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Kundu K, Musso JV, Benedikter MJ, Frey W, Gugeler K, Kästner J, Buchmeiser MR. Neutral and Cationic Molybdenum Imido Alkylidene Cyclic Alkyl Amino Carbene (CAAC) Complexes for Olefin Metathesis. Chemistry 2023; 29:e202301818. [PMID: 37366606 DOI: 10.1002/chem.202301818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/27/2023] [Accepted: 06/27/2023] [Indexed: 06/28/2023]
Abstract
The first neutral and cationic Mo imido alkylidene cyclic alkyl amino carbene (CAAC) complexes of the general formulae [Mo(N-Ar)(CHCMe2 Ph)(X)2 (CAAC)] and [Mo(N-Ar)(CHCMe2 Ph)(X)(CAAC)][B(ArF )4 ] (X=Br, Cl, OTf, OC6 F5 ; CAAC=1-(2,6-iPr2 -C6 H3 )-3,3,5,5-tetramethyltetrahydropyrrol-2-ylidene) have been synthesized from molybdenum imido bishalide alkylidene DME precursors. Different combinations of the imido and "X" ligands have been employed to understand synthetic peculiarities. Selected complexes have been characterized by single-crystal X-ray analysis. Due to the pronounced σ-donor/π-acceptor characteristics of CAACs, the corresponding neutral and cationic molybdenum imido alkylidene CAAC complexes do not require the presence of stabilizing donor ligands such as nitriles. Calculations on the PBE0-D3BJ/def2-TZVP level for PBE0-D3BJ/def2-SVP optimized geometries revealed partial charges at molybdenum similar to the corresponding molybdenum imido alkylidene N-heterocyclic carbene (NHC) complexes with a slightly higher polarization of the molybdenum alkylidene bond in the CAAC complexes. All cationic complexes have been tested in olefin metathesis reactions and showed improved activity compared to the analogous NHC complexes for hydrocarbon-based substrates, allowing for turnover numbers (TONs) up to 9500 even at room temperature. Some Mo imido alkylidene CAAC complexes are tolerant towards functional groups like thioethers and sulfonamides.
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Affiliation(s)
- Koushani Kundu
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Janis V Musso
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Mathis J Benedikter
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Wolfgang Frey
- Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Katrin Gugeler
- Institute of Theoretical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Johannes Kästner
- Institute of Theoretical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Michael R Buchmeiser
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
- German Institutes of Textile and Fiber Research (DITF), Körschtalstr. 26, 73770, Denkendorf, Germany
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2
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Synergistic interplay of dual active sites on spinel ZnAl2O4 for syngas conversion. Chem 2023. [DOI: 10.1016/j.chempr.2023.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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3
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Zhizhko PA, Bushkov NS, Pichugov AV, Zarubin DN. Oxo/imido heterometathesis: From molecular stoichiometric studies to well-defined heterogeneous catalysts. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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4
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Dorn RW, Cendejas MC, Chen K, Hung I, Altvater NR, McDermott WP, Gan Z, Hermans I, Rossini AJ. Structure Determination of Boron-Based Oxidative Dehydrogenation Heterogeneous Catalysts with Ultra-High Field 35.2 T 11B Solid-State NMR Spectroscopy. ACS Catal 2020; 10:13852-13866. [PMID: 34413990 DOI: 10.1021/acscatal.0c03762] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Boron-based heterogenous catalysts, such as hexagonal boron nitride (h-BN) as well as supported boron oxides, are highly selective catalysts for the oxidative dehydrogenation (ODH) of light alkanes to olefins. Previous catalytic measurements and molecular characterization of boron-based catalysts by 11B solid-state NMR spectroscopy and other techniques suggests that oxidized/hydrolyzed boron clusters are the catalytically active sites for ODH. However, 11B solid-state NMR spectroscopy often suffers from limited resolution because boron-11 is an I = 3/2 half-integer quadrupolar nucleus. Here, ultra-high magnetic field (B 0 = 35.2 T) is used to enhance the resolution of 11B solid-state NMR spectra and unambiguously determine the local structure and connectivity of boron species in h-BN nanotubes used as a ODH catalyst (spent h-BNNT), boron substituted MCM-22 zeolite [B-MWW] and silica supported boron oxide [B/SiO2] before and after use as an ODH catalyst. One-dimensional direct excitation 11B NMR spectra recorded at B 0 = 35.2 T are near isotropic in nature, allowing for the easy identification of all boron species. Two-dimensional 1H-11B heteronuclear correlation NMR spectra aid in the identification of boron species with B-OH functionality. Most importantly, 2D 11B dipolar double-quantum single-quantum homonuclear correlation NMR experiments were used to unambiguously probe boron-boron connectivity within all heterogeneous catalysts. These experiments are practically infeasible at lower, more conventional magnetic fields due to a lack of resolution and reduced NMR sensitivity. The detailed molecular structures determined for the amorphous oxidized/hydrolyzed boron layers on these heterogenous catalysts will aid in the future development of next generation ODH catalysts.
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Affiliation(s)
- Rick W. Dorn
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory, US Department of Energy, Ames, Iowa 50011, United States
| | - Melissa C. Cendejas
- Department of Chemistry, University of Wisconsin − Madison, Madison, Wisconsin 53706, United States
| | - Kuizhi Chen
- National High Magnetic Field Laboratory (NHMFL), Tallahassee, Florida 32310, United States
| | - Ivan Hung
- National High Magnetic Field Laboratory (NHMFL), Tallahassee, Florida 32310, United States
| | - Natalie R. Altvater
- Department of Chemical and Biological Engineering, University of Wisconsin − Madison, Madison, Wisconsin 53706, United States
| | - William P. McDermott
- Department of Chemistry, University of Wisconsin − Madison, Madison, Wisconsin 53706, United States
| | - Zhehong Gan
- National High Magnetic Field Laboratory (NHMFL), Tallahassee, Florida 32310, United States
| | - Ive Hermans
- Department of Chemistry, University of Wisconsin − Madison, Madison, Wisconsin 53706, United States
- Department of Chemical and Biological Engineering, University of Wisconsin − Madison, Madison, Wisconsin 53706, United States
| | - Aaron J. Rossini
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory, US Department of Energy, Ames, Iowa 50011, United States
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5
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Nagashima H, Trébosc J, Kon Y, Sato K, Lafon O, Amoureux JP. Observation of Low-γ Quadrupolar Nuclei by Surface-Enhanced NMR Spectroscopy. J Am Chem Soc 2020; 142:10659-10672. [DOI: 10.1021/jacs.9b13838] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Hiroki Nagashima
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Julien Trébosc
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181, UCCS - Unité de Catalyse et de Chimie du Solide, F-59000 Lille, France
- Univ. Lille, CNRS-2638, Fédération Chevreul, F-59000 Lille, France
| | - Yoshihiro Kon
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Olivier Lafon
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181, UCCS - Unité de Catalyse et de Chimie du Solide, F-59000 Lille, France
- Institut Universitaire de France, 1 rue Descartes, F-75231 Paris, France
| | - Jean-Paul Amoureux
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181, UCCS - Unité de Catalyse et de Chimie du Solide, F-59000 Lille, France
- Bruker Biospin, 34 rue de l’industrie, F-67166 Wissembourg, France
- Riken NMR Science and Development Division, Yokohama, 230-0045 Kanagawa, Japan
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6
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Culver DB, Huynh W, Tafazolian H, Conley MP. Solid-State 45Sc NMR Studies of Cp* 2Sc–OR (R = CMe 2CF 3, CMe(CF 3) 2, C(CF 3) 3, SiPh 3) and Relationship to the Structure of Cp* 2Sc-Sites Supported on Partially Dehydroxylated Silica. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00840] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Damien B. Culver
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Winn Huynh
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Hosein Tafazolian
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Matthew P. Conley
- Department of Chemistry, University of California, Riverside, California 92521, United States
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7
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Love AM, Cendejas MC, Hanrahan MP, Carnahan SL, Uchupalanun P, Rossini AJ, Hermans I. Understanding the Synthesis of Supported Vanadium Oxide Catalysts Using Chemical Grafting. Chemistry 2020; 26:1052-1063. [PMID: 31703149 DOI: 10.1002/chem.201904260] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Indexed: 11/12/2022]
Abstract
The complexity of variables during incipient wetness impregnation synthesis of supported metal oxides precludes an in-depth understanding of the chemical reactions governing the formation of the dispersed oxide sites. This contribution describes the use of vapor phase deposition chemistry (also known as grafting) as a tool to systematically investigate the influence of isopropanol solvent on VO(Oi Pr)3 anchoring during synthesis of vanadium oxide on silica. The availability of anchoring sites on silica was found to depend not only on the pretreatment of the silica but also on the solvent present. H-bond donors can reduce the reactivity of isolated silanols whereas disruption of silanol nests by H-bond acceptors can turn unreactive H-bonded silanols into reactive anchoring sites. The model suggested here can inform improved syntheses with increased dispersion of metal oxides on silica.
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Affiliation(s)
- Alyssa M Love
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Melissa C Cendejas
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Michael P Hanrahan
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, IA, 50011, USA
| | - Scott L Carnahan
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, IA, 50011, USA
| | - Pajean Uchupalanun
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Aaron J Rossini
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI, 53706, USA
| | - Ive Hermans
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA.,Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI, 53706, USA
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8
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Samantaray MK, D'Elia V, Pump E, Falivene L, Harb M, Ould Chikh S, Cavallo L, Basset JM. The Comparison between Single Atom Catalysis and Surface Organometallic Catalysis. Chem Rev 2019; 120:734-813. [PMID: 31613601 DOI: 10.1021/acs.chemrev.9b00238] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Single atom catalysis (SAC) is a recent discipline of heterogeneous catalysis for which a single atom on a surface is able to carry out various catalytic reactions. A kind of revolution in heterogeneous catalysis by metals for which it was assumed that specific sites or defects of a nanoparticle were necessary to activate substrates in catalytic reactions. In another extreme of the spectrum, surface organometallic chemistry (SOMC), and, by extension, surface organometallic catalysis (SOMCat), have demonstrated that single atoms on a surface, but this time with specific ligands, could lead to a more predictive approach in heterogeneous catalysis. The predictive character of SOMCat was just the result of intuitive mechanisms derived from the elementary steps of molecular chemistry. This review article will compare the aspects of single atom catalysis and surface organometallic catalysis by considering several specific catalytic reactions, some of which exist for both fields, whereas others might see mutual overlap in the future. After a definition of both domains, a detailed approach of the methods, mostly modeling and spectroscopy, will be followed by a detailed analysis of catalytic reactions: hydrogenation, dehydrogenation, hydrogenolysis, oxidative dehydrogenation, alkane and cycloalkane metathesis, methane activation, metathetic oxidation, CO2 activation to cyclic carbonates, imine metathesis, and selective catalytic reduction (SCR) reactions. A prospective resulting from present knowledge is showing the emergence of a new discipline from the overlap between the two areas.
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Affiliation(s)
- Manoja K Samantaray
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Valerio D'Elia
- School of Molecular Science and Engineering (MSE) , Vidyasirimedhi Institute of Science and Technology (VISTEC) , Wang Chan, Payupnai , 21210 Rayong , Thailand
| | - Eva Pump
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Laura Falivene
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Moussab Harb
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Samy Ould Chikh
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Luigi Cavallo
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Jean-Marie Basset
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
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9
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Pigliapochi R, O’Brien L, Pell AJ, Gaultois MW, Janssen Y, Khalifah PG, Grey CP. When Do Anisotropic Magnetic Susceptibilities Lead to Large NMR Shifts? Exploring Particle Shape Effects in the Battery Electrode Material LiFePO4. J Am Chem Soc 2019; 141:13089-13100. [DOI: 10.1021/jacs.9b04674] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Liam O’Brien
- Department of Physics, University of Liverpool, L69 7ZE Liverpool, U.K
| | - Andrew J. Pell
- Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K
| | | | - Yuri Janssen
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Peter G. Khalifah
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Clare P. Grey
- Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K
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10
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Brownbill NJ, Lee D, De Paëpe G, Blanc F. Detection of the Surface of Crystalline Y 2O 3 Using Direct 89Y Dynamic Nuclear Polarization. J Phys Chem Lett 2019; 10:3501-3508. [PMID: 31150249 PMCID: PMC6589743 DOI: 10.1021/acs.jpclett.9b01185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 05/31/2019] [Indexed: 05/29/2023]
Abstract
Nuclei with low gyromagnetic ratio (γ) present a serious sensitivity challenge for nulear magnetic resonance (NMR) spectroscopy. Recently, dynamic nuclear polarization (DNP) has shown great promise in overcoming this hurdle by indirect hyperpolarization (via 1H) of these low-γ nuclei. Here we show that at a magnetic field of 9.4 T and cryogenic temperature of about 110 K direct DNP of 89Y in a frozen solution of Y(NO3)3 can offer signal enhancements greater than 80 times using exogeneous trityl OX063 monoradical by satisfying the cross effect magic angle spinning (MAS) DNP mechanism. The large signal enhancement achieved permits 89Y NMR spectra of Y2O3 and Gd2O3-added Y2O3 materials to be obtained quickly (∼30 min), revealing a range of surface yttrium hydroxyl groups in addition to the two octahedral yttrium signals of the core. The results open up promises for the observation of low gyromagnetic ratio nuclei and the detection of corresponding surface and (sub-)surface sites.
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Affiliation(s)
- Nick J. Brownbill
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United
Kingdom
| | - Daniel Lee
- Univ.
Grenoble Alpes, CEA, IRIG, MEM, F-38000 Grenoble, France
| | - Gaël De Paëpe
- Univ.
Grenoble Alpes, CEA, IRIG, MEM, F-38000 Grenoble, France
| | - Frédéric Blanc
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United
Kingdom
- Stephenson
Institute for Renewable Energy, University
of Liverpool, Crown Street, Liverpool L69 7ZF, United Kingdom
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11
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Kobayashi T, Singappuli-Arachchige D, Slowing II, Pruski M. Spatial distribution of organic functional groups supported on mesoporous silica nanoparticles (2): a study by 1H triple-quantum fast-MAS solid-state NMR. Phys Chem Chem Phys 2018; 20:22203-22209. [PMID: 30117516 DOI: 10.1039/c8cp04425b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The distribution of organic functional groups attached to the surface of mesoporous silica nanoparticles (MSNs) via co-condensation was scrutinized using 1D and 2D 1H solid-state NMR, including the triple-quantum/single-quantum (TQ/SQ) homonuclear correlation technique. The excellent sensitivity of 1H NMR and high resolution provided by fast magic angle spinning (MAS) allowed us to study surfaces with very low concentrations of aminopropyl functional groups. The sequential process, in which the injection of tetraethyl orthosilicate (TEOS) into the aqueous mother liquor was followed by dropwise addition of the organosilane precursor, resulted in deployment of organic groups on the surface, which were highly clustered even in a sample with a very low loading of ∼0.1 mmol g-1. The underlying mechanism responsible for clustering could involve fast aggregation of the aminopropyltrimethoxysilane (APTMS) precursor within the liquid phase, and/or co-condensation of the silica-bound molecules. Understanding the deposition process and the resulting topology of surface functionalities with atomic-scale resolution, can help to develop novel approaches to the synthesis of complex inorganic-organic hybrid materials.
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Affiliation(s)
- Takeshi Kobayashi
- U.S. DOE Ames Laboratory, Iowa State University, 230 Spedding Hall, Ames, Iowa 50011, USA.
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12
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Pump E, Bendjeriou-Sedjerari A, Viger-Gravel J, Gajan D, Scotto B, Samantaray MK, Abou-Hamad E, Gurinov A, Almaksoud W, Cao Z, Lesage A, Cavallo L, Emsley L, Basset JM. Predicting the DNP-SENS efficiency in reactive heterogeneous catalysts from hydrophilicity. Chem Sci 2018; 9:4866-4872. [PMID: 29910939 PMCID: PMC5982197 DOI: 10.1039/c8sc00532j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/16/2018] [Indexed: 12/17/2022] Open
Abstract
Identification of surfaces at the molecular level has benefited from progress in dynamic nuclear polarization surface enhanced NMR spectroscopy (DNP SENS).
Identification of surfaces at the molecular level has benefited from progress in dynamic nuclear polarization surface enhanced NMR spectroscopy (DNP SENS). However, the technique is limited when using highly sensitive heterogeneous catalysts due to secondary reaction of surface organometallic fragments (SOMFs) with stable radical polarization agents. Here, we observe that in non-porous silica nanoparticles (NPs) (dparticle = 15 nm) some DNP enhanced NMR or SENS characterizations are possible, depending on the metal-loading of the SOMF and the type of SOMF substituents (methyl, isobutyl, neopentyl). This unexpected observation suggests that aggregation of the nanoparticles occurs in non-polar solvents (such as ortho-dichlorobenzene) leading to (partial) protection of the SOMF inside the interparticle space, thereby preventing reaction with bulky polarization agents. We discover that the DNP SENS efficiency is correlated with the hydrophilicity of the SOMF/support, which depends on the carbon and SOMF concentration. Nitrogen sorption measurements to determine the BET constant (CBET) were performed. This constant allows us to predict the aggregation of silica nanoparticles and consequently the efficiency of DNP SENS. Under optimal conditions, CBET > 60, we found signal enhancement factors of up to 30.
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Affiliation(s)
- Eva Pump
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Anissa Bendjeriou-Sedjerari
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Jasmine Viger-Gravel
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - David Gajan
- Institut de Sciences Analytiques (CNRS/ENS-Lyon/UCB-Lyon 1) , Université de Lyon , Centre de RMN à Très Hauts Champs , 69100 Villeurbanne , France
| | - Baptiste Scotto
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Manoja K Samantaray
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Edy Abou-Hamad
- King Abdullah University of Science and Technology (KAUST) , Core Labs , Thuwal , 23955-6900 , Saudi Arabia
| | - Andrei Gurinov
- King Abdullah University of Science and Technology (KAUST) , Core Labs , Thuwal , 23955-6900 , Saudi Arabia
| | - Walid Almaksoud
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Zhen Cao
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Anne Lesage
- Institut de Sciences Analytiques (CNRS/ENS-Lyon/UCB-Lyon 1) , Université de Lyon , Centre de RMN à Très Hauts Champs , 69100 Villeurbanne , France
| | - Luigi Cavallo
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Jean-Marie Basset
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia .
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13
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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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14
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Li S, Li J, Tang J, Deng F. Host-guest interaction of styrene and ethylbenzene in MIL-53 studied by solid-state NMR. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2018; 90:1-6. [PMID: 29316473 DOI: 10.1016/j.ssnmr.2017.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/22/2017] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
Solid-state NMR was utilized to explore the host-guest interaction between adsorbate and adsorbent at atomic level to understand the separation mechanism of styrene (St) and ethylbenzene (EB) in MIL-53(Al). 13C-27Al double-resonance NMR experiments revealed that the host-guest interaction between St and MIL-53 was much stronger than that of EB adsorption. In addition, 13C DIPSHIFT experiments suggested that the adsorbed St was less mobile than EB confined inside the MIL-53 pore. Furthermore, the host-guest interaction model between St, EB and MIL-53 was established on the basis of the spatial proximities information extracted from 2D 1H-1H homo-nuclear correlation NMR experiments. According to the experimental observation from solid-state NMR, it was found that the presence of π-π interaction between St and MIL-53 resulted in the stronger host-guest interaction and less mobility of St. This work provides direct experimental evidence for understanding the separation mechanism of St and EB using MIL-53 as an adsorbent.
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Affiliation(s)
- Shenhui Li
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China.
| | - Jing Li
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Jing Tang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
| | - Feng Deng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China.
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15
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Brownbill NJ, Gajan D, Lesage A, Emsley L, Blanc F. Oxygen-17 dynamic nuclear polarisation enhanced solid-state NMR spectroscopy at 18.8 T. Chem Commun (Camb) 2018; 53:2563-2566. [PMID: 28184389 DOI: 10.1039/c6cc09743j] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report 17O dynamic nuclear polarisation (DNP) enhanced solid-state NMR experiments at 18.8 T. Several formulations were investigated on the Mg(OH)2 compound. A signal enhancement factor of 17 could be obtained when the solid particles were incorporated into a glassy o-terphenyl matrix doped with BDPA using the Overhauser polarisation transfer scheme whilst the cross effect mechanism enabled by TEKPol yielded a slightly lower enhancement but more time efficient data acquisition.
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Affiliation(s)
- Nick J Brownbill
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.
| | - David Gajan
- Centre de RMN à Très Hauts Champs, Institut de Sciences Analytiques, Université de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
| | - Anne Lesage
- Centre de RMN à Très Hauts Champs, Institut de Sciences Analytiques, Université de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Frédéric Blanc
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK. and Stephenson Institute for Renewable Energy, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK
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16
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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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17
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Xiao D, Xu S, Han X, Bao X, Liu Z, Blanc F. Direct structural identification of carbenium ions and investigation of host-guest interaction in the methanol to olefins reaction obtained by multinuclear NMR correlations. Chem Sci 2017; 8:8309-8314. [PMID: 29619177 PMCID: PMC5858018 DOI: 10.1039/c7sc03657d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 10/07/2017] [Indexed: 11/21/2022] Open
Abstract
Probing and determining the intermediates formed during catalytic reactions in heterogeneous catalysis are strong challenges. Using 13C labelling and two dimensional 13C-13C through-bond NMR correlations, we directly reveal the structures of a range of carbenium ion species formed during the conversion of methanol to olefins on acidic H-ZSM-5 zeolite by mapping the carbon-carbon bond connectivities. Additionally, we use 13C-27Al and 29Si-13C through-space NMR experiments to probe the interactions between the confined carbon species (including carbenium ions) and the framework of the zeolite, which quantitatively provide an estimate for the carbon-aluminium and carbon-silicon distances, respectively.
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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
| | - 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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18
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Huang Z, Liu D, Camacho-Bunquin J, Zhang G, Yang D, López-Encarnación JM, Xu Y, Ferrandon MS, Niklas J, Poluektov OG, Jellinek J, Lei A, Bunel EE, Delferro M. Supported Single-Site Ti(IV) on a Metal–Organic Framework for the Hydroboration of Carbonyl Compounds. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00544] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhiyuan Huang
- College of Chemistry & Molecular Sciences, Institute of Advanced Studies, Wuhan University, Wuhan 430072, PR China
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Dong Liu
- College of Chemistry & Molecular Sciences, Institute of Advanced Studies, Wuhan University, Wuhan 430072, PR China
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jeffrey Camacho-Bunquin
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Guanghui Zhang
- Department
of Biological and Chemical Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, United States
| | - Dali Yang
- College of Chemistry & Molecular Sciences, Institute of Advanced Studies, Wuhan University, Wuhan 430072, PR China
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Juan M. López-Encarnación
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Department
of Mathematics-Physics, University of Puerto Rico at Cayey, Cayey, Puerto Rico 00736, United States
| | - Yunjie Xu
- Department
of Biological and Chemical Sciences, Illinois Institute of Technology, Chicago, Illinois 60616, United States
| | - Magali S. Ferrandon
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jens Niklas
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Oleg G. Poluektov
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Julius Jellinek
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Aiwen Lei
- College of Chemistry & Molecular Sciences, Institute of Advanced Studies, Wuhan University, Wuhan 430072, PR China
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Emilio E. Bunel
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Massimiliano Delferro
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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19
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Copéret C, Liao WC, Gordon CP, Ong TC. Active Sites in Supported Single-Site Catalysts: An NMR Perspective. J Am Chem Soc 2017; 139:10588-10596. [DOI: 10.1021/jacs.6b12981] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Christophe Copéret
- 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
| | - Christopher P. Gordon
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Ta-Chung Ong
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
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20
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Pump E, Viger-Gravel J, Abou-Hamad E, Samantaray MK, Hamzaoui B, Gurinov A, Anjum DH, Gajan D, Lesage A, Bendjeriou-Sedjerari A, Emsley L, Basset JM. Reactive surface organometallic complexes observed using dynamic nuclear polarization surface enhanced NMR spectroscopy. Chem Sci 2017; 8:284-290. [PMID: 28451174 PMCID: PMC5365068 DOI: 10.1039/c6sc02379g] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 08/12/2016] [Indexed: 01/16/2023] Open
Abstract
Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy (DNP SENS) is an emerging technique that allows access to high-sensitivity NMR spectra from surfaces. However, DNP SENS usually requires the use of radicals as an exogenous source of polarization, which has so far limited applications for organometallic surface species to those that do not react with the radicals. Here we show that reactive surface species can be studied if they are immobilized inside porous materials with suitably small windows, and if bulky nitroxide bi-radicals (here TEKPol) are used as the polarization source and which cannot enter the pores. The method is demonstrated by obtaining significant DNP enhancements from highly reactive complelxes [([triple bond, length as m-dash]Si-O-)W(Me)5] supported on MCM-41, and effects of pore size (6.0, 3.0 and 2.5 nm) on the performance are discussed.
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Affiliation(s)
- Eva Pump
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia . ;
| | - Jasmine Viger-Gravel
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Edy Abou-Hamad
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia . ;
| | - Manoja K Samantaray
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia . ;
| | - Bilel Hamzaoui
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia . ;
| | - Andrei Gurinov
- Imaging and Characterization Lab. King Abdullah University of Science and Technology (KAUST) , Thuwal , 23955-6900 , Saudi Arabia
| | - Dalaver H Anjum
- Imaging and Characterization Lab. King Abdullah University of Science and Technology (KAUST) , Thuwal , 23955-6900 , Saudi Arabia
| | - David Gajan
- Institut de Sciences Analytiques (CNRS/ENS-Lyon/UCB-Lyon 1) , Université de Lyon , Centre de RMN à Très Hauts Champs , 69100 Villeurbanne , France
| | - Anne Lesage
- Institut de Sciences Analytiques (CNRS/ENS-Lyon/UCB-Lyon 1) , Université de Lyon , Centre de RMN à Très Hauts Champs , 69100 Villeurbanne , France
| | - Anissa Bendjeriou-Sedjerari
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia . ;
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Jean-Marie Basset
- King Abdullah University of Science and Technology (KAUST) , KAUST Catalysis Center (KCC) , Thuwal , 23955-6900 , Saudi Arabia . ;
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21
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Conley MP, Lapadula G, Sanders K, Gajan D, Lesage A, del Rosal I, Maron L, Lukens WW, Copéret C, Andersen RA. The Nature of Secondary Interactions at Electrophilic Metal Sites of Molecular and Silica-Supported Organolutetium Complexes from Solid-State NMR Spectroscopy. J Am Chem Soc 2016; 138:3831-43. [PMID: 26887899 DOI: 10.1021/jacs.6b00071] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lu[CH(SiMe3)2]3 reacts with [SiO2-700] to give [(≡SiO)Lu[CH(SiMe3)2]2] and CH2(SiMe3)2. [(≡SiO)Lu[CH(SiMe3)2]2] is characterized by solid-state NMR and EXAFS spectroscopy, which show that secondary Lu···C and Lu···O interactions, involving a γ-CH3 and a siloxane bridge, are present. From X-ray crystallographic analysis, the molecular analogues Lu[CH(SiMe3)2]3-x[O-2,6-tBu-C6H3]x (x = 0-2) also have secondary Lu···C interactions. The (1)H NMR spectrum of Lu[CH(SiMe3)2]3 shows that the -SiMe3 groups are equivalent to -125 °C and inequivalent below that temperature, ΔG(⧧)(Tc = 148 K) = 7.1 kcal mol(-1). Both -SiMe3 groups in Lu[CH(SiMe3)2]3 have (1)JCH = 117 ± 1 Hz at -140 °C. The solid-state (13)C CPMAS NMR spectrum at 20 °C shows three chemically inequivalent resonances in the area ratio of 4:1:1 (12:3:3); the J-resolved spectra for each resonance give (1)JCH = 117 ± 2 Hz. The (29)Si CPMAS NMR spectrum shows two chemically inequivalent resonances with different values of chemical shift anisotropy. Similar observations are obtained for Lu[CH(SiMe3)2]3-x[O-2,6-tBu-C6H3]x (x = 1 and 2). The spectroscopic data point to short Lu···Cγ contacts corresponding to 3c-2e Lu···Cγ-Siβ interactions, which are supported by DFT calculations. Calculated natural bond orbital (NBO) charges show that Cγ carries a negative charge, while Lu, Hγ, and Siβ carry positive charges; as the number of O-based ligands increases so does the positive charge at Lu, which in turns shortens the Lu···Cγ distance. The change in NBO charges and the resulting changes in the spectroscopic and crystallographic properties show how ligands and surface-support sites rearrange to accommodate these changes, consistent with Pauling's electroneutrality concept.
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Affiliation(s)
- Matthew P Conley
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Giuseppe Lapadula
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Kevin Sanders
- Centre de RMN à Très Hauts Champs, CRNS/ENS-Lyon/UCB Lyon 1, Université de Lyon , 5 rue de la Doua, 69100 Villeurbanne, France
| | - David Gajan
- Centre de RMN à Très Hauts Champs, CRNS/ENS-Lyon/UCB Lyon 1, Université de Lyon , 5 rue de la Doua, 69100 Villeurbanne, France
| | - Anne Lesage
- Centre de RMN à Très Hauts Champs, CRNS/ENS-Lyon/UCB Lyon 1, Université de Lyon , 5 rue de la Doua, 69100 Villeurbanne, France
| | - Iker del Rosal
- Université de Toulouse and CNRS, LPCNO INSA/UPS/CNRS , 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France
| | - Laurent Maron
- Université de Toulouse and CNRS, LPCNO INSA/UPS/CNRS , 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France
| | - Wayne W Lukens
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Richard A Andersen
- Department of Chemistry, University of California , Berkeley, California 94720, United States
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22
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Ong T, Liao W, Mougel V, Gajan D, Lesage A, Emsley L, Copéret C. Atomistic Description of Reaction Intermediates for Supported Metathesis Catalysts Enabled by DNP SENS. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510821] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ta‐Chung Ong
- 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
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - David Gajan
- Centre de RMN à Très Hauts Champs Institut de Sciences Analytiques (CNRS/ENS Lyon/UCB Lyon 1) Université de Lyon 69100 Villeurbanne France
| | - Anne Lesage
- Centre de RMN à Très Hauts Champs Institut de Sciences Analytiques (CNRS/ENS Lyon/UCB Lyon 1) Université de Lyon 69100 Villeurbanne France
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
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23
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Ong TC, Liao WC, Mougel V, Gajan D, Lesage A, Emsley L, Copéret C. Atomistic Description of Reaction Intermediates for Supported Metathesis Catalysts Enabled by DNP SENS. Angew Chem Int Ed Engl 2016; 55:4743-7. [DOI: 10.1002/anie.201510821] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 01/29/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Ta-Chung Ong
- 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
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 1-5 8093 Zürich Switzerland
| | - David Gajan
- Centre de RMN à Très Hauts Champs; Institut de Sciences Analytiques (CNRS/ENS Lyon/UCB Lyon 1); Université de Lyon; 69100 Villeurbanne France
| | - Anne Lesage
- Centre de RMN à Très Hauts Champs; Institut de Sciences Analytiques (CNRS/ENS Lyon/UCB Lyon 1); Université de Lyon; 69100 Villeurbanne France
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL); 1015 Lausanne Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 1-5 8093 Zürich Switzerland
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24
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Pucino M, Mougel V, Schowner R, Fedorov A, Buchmeiser MR, Copéret C. Cationic Silica-Supported N-Heterocyclic Carbene Tungsten Oxo Alkylidene Sites: Highly Active and Stable Catalysts for Olefin Metathesis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510678] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Margherita Pucino
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Roman Schowner
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Alexey Fedorov
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Michael R. Buchmeiser
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
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25
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Pucino M, Mougel V, Schowner R, Fedorov A, Buchmeiser MR, Copéret C. Cationic Silica-Supported N-Heterocyclic Carbene Tungsten Oxo Alkylidene Sites: Highly Active and Stable Catalysts for Olefin Metathesis. Angew Chem Int Ed Engl 2016; 55:4300-2. [DOI: 10.1002/anie.201510678] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Margherita Pucino
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Roman Schowner
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Alexey Fedorov
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Michael R. Buchmeiser
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
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26
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Perras FA. Quantitative structure parameters from the NMR spectroscopy of quadrupolar nuclei. PURE APPL CHEM 2016. [DOI: 10.1515/pac-2015-0801] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractNuclear magnetic resonance (NMR) spectroscopy is one of the most important characterization tools in chemistry, however, 3/4 of the NMR active nuclei are underutilized due to their quadrupolar nature. This short review centers on the development of methods that use solid-state NMR of quadrupolar nuclei for obtaining quantitative structural information. Namely, techniques using dipolar recoupling as well as the resolution afforded by double-rotation are presented for the measurement of spin–spin coupling between quadrupoles, enabling the measurement of internuclear distances and connectivities. Two-dimensional J-resolved-type experiments are then presented for the measurement of dipolar and J coupling, between spin-1/2 and quadrupolar nuclei as well as in pairs of quadrupolar nuclei. Select examples utilizing these techniques for the extraction of structural information are given. Techniques are then described that enable the fine refinement of crystalline structures using solely the electric field gradient tensor, measured using NMR, as a constraint. These approaches enable the solution of crystal structures, from polycrystalline compounds, that are of comparable quality to those solved using single-crystal diffraction.
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Affiliation(s)
- Frédéric A. Perras
- 1Ames Laboratory, Iowa State University, 211 Spedding Hall, Ames, IA 50011-3020, USA
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27
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Copéret C, Comas-Vives A, Conley MP, Estes DP, Fedorov A, Mougel V, Nagae H, Núñez-Zarur F, Zhizhko PA. Surface Organometallic and Coordination Chemistry toward Single-Site Heterogeneous Catalysts: Strategies, Methods, Structures, and Activities. Chem Rev 2016; 116:323-421. [PMID: 26741024 DOI: 10.1021/acs.chemrev.5b00373] [Citation(s) in RCA: 492] [Impact Index Per Article: 61.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Matthew P Conley
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Deven P Estes
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Alexey Fedorov
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Haruki Nagae
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland.,Department of Chemistry, Graduate School of Engineering Science, Osaka University, CREST , Toyonaka, Osaka 560-8531, Japan
| | - Francisco Núñez-Zarur
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Pavel A Zhizhko
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland.,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilov str. 28, 119991 Moscow, Russia
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28
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Shuttleworth PS, Baccile N, White RJ, Nectoux E, Budarin VL. Bulk and Surface Analysis of Carbonaceous Materials. POROUS CARBON MATERIALS FROM SUSTAINABLE PRECURSORS 2015. [DOI: 10.1039/9781782622277-00311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
It is difficult to fully characterise the surface chemistry and properties of the complex materials that are carbons. These can range from amorphous-based activated carbons to organised graphene, carbon nanotubes and other forms. However, a combination of techniques, such as, TG supplemented by TGIR, XPS and Boehm titration, bromination with various solid-state NMR methodologies can permit a comprehensive understanding of both their bulk and surface characteristics. The application of these techniques in the characterisation of both the bulk and surface features of carbon-based materials will be presented and discussed ADDIN EN.REFLIST .
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Affiliation(s)
- Peter S. Shuttleworth
- Departamento de Física de Polímeros, Elastómeros y Aplicaciones Energéticas, Instituto de Ciencia y Tecnología de Polímeros CSIC, c/ Juan de la Cierva, 3 28006 Madrid Spain
| | - Niki Baccile
- Laboratoire de Chimie de la Matière Condensée de Paris, Collège de France 11, Place M. Betrthelot 75005 Paris France
| | - Robin J. White
- Universität Freiburg, FMF - Freiburger Materialforschungszentrum, Stefan-Meier-Straße 21, 79104 Freiburg im Breisgau and Institut für Anorganische und Analytische Chemie Albertstrasse 21 79104 Freiburg Germany
| | - Eric Nectoux
- Green Chemistry Centre of Excellence, University of York Heslington, York Yorkshire YO10 5DD UK
| | - Vitaliy L. Budarin
- Green Chemistry Centre of Excellence, University of York Heslington, York Yorkshire YO10 5DD UK
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29
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Protesescu L, Nachtegaal M, Voznyy O, Borovinskaya O, Rossini AJ, Emsley L, Copéret C, Günther D, Sargent EH, Kovalenko MV. Atomistic description of thiostannate-capped CdSe nanocrystals: retention of four-coordinate SnS4 motif and preservation of Cd-rich stoichiometry. J Am Chem Soc 2015; 137:1862-74. [PMID: 25597625 PMCID: PMC4525771 DOI: 10.1021/ja510862c] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Colloidal semiconductor nanocrystals (NCs) are widely studied as building blocks for novel solid-state materials. Inorganic surface functionalization, used to displace native organic capping ligands from NC surfaces, has been a major enabler of electronic solid-state devices based on colloidal NCs. At the same time, very little is known about the atomistic details of the organic-to-inorganic ligand exchange and binding motifs at the NC surface, severely limiting further progress in designing all-inorganic NCs and NC solids. Taking thiostannates (K4SnS4, K4Sn2S6, K6Sn2S7) as typical examples of chalcogenidometallate ligands and oleate-capped CdSe NCs as a model NC system, in this study we address these questions through the combined application of solution (1)H NMR spectroscopy, solution and solid-state (119)Sn NMR spectroscopy, far-infrared and X-ray absorption spectroscopies, elemental analysis, and by DFT modeling. We show that through the X-type oleate-to-thiostannate ligand exchange, CdSe NCs retain their Cd-rich stoichiometry, with a stoichiometric CdSe core and surface Cd adatoms serving as binding sites for terminal S atoms of the thiostannates ligands, leading to all-inorganic (CdSe)core[Cdm(Sn2S7)yK(6y-2m)]shell (taking Sn2S7(6-) ligand as an example). Thiostannates SnS4(4-) and Sn2S7(6-) retain (distorted) tetrahedral SnS4 geometry upon binding to NC surface. At the same time, experiments and simulations point to lower stability of Sn2S6(4-) (and SnS3(2-)) in most solvents and its lower adaptability to the NC surface caused by rigid Sn2S2 rings.
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Affiliation(s)
- Loredana Protesescu
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1, Zurich CH-8093, Switzerland
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30
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Conley MP, Forrest WP, Mougel V, Copéret C, Schrock RR. Bulky Aryloxide Ligand Stabilizes a Heterogeneous Metathesis Catalyst. Angew Chem Int Ed Engl 2014; 53:14221-4. [DOI: 10.1002/anie.201408880] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Indexed: 11/11/2022]
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31
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32
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O’Keefe CA, Johnston KE, Sutter K, Autschbach J, Gauvin R, Trébosc J, Delevoye L, Popoff N, Taoufik M, Oudatchin K, Schurko RW. An Investigation of Chlorine Ligands in Transition-Metal Complexes via 35Cl Solid-State NMR and Density Functional Theory Calculations. Inorg Chem 2014; 53:9581-97. [DOI: 10.1021/ic501004u] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christopher A. O’Keefe
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Karen E. Johnston
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Kiplangat Sutter
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Régis Gauvin
- Université
Lille Nord de France, CNRS UMR8181, Unité de Catalyse et de
Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq, France
| | - Julien Trébosc
- Université
Lille Nord de France, CNRS UMR8181, Unité de Catalyse et de
Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq, France
| | - Laurent Delevoye
- Université
Lille Nord de France, CNRS UMR8181, Unité de Catalyse et de
Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq, France
| | - Nicolas Popoff
- Laboratoire
de Chimie, Catalyse, Polymères et Procédés (UMR-C2P2-5265
CNRS/ESCPE-Lyon/UCBL) ESCPE Lyon, F-308-43, Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Mostafa Taoufik
- Laboratoire
de Chimie, Catalyse, Polymères et Procédés (UMR-C2P2-5265
CNRS/ESCPE-Lyon/UCBL) ESCPE Lyon, F-308-43, Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Konstantin Oudatchin
- Steacie Institute for
Molecular Sciences, National Research Council, 100 Sussex Drive, Ottawa, Ontario K1A OR6, Canada
| | - Robert W. Schurko
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
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33
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Conley MP, Copéret C, Thieuleux C. Mesostructured Hybrid Organic–Silica Materials: Ideal Supports for Well-Defined Heterogeneous Organometallic Catalysts. ACS Catal 2014. [DOI: 10.1021/cs500262t] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Matthew P. Conley
- ETH Zürich, Department of Chemistry and Applied Biosciences, Vladimir Prelog Weg 2, CH-8093 Zürich, Switzerland
| | - Christophe Copéret
- ETH Zürich, Department of Chemistry and Applied Biosciences, Vladimir Prelog Weg 2, CH-8093 Zürich, Switzerland
| | - Chloé Thieuleux
- Université de Lyon, Institut de Chimie de Lyon, UMR C2P2 CNRS-UCBL-ESCPE Lyon Equipe Chimie OrganoMétallique de Surface 43 Bvd, du 11 Novembre 1918, 69616 Villeurbanne, France
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34
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Conley MP, Copéret C. State of the Art and Perspectives in the “Molecular Approach” Towards Well-Defined Heterogeneous Catalysts. Top Catal 2014. [DOI: 10.1007/s11244-014-0245-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Chen Y, Ould-Chikh S, Abou-Hamad E, Callens E, Mohandas JC, Khalid S, Basset JM. Facile and Efficient Synthesis of the Surface Tantalum Hydride (≡SiO)2TaIIIH and Tris-Siloxy Tantalum (≡SiO)3TaIII Starting from Novel Tantalum Surface Species (≡SiO)TaMe4 and (≡SiO)2TaMe3. Organometallics 2014. [DOI: 10.1021/om4012196] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yin Chen
- Physical Sciences and Engineering, KAUST Catalysis
Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Samy Ould-Chikh
- Physical Sciences and Engineering, KAUST Catalysis
Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Edy Abou-Hamad
- Physical Sciences and Engineering, KAUST Catalysis
Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Emmanuel Callens
- Physical Sciences and Engineering, KAUST Catalysis
Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Janet C. Mohandas
- Physical Sciences and Engineering, KAUST Catalysis
Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Syed Khalid
- Brookhaven National Laboratory, 75 Brookhaven Avenue, Upton, New York 11973-5000, United States
| | - Jean-Marie Basset
- Physical Sciences and Engineering, KAUST Catalysis
Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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36
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Bonhomme C, Gervais C, Laurencin D. Recent NMR developments applied to organic-inorganic materials. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2014; 77:1-48. [PMID: 24411829 DOI: 10.1016/j.pnmrs.2013.10.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 10/17/2013] [Indexed: 06/03/2023]
Abstract
In this contribution, the latest developments in solid state NMR are presented in the field of organic-inorganic (O/I) materials (or hybrid materials). Such materials involve mineral and organic (including polymeric and biological) components, and can exhibit complex O/I interfaces. Hybrids are currently a major topic of research in nanoscience, and solid state NMR is obviously a pertinent spectroscopic tool of investigation. Its versatility allows the detailed description of the structure and texture of such complex materials. The article is divided in two main parts: in the first one, recent NMR methodological/instrumental developments are presented in connection with hybrid materials. In the second part, an exhaustive overview of the major classes of O/I materials and their NMR characterization is presented.
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Affiliation(s)
- Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France.
| | - Christel Gervais
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Danielle Laurencin
- Institut Charles Gerhardt de Montpellier, UMR5253, CNRS UM2 UM1 ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
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37
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Rossini AJ, Zagdoun A, Lelli M, Lesage A, Copéret C, Emsley L. Dynamic nuclear polarization surface enhanced NMR spectroscopy. Acc Chem Res 2013; 46:1942-51. [PMID: 23517009 DOI: 10.1021/ar300322x] [Citation(s) in RCA: 409] [Impact Index Per Article: 37.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Many of the functions and applications of advanced materials result from their interfacial structures and properties. However, the difficulty in characterizing the surface structure of these materials at an atomic level can often slow their further development. Solid-state NMR can probe surface structure and complement established surface science techniques, but its low sensitivity often limits its application. Many materials have low surface areas and/or low concentrations of active/surface sites. Dynamic nuclear polarization (DNP) is one intriguing method to enhance the sensitivity of solid-state NMR experiments by several orders of magnitude. In a DNP experiment, the large polarization of unpaired electrons is transferred to surrounding nuclei, which provides a maximum theoretical DNP enhancement of ∼658 for (1)H NMR. In this Account, we discuss the application of DNP to enhance surface NMR signals, an approach known as DNP surface enhanced NMR spectroscopy (DNP SENS). Enabling DNP for these systems requires bringing an exogeneous radical solution into contact with surfaces without diluting the sample. We proposed the incipient wetness impregnation technique (IWI), a well-known method in materials science, to impregnate porous and particulate materials with just enough radical containing solution to fill the porous volume. IWI offers several advantages: it is extremely simple, provides a uniform wetting of the surface, and does not increase the sample volume or substantially reduce the concentration of the sample. This Account describes the basic principles behind DNP SENS through results obtained for mesoporous and nanoparticulate samples impregnated with radical solutions. We also discuss the quantification of the overall sensitivity enhancements obtained with DNP SENS and compare that with ordinary room temperature NMR spectroscopy. We then review the development of radicals and solvents that give the best possible enhancements today. With the best polarizing mixtures, DNP SENS enhances sensitivity by a factor of up to 100, which decreases acquisition time by five orders of magnitude. Such enhancement enables the detailed and expedient atomic level characterization of the surfaces of complex materials at natural isotopic abundance and opens new avenues for NMR. To illustrate these improvements, we describe the successful application of DNP SENS to characterize hybrid materials, organometallic surface species, and metal-organic frameworks.
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Affiliation(s)
- Aaron J. Rossini
- Centre de RMN a Tres Hauts Champs, Universite de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
| | - Alexandre Zagdoun
- Centre de RMN a Tres Hauts Champs, Universite de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
| | - Moreno Lelli
- Centre de RMN a Tres Hauts Champs, Universite de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
| | - Anne Lesage
- Centre de RMN a Tres Hauts Champs, Universite de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
| | - Christophe Copéret
- Department of Chemistry, Laboratory of Inorganic Chemistry, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Lyndon Emsley
- Centre de RMN a Tres Hauts Champs, Universite de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
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38
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Conley MP, Drost RM, Baffert M, Gajan D, Elsevier C, Franks WT, Oschkinat H, Veyre L, Zagdoun A, Rossini A, Lelli M, Lesage A, Casano G, Ouari O, Tordo P, Emsley L, Copéret C, Thieuleux C. A Well-Defined Pd Hybrid Material for theZ-Selective Semihydrogenation of Alkynes Characterized at the Molecular Level by DNP SENS. Chemistry 2013; 19:12234-8. [DOI: 10.1002/chem.201302484] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Indexed: 11/11/2022]
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39
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Johnston KE, O'Keefe CA, Gauvin RM, Trébosc J, Delevoye L, Amoureux JP, Popoff N, Taoufik M, Oudatchin K, Schurko RW. A Study of Transition-Metal Organometallic Complexes Combining35Cl Solid-State NMR Spectroscopy and35Cl NQR Spectroscopy and First-Principles DFT Calculations. Chemistry 2013; 19:12396-414. [DOI: 10.1002/chem.201301268] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Indexed: 11/10/2022]
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40
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Srebro M, Autschbach J. Computational Analysis of47/49Ti NMR Shifts and Electric Field Gradient Tensors of Half-Titanocene Complexes: Structure-Bonding-Property Relationships. Chemistry 2013; 19:12018-33. [DOI: 10.1002/chem.201301301] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Indexed: 11/08/2022]
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41
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Pell AJ, Clément RJ, Grey CP, Emsley L, Pintacuda G. Frequency-stepped acquisition in nuclear magnetic resonance spectroscopy under magic angle spinning. J Chem Phys 2013; 138:114201. [DOI: 10.1063/1.4795001] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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42
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Blanc F, Sperrin L, Jefferson DA, Pawsey S, Rosay M, Grey CP. Dynamic nuclear polarization enhanced natural abundance 17O spectroscopy. J Am Chem Soc 2013; 135:2975-8. [PMID: 23379257 DOI: 10.1021/ja4004377] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We show that natural abundance oxygen-17 NMR of solids could be obtained in minutes at a moderate magnetic field strength by using dynamic nuclear polarization (DNP). Electron spin polarization could be transferred either directly to (17)O spins or indirectly via (1)H spins in inorganic oxides and hydroxides using an oxygen-free solution containing a biradical polarization agent (bTbK). The results open up a powerful method for rapidly acquiring high signal-to-noise ratio solid-state NMR spectra of (17)O nuclear spins and to probe sites on or near the surface, without the need for isotope labeling.
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Affiliation(s)
- Frédéric Blanc
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom.
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43
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Popoff N, Espinas J, Pelletier J, Macqueron B, Szeto KC, Boyron O, Boisson C, Del Rosal I, Maron L, De Mallmann A, Gauvin RM, Taoufik M. Small Changes Have Consequences: Lessons from Tetrabenzyltitanium and -zirconium Surface Organometallic Chemistry. Chemistry 2012. [DOI: 10.1002/chem.201202737] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Clément RJ, Pell AJ, Middlemiss DS, Strobridge FC, Miller JK, Whittingham MS, Emsley L, Grey CP, Pintacuda G. Spin-Transfer Pathways in Paramagnetic Lithium Transition-Metal Phosphates from Combined Broadband Isotropic Solid-State MAS NMR Spectroscopy and DFT Calculations. J Am Chem Soc 2012; 134:17178-85. [DOI: 10.1021/ja306876u] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Raphaële J. Clément
- Centre de RMN à Très
Hauts Champs, UMR 5280 CNRS/Ecole Normale Supérieure de Lyon/UCB,
Lyon 1, 69100 Villeurbanne, France
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
CB2 1EW, United Kingdom
| | - Andrew J. Pell
- Centre de RMN à Très
Hauts Champs, UMR 5280 CNRS/Ecole Normale Supérieure de Lyon/UCB,
Lyon 1, 69100 Villeurbanne, France
| | - Derek S. Middlemiss
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
CB2 1EW, United Kingdom
| | - Fiona C. Strobridge
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
CB2 1EW, United Kingdom
| | - Joel K. Miller
- Department
of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902-6000, United States
| | - M. Stanley Whittingham
- Department
of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902-6000, United States
| | - Lyndon Emsley
- Centre de RMN à Très
Hauts Champs, UMR 5280 CNRS/Ecole Normale Supérieure de Lyon/UCB,
Lyon 1, 69100 Villeurbanne, France
| | - Clare P. Grey
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge,
CB2 1EW, United Kingdom
| | - Guido Pintacuda
- Centre de RMN à Très
Hauts Champs, UMR 5280 CNRS/Ecole Normale Supérieure de Lyon/UCB,
Lyon 1, 69100 Villeurbanne, France
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45
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Merle N, Trébosc J, Baudouin A, Rosal ID, Maron L, Szeto K, Genelot M, Mortreux A, Taoufik M, Delevoye L, Gauvin RM. 17O NMR Gives Unprecedented Insights into the Structure of Supported Catalysts and Their Interaction with the Silica Carrier. J Am Chem Soc 2012; 134:9263-75. [DOI: 10.1021/ja301085m] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Nicolas Merle
- Laboratoire de Chimie Organométallique
de Surface (C2P2-UMR 5265
CNRS/UCBL/ICL) ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616
Villeurbanne Cedex, France
| | - Julien Trébosc
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
| | - Anne Baudouin
- Laboratoire de Chimie Organométallique
de Surface (C2P2-UMR 5265
CNRS/UCBL/ICL) ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616
Villeurbanne Cedex, France
| | - Iker Del Rosal
- Université de Toulouse, INSA, UPS, CNRS-UMR5215, LPCNO, 135 avenue
de Rangueil, 31077 Toulouse, France
| | - Laurent Maron
- Université de Toulouse, INSA, UPS, CNRS-UMR5215, LPCNO, 135 avenue
de Rangueil, 31077 Toulouse, France
| | - Kai Szeto
- Laboratoire de Chimie Organométallique
de Surface (C2P2-UMR 5265
CNRS/UCBL/ICL) ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616
Villeurbanne Cedex, France
| | - Marie Genelot
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
| | - André Mortreux
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
| | - Mostafa Taoufik
- Laboratoire de Chimie Organométallique
de Surface (C2P2-UMR 5265
CNRS/UCBL/ICL) ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616
Villeurbanne Cedex, France
| | - Laurent Delevoye
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
| | - Régis M. Gauvin
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
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46
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Brown SP. Applications of high-resolution 1H solid-state NMR. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2012; 41:1-27. [PMID: 22177472 DOI: 10.1016/j.ssnmr.2011.11.006] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 11/15/2011] [Accepted: 11/16/2011] [Indexed: 05/25/2023]
Abstract
This article reviews the large increase in applications of high-resolution (1)H magic-angle spinning (MAS) solid-state NMR, in particular two-dimensional heteronuclear and homonuclear (double-quantum and spin-diffusion NOESY-like exchange) experiments, in the last five years. These applications benefit from faster MAS frequencies (up to 80 kHz), higher magnetic fields (up to 1 GHz) and pulse sequence developments (e.g., homonuclear decoupling sequences applicable under moderate and fast MAS). (1)H solid-state NMR techniques are shown to provide unique structural insight for a diverse range of systems including pharmaceuticals, self-assembled supramolecular structures and silica-based inorganic-organic materials, such as microporous and mesoporous materials and heterogeneous organometallic catalysts, for which single-crystal diffraction structures cannot be obtained. The power of NMR crystallography approaches that combine experiment with first-principles calculations of NMR parameters (notably using the GIPAW approach) are demonstrated, e.g., to yield quantitative insight into hydrogen-bonding and aromatic CH-π interactions, as well as to generate trial three-dimensional packing arrangements. It is shown how temperature-dependent changes in the (1)H chemical shift, linewidth and DQ-filtered signal intensity can be analysed to determine the thermodynamics and kinetics of molecular level processes, such as the making and breaking of hydrogen bonds, with particular application to proton-conducting materials. Other applications to polymers and biopolymers, inorganic compounds and bioinorganic systems, paramagnetic compounds and proteins are presented. The potential of new technological advances such as DNP methods and new microcoil designs is described.
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Affiliation(s)
- Steven P Brown
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
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47
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Zagdoun A, Casano G, Ouari O, Lapadula G, Rossini AJ, Lelli M, Baffert M, Gajan D, Veyre L, Maas WE, Rosay M, Weber RT, Thieuleux C, Coperet C, Lesage A, Tordo P, Emsley L. A slowly relaxing rigid biradical for efficient dynamic nuclear polarization surface-enhanced NMR spectroscopy: expeditious characterization of functional group manipulation in hybrid materials. J Am Chem Soc 2012; 134:2284-91. [PMID: 22191415 DOI: 10.1021/ja210177v] [Citation(s) in RCA: 147] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new nitroxide-based biradical having a long electron spin-lattice relaxation time (T(1e)) has been developed as an exogenous polarization source for DNP solid-state NMR experiments. The performance of this new biradical is demonstrated on hybrid silica-based mesostructured materials impregnated with 1,1,2,2-tetrachloroethane radical containing solutions, as well as in frozen bulk solutions, yielding DNP enhancement factors (ε) of over 100 at a magnetic field of 9.4 T and sample temperatures of ~100 K. The effects of radical concentration on the DNP enhancement factors and on the overall sensitivity enhancements (Σ(†)) are reported. The relatively high DNP efficiency of the biradical is attributed to an increased T(1e), which enables more effective saturation of the electron resonance. This new biradical is shown to outperform the polarizing agents used so far in DNP surface-enhanced NMR spectroscopy of materials, yielding a 113-fold increase in overall sensitivity for silicon-29 CPMAS spectra as compared to conventional NMR experiments at room temperature. This results in a reduction in experimental times by a factor >12,700, making the acquisition of (13)C and (15)N one- and two-dimensional NMR spectra at natural isotopic abundance rapid (hours). It has been used here to monitor a series of chemical reactions carried out on the surface functionalities of a hybrid organic-silica material.
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Affiliation(s)
- Alexandre Zagdoun
- Centre de RMN à Très Hauts Champs, Université de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France
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Vitzthum V, Miéville P, Carnevale D, Caporini MA, Gajan D, Copéret C, Lelli M, Zagdoun A, Rossini AJ, Lesage A, Emsley L, Bodenhausen G. Dynamic nuclear polarization of quadrupolar nuclei using cross polarization from protons: surface-enhanced aluminium-27 NMR. Chem Commun (Camb) 2012; 48:1988-90. [PMID: 22237253 DOI: 10.1039/c2cc15905h] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The surface of γ-alumina nanoparticles can be characterized by dynamic nuclear polarization (DNP) surface-enhanced NMR of (27)Al. DNP is combined with cross-polarization and MQ-MAS to determine local symmetries of (27)Al sites at the surface.
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Affiliation(s)
- Veronika Vitzthum
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, EPFL, Batochime, 1015 Lausanne, Switzerland
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Bendjeriou-Sedjerari A, Pelletier JDA, Abou-hamad E, Emsley L, Basset JM. A well-defined mesoporous amine silica surface via a selective treatment of SBA-15 with ammonia. Chem Commun (Camb) 2012; 48:3067-9. [DOI: 10.1039/c2cc00143h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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