations and outlooks of half-integer quadrupolar nuclei NMR as applied to supported catalysts characterization are discussed.
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Affiliation(s)
- D. Grekov
- Univ. Lille
- CNRS
- Centrale Lille
- ENSCL
- Univ. Artois
| | | | - M. Taoufik
- Laboratoire de Chimie
- Catalyse
- Polyméres et Procédés
- UMR 5265 CNRS/ESCPE-Lyon/UCBL
- ESCPE Lyon
| | - L. Delevoye
- Univ. Lille
- CNRS
- Centrale Lille
- ENSCL
- Univ. Artois
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70
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Estes DP, Gordon CP, Fedorov A, Liao WC, Ehrhorn H, Bittner C, Zier ML, Bockfeld D, Chan KW, Eisenstein O, Raynaud C, Tamm M, Copéret C. Molecular and Silica-Supported Molybdenum Alkyne Metathesis Catalysts: Influence of Electronics and Dynamics on Activity Revealed by Kinetics, Solid-State NMR, and Chemical Shift Analysis. J Am Chem Soc 2017; 139:17597-17607. [DOI: 10.1021/jacs.7b09934] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Deven P. Estes
- Department
of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Christopher P. Gordon
- Department
of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Alexey Fedorov
- Department
of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Wei-Chih Liao
- Department
of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Henrike Ehrhorn
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Celine Bittner
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Manuel Luca Zier
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Dirk Bockfeld
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Ka Wing Chan
- Department
of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Odile Eisenstein
- Institut
Charles Gerhardt, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, Place E. Bataillon, F-34095 Montpellier, France
- Hylleraas
Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, 0315 Oslo, Norway
| | - Christophe Raynaud
- Institut
Charles Gerhardt, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, Place E. Bataillon, F-34095 Montpellier, France
| | - Matthias Tamm
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Christophe Copéret
- Department
of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
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71
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Smeets S, Berkson ZJ, Xie D, Zones SI, Wan W, Zou X, Hsieh MF, Chmelka BF, McCusker LB, Baerlocher C. Well-Defined Silanols in the Structure of the Calcined High-Silica Zeolite SSZ-70: New Understanding of a Successful Catalytic Material. J Am Chem Soc 2017; 139:16803-16812. [DOI: 10.1021/jacs.7b08810] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stef Smeets
- Laboratory
of Crystallography, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich CH 8093, Switzerland
- Berzelii
Center EXSELENT on Porous Materials, Department of Material and Environmental
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Zachariah J. Berkson
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Dan Xie
- Chevron
Energy Technology Company, Richmond, California 94802, United States
| | - Stacey I. Zones
- Chevron
Energy Technology Company, Richmond, California 94802, United States
| | - Wei Wan
- Berzelii
Center EXSELENT on Porous Materials, Department of Material and Environmental
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Xiaodong Zou
- Berzelii
Center EXSELENT on Porous Materials, Department of Material and Environmental
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Ming-Feng Hsieh
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Bradley F. Chmelka
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Lynne B. McCusker
- Laboratory
of Crystallography, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich CH 8093, Switzerland
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Christian Baerlocher
- Laboratory
of Crystallography, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich CH 8093, Switzerland
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
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72
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Copéret C, Fedorov A, Zhizhko PA. Surface Organometallic Chemistry: Paving the Way Beyond Well-Defined Supported Organometallics and Single-Site Catalysis. Catal Letters 2017. [DOI: 10.1007/s10562-017-2107-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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