1
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Cerofolini L, Parigi G, Ravera E, Fragai M, Luchinat C. Solid-state NMR methods for the characterization of bioconjugations and protein-material interactions. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2022; 122:101828. [PMID: 36240720 DOI: 10.1016/j.ssnmr.2022.101828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/26/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
Protein solid-state NMR has evolved dramatically over the last two decades, with the development of new hardware and sample preparation methodologies. This technique is now ripe for complex applications, among which one can count bioconjugation, protein chemistry and functional biomaterials. In this review, we provide our account on this aspect of protein solid-state NMR.
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Affiliation(s)
- Linda Cerofolini
- Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy
| | - Giacomo Parigi
- Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy; Magnetic Resonance Center (CERM), Università degli Studi di Firenze, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy; Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Enrico Ravera
- Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy; Magnetic Resonance Center (CERM), Università degli Studi di Firenze, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy; Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy; Florence Data Science, Università degli Studi di Firenze, Italy.
| | - Marco Fragai
- Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy; Magnetic Resonance Center (CERM), Università degli Studi di Firenze, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy; Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy.
| | - Claudio Luchinat
- Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy; Magnetic Resonance Center (CERM), Università degli Studi di Firenze, Via Luigi Sacconi 6, 50019, Sesto Fiorentino, Italy; Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy.
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2
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Reif B. Deuteration for High-Resolution Detection of Protons in Protein Magic Angle Spinning (MAS) Solid-State NMR. Chem Rev 2021; 122:10019-10035. [PMID: 34870415 DOI: 10.1021/acs.chemrev.1c00681] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Proton detection developed in the last 20 years as the method of choice to study biomolecules in the solid state. In perdeuterated proteins, proton dipolar interactions are strongly attenuated, which allows yielding of high-resolution proton spectra. Perdeuteration and backsubstitution of exchangeable protons is essential if samples are rotated with MAS rotation frequencies below 60 kHz. Protonated samples can be investigated directly without spin dilution using proton detection methods in case the MAS frequency exceeds 110 kHz. This review summarizes labeling strategies and the spectroscopic methods to perform experiments that yield assignments, quantitative information on structure, and dynamics using perdeuterated samples. Techniques for solvent suppression, H/D exchange, and deuterium spectroscopy are discussed. Finally, experimental and theoretical results that allow estimation of the sensitivity of proton detected experiments as a function of the MAS frequency and the external B0 field in a perdeuterated environment are compiled.
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Affiliation(s)
- Bernd Reif
- Bayerisches NMR Zentrum (BNMRZ) at the Department of Chemistry, Technische Universität München (TUM), Lichtenbergstr. 4, 85747 Garching, Germany.,Helmholtz-Zentrum München (HMGU), Deutsches Forschungszentrum für Gesundheit und Umwelt, Institute of Structural Biology (STB), Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
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3
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Koppe J, Bußkamp M, Hansen MR. Frequency-Swept Ultra-Wideline Magic-Angle Spinning NMR Spectroscopy. J Phys Chem A 2021; 125:5643-5649. [PMID: 34138561 DOI: 10.1021/acs.jpca.1c02958] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recent years have witnessed the development of solid-state NMR techniques that allow the direct investigation of extremely wide inhomogeneously broadened resonance lines. To date, this typically involves the application of frequency sweeps as offered by wideband uniform rate smooth truncation (WURST) pulses. While the effects of such advanced irradiation schemes on static samples are well understood, the interference between the varying carrier frequency and the time-dependent evolution of the spin system under magic-angle spinning (MAS) conditions is more complex. Herein, we introduce the well-known WURST-Carr-Purcell-Meiboom-Gill (WCPMG) pulse sequence for spinning samples. Using numerical spin-density matrix analysis, an ideal design based on fast frequency sweeps and high truncation of the incorporated WURST pulses is presented that enables uniform excitation/refocusing under MAS conditions with low-to-moderate radio-frequency power requirements. This permits the acquisition of ultra-wideline MAS NMR lines exceeding 500 kHz with chemical shift resolution in a single transmitter step.
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Affiliation(s)
- Jonas Koppe
- Institute for Physical Chemistry, Westfälische Wilhelms-Universität, Corrensstr. 28/30, DE-48149 Münster, Germany
| | - Max Bußkamp
- Institute for Physical Chemistry, Westfälische Wilhelms-Universität, Corrensstr. 28/30, DE-48149 Münster, Germany
| | - Michael Ryan Hansen
- Center for Multiscale Theory and Computation (CMTC), Westfälische Wilhelms-Universität, Corrensstrasse 40, DE-48149 Münster, Germany
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4
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Walder BJ, Alam TM. Quantification of Uncoupled Spin Domains in Spin-Abundant Disordered Solids. Int J Mol Sci 2020; 21:ijms21113938. [PMID: 32486288 PMCID: PMC7313085 DOI: 10.3390/ijms21113938] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 05/28/2020] [Accepted: 05/28/2020] [Indexed: 01/19/2023] Open
Abstract
Materials often contain minor heterogeneous phases that are difficult to characterize yet nonetheless significantly influence important properties. Here we describe a solid-state NMR strategy for quantifying minor heterogenous sample regions containing dilute, essentially uncoupled nuclei in materials where the remaining nuclei experience heteronuclear dipolar couplings. NMR signals from the coupled nuclei are dephased while NMR signals from the uncoupled nuclei can be amplified by one or two orders of magnitude using Carr-Meiboom-Purcell-Gill (CPMG) acquisition. The signal amplification by CPMG can be estimated allowing the concentration of the uncoupled spin regions to be determined even when direct observation of the uncoupled spin NMR signal in a single pulse experiment would require an impractically long duration of signal averaging. We use this method to quantify residual graphitic carbon using 13C CPMG NMR in poly(carbon monofluoride) samples synthesized by direct fluorination of carbon from various sources. Our detection limit for graphitic carbon in these materials is better than 0.05 mol%. The accuracy of the method is discussed and comparisons to other methods are drawn.
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5
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Martín Morales E, Coppel Y, Lecante P, Del Rosal I, Poteau R, Esvan J, Sutra P, Philippot K, Igau A. When organophosphorus ruthenium complexes covalently bind to ruthenium nanoparticles to form nanoscale hybrid materials. Chem Commun (Camb) 2020; 56:4059-4062. [PMID: 32195508 DOI: 10.1039/d0cc00442a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A hybrid material made of mononuclear organophosphorus polypyridyl ruthenium complexes covalently bonded to ruthenium nanoparticles has been synthesized via a one-pot organometallic procedure and finely characterized. These results open new avenues to access unique hybrid transition metal nanomaterials.
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Affiliation(s)
- Elena Martín Morales
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, F-31077, Toulouse Cedex 04, France and Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse Cedex 04, France.
| | - Yannick Coppel
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, F-31077, Toulouse Cedex 04, France and Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse Cedex 04, France.
| | - Pierre Lecante
- CEMES-CNRS, 29 rue Jeanne Marvig BP4347, 31053 Toulouse Cedex, France
| | - Iker Del Rosal
- LPCNO (IRSAMC), Université de Toulouse, INSA, UPS, CNRS (UMR 5215), Institut National des Sciences Appliquées, 135 avenue de Rangueil, F-31077 Toulouse, France
| | - Romuald Poteau
- LPCNO (IRSAMC), Université de Toulouse, INSA, UPS, CNRS (UMR 5215), Institut National des Sciences Appliquées, 135 avenue de Rangueil, F-31077 Toulouse, France
| | - Jérôme Esvan
- CIRIMAT, Université de Toulouse, CNRS-INPT-UPS, 4 Allée Emile Monso, BP 44362, 31030 Toulouse, France
| | - Pierre Sutra
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, F-31077, Toulouse Cedex 04, France and Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse Cedex 04, France.
| | - Karine Philippot
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, F-31077, Toulouse Cedex 04, France and Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse Cedex 04, France.
| | - Alain Igau
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, F-31077, Toulouse Cedex 04, France and Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse Cedex 04, France.
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6
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Bruno F, Francischello R, Bellomo G, Gigli L, Flori A, Menichetti L, Tenori L, Luchinat C, Ravera E. Multivariate Curve Resolution for 2D Solid-State NMR spectra. Anal Chem 2020; 92:4451-4458. [PMID: 32069028 PMCID: PMC7997113 DOI: 10.1021/acs.analchem.9b05420] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We present a processing method, based on the multivariate curve resolution approach (MCR), to denoise 2D solid-state NMR spectra, yielding a substantial S/N ratio increase while preserving the lineshapes and relative signal intensities. These spectral features are particularly important in the quantification of silicon species, where sensitivity is limited by the low natural abundance of the 29Si nuclei and by the dilution of the intrinsic protons of silica, but can be of interest also when dealing with other intermediate-to-low receptivity nuclei. This method also offers the possibility of coprocessing multiple 2D spectra that have the signals at the same frequencies but with different intensities (e.g.: as a result of a variation in the mixing time). The processing can be carried out on the time-domain data, thus preserving the possibility of applying further processing to the data. As a demonstration, we have applied Cadzow denoising on the MCR-processed FIDs, achieving a further increase in the S/N ratio and more effective denoising also on the transients at longer indirect evolution times. We have applied the combined denoising on a set of experimental data from a lysozyme-silica composite.
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Affiliation(s)
- Francesco Bruno
- Magnetic Resonance Center (CERM), University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (CIRMMP), via L. Sacconi 6, 50019 Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Roberto Francischello
- Institute of Clinical Physiology, National Research Council, Via G. Moruzzi, 1 56124 Pisa, Italy.,Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, 56124 Pisa, Italy
| | - Giovanni Bellomo
- Magnetic Resonance Center (CERM), University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (CIRMMP), via L. Sacconi 6, 50019 Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Lucia Gigli
- Magnetic Resonance Center (CERM), University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (CIRMMP), via L. Sacconi 6, 50019 Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Alessandra Flori
- Fondazione Regione Toscana G. Monasterio, Via G. Moruzzi 1, Pisa 56124, Italy
| | - Luca Menichetti
- Institute of Clinical Physiology, National Research Council, Via G. Moruzzi, 1 56124 Pisa, Italy.,Fondazione Regione Toscana G. Monasterio, Via G. Moruzzi 1, Pisa 56124, Italy
| | - Leonardo Tenori
- Magnetic Resonance Center (CERM), University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (CIRMMP), via L. Sacconi 6, 50019 Sesto Fiorentino, Italy
| | - Claudio Luchinat
- Magnetic Resonance Center (CERM), University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (CIRMMP), via L. Sacconi 6, 50019 Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Enrico Ravera
- Magnetic Resonance Center (CERM), University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (CIRMMP), via L. Sacconi 6, 50019 Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
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7
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Yan C, Kayser F, Dieden R. Sensitivity enhancement via multiple contacts in the {1H–29Si}–1H cross polarization experiment: a case study of modified silica nanoparticle surfaces. RSC Adv 2020; 10:23016-23023. [PMID: 35520326 PMCID: PMC9054631 DOI: 10.1039/d0ra04995f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 06/10/2020] [Indexed: 01/21/2023] Open
Abstract
{1H–29Si}–1H double cross polarization inverse detection (DCPi) solid-state NMR, has recently been shown to be a powerful tool for studying molecules adsorbed on the silica surface. In this contribution, we develop an improved version (MCPi) which incorporates a block of multiple contact pulses, and quantitatively compare the sensitivities of MCPi and DCPi over a typical range of experimental parameters. The MCPi pulse sequence aims at higher sensitivity and robustness for studying samples with various relaxation characteristics. In the case of dimethyl sulfoxide (DMSO) molecules adsorbed on the silica surface, MCPi performs equally well or up to 2.5 times better than DCPi over a wide range of parameters. The applicability to and performance of MCPi on composite materials was demonstrated using a sample of polymer–silica composite, where significantly higher sensitivity could be achieved at very long total mixing times. The results also showed that both techniques are surface specific in the sense that only the groups close to the surface can be detected. In this paper we demonstrate {1H–29Si}–1H multiple cross polarization inverse detection (MCPi) solid state NMR as a robust technique for studying modified silica nanoparticle surfaces.![]()
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Affiliation(s)
- Chuanyu Yan
- Luxembourg Institute of Science and Technology
- Department of “Materials Research and Technology”
- L-4362 Esch-sur-Alzette
- Luxembourg
- University of Luxembourg
| | - François Kayser
- Goodyear Innovation Center Luxembourg
- L-7750 Colmar-Berg
- Luxembourg
| | - Reiner Dieden
- Luxembourg Institute of Science and Technology
- Department of “Materials Research and Technology”
- L-4362 Esch-sur-Alzette
- Luxembourg
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8
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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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9
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Smith CA, Narouz MR, Lummis PA, Singh I, Nazemi A, Li CH, Crudden CM. N-Heterocyclic Carbenes in Materials Chemistry. Chem Rev 2019; 119:4986-5056. [PMID: 30938514 DOI: 10.1021/acs.chemrev.8b00514] [Citation(s) in RCA: 353] [Impact Index Per Article: 70.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
N-Heterocyclic carbenes (NHCs) have become one of the most widely studied class of ligands in molecular chemistry and have found applications in fields as varied as catalysis, the stabilization of reactive molecular fragments, and biochemistry. More recently, NHCs have found applications in materials chemistry and have allowed for the functionalization of surfaces, polymers, nanoparticles, and discrete, well-defined clusters. In this review, we provide an in-depth look at recent advances in the use of NHCs for the development of functional materials.
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Affiliation(s)
- Christene A Smith
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Mina R Narouz
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Paul A Lummis
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Ishwar Singh
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Ali Nazemi
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Chien-Hung Li
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Cathleen M Crudden
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6.,Institute of Transformative Bio-Molecules, ITbM-WPI , Nagoya University , Nagoya , Chikusa 464-8601 , Japan
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10
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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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11
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Kolyagin YG, Yakimov AV, Tolborg S, Vennestrøm PNR, Ivanova II. Direct Observation of Tin in Different T-Sites of Sn-BEA by One- and Two-Dimensional 119Sn MAS NMR Spectroscopy. J Phys Chem Lett 2018; 9:3738-3743. [PMID: 29874083 DOI: 10.1021/acs.jpclett.8b01415] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The direct and quantitative identification of active sites is crucial for the development of zeolite catalysts and their implementation in industry. Herein we report on the application of one-dimensional 119Sn direct polarization (DP) and rotational echo double-resonance (REDOR) and two-dimensional 119Sn magic-angle tuning (MAT) NMR spectroscopy for the identification of different Sn sites in fully dehydrated Sn-BEA zeolite. It is demonstrated that 119Sn magic-angle spinning (MAS) NMR techniques, modified by Carr-Purcell-Meiboom-Gill (CPMG) echo-train acquisition allow to resolve three groups of NMR signals, which can be attributed to three groups of nonequivalent T-sites based on the existing theoretical predictions: (I) T9, T4, and T3; (II) T2, T1, and T8; and (III) T7, T5, and T6. Results suggest that the sites attributed to group III are the most populated in Sn-BEA samples obtained via the fluoride route. The attribution of NMR lines to different T-sites in the structure of BEA allows for the establishment of structure-reactivity relationship and therefore for further improvement of Sn-BEA catalysts.
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Affiliation(s)
- Yury G Kolyagin
- Department of Chemistry , Lomonosov Moscow State University , Leninskie gory 1 , 119234 Moscow , Russia
- A.V. Topchiev Institute of Petrochemical Synthesis RAS , 119992 Moscow , Russia
| | - Alexander V Yakimov
- Department of Chemistry , Lomonosov Moscow State University , Leninskie gory 1 , 119234 Moscow , Russia
| | - Søren Tolborg
- Haldor Topsøe A/S , Haldor Topsøes Allé 1 , DK-2800 Kgs. Lyngby , Denmark
| | - Peter N R Vennestrøm
- Haldor Topsøe A/S , Haldor Topsøes Allé 1 , DK-2800 Kgs. Lyngby , Denmark
- Umicore Denmark ApS , Nøjsomhedsvej 20 , DK-2800 Kgs. Lyngby , Denmark
| | - Irina I Ivanova
- Department of Chemistry , Lomonosov Moscow State University , Leninskie gory 1 , 119234 Moscow , Russia
- A.V. Topchiev Institute of Petrochemical Synthesis RAS , 119992 Moscow , Russia
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12
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Mason HE, Uribe EC, Shusterman JA. Rapid acquisition of data dense solid-state CPMG NMR spectral sets using multi-dimensional statistical analysis. Phys Chem Chem Phys 2018; 20:18082-18088. [PMID: 29932185 DOI: 10.1039/c8cp02382d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The development of multi-dimensional statistical methods has been demonstrated on variable contact time (VCT) 29Si{1H} cross-polarization magic angle spinning (CP/MAS) data sets collected using Carr-Purcell-Meiboom-Gill (CPMG) type acquisition. These methods utilize the transformation of the collected 2D VCT data set into a 3D data set and use tensor-rank decomposition to extract the spectral components that vary as a function of transverse relaxation time (T2) and CP contact time. The result is a data dense spectral set that can be used to reconstruct CP/MAS spectra at any contact time with a high signal to noise ratio and with an excellent agreement to 29Si{1H} CP/MAS spectra collected using conventional acquisition. These CPMG data can be collected in a fraction of time that would be required to collect a conventional VCT data set. We demonstrate the method on samples of functionalized mesoporous silica materials and show that the method can provide valuable surface specific information about their functional chemistry.
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Affiliation(s)
- H E Mason
- Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, CA, USA.
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Martínez-Prieto LM, Rakers L, López-Vinasco AM, Cano I, Coppel Y, Philippot K, Glorius F, Chaudret B, van Leeuwen PWNM. Soluble Platinum Nanoparticles Ligated by Long-Chain N-Heterocyclic Carbenes as Catalysts. Chemistry 2017; 23:12779-12786. [DOI: 10.1002/chem.201702288] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Luis M. Martínez-Prieto
- LPCNO; Laboratoire de Physique et Chimie des Nano-Objets, UMR5215 INSA-CNRS UPS; Institut des Sciences appliquées; 135, Avenue de Rangueil 31077 Toulouse France
| | - Lena Rakers
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Münster Germany
| | - Angela M. López-Vinasco
- LPCNO; Laboratoire de Physique et Chimie des Nano-Objets, UMR5215 INSA-CNRS UPS; Institut des Sciences appliquées; 135, Avenue de Rangueil 31077 Toulouse France
| | - Israel Cano
- LPCNO; Laboratoire de Physique et Chimie des Nano-Objets, UMR5215 INSA-CNRS UPS; Institut des Sciences appliquées; 135, Avenue de Rangueil 31077 Toulouse France
| | - Yannick Coppel
- LCC; Laboratoire de Chimie de Coordination; CNRS, UPS; 205, Route de Narbonne 31077 Toulouse France
| | - Karine Philippot
- LCC; Laboratoire de Chimie de Coordination; CNRS, UPS; 205, Route de Narbonne 31077 Toulouse France
| | - Frank Glorius
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Münster Germany
| | - Bruno Chaudret
- LPCNO; Laboratoire de Physique et Chimie des Nano-Objets, UMR5215 INSA-CNRS UPS; Institut des Sciences appliquées; 135, Avenue de Rangueil 31077 Toulouse France
| | - Piet W. N. M. van Leeuwen
- LPCNO; Laboratoire de Physique et Chimie des Nano-Objets, UMR5215 INSA-CNRS UPS; Institut des Sciences appliquées; 135, Avenue de Rangueil 31077 Toulouse France
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14
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Martínez-Prieto LM, Cano I, Márquez A, Baquero EA, Tricard S, Cusinato L, Del Rosal I, Poteau R, Coppel Y, Philippot K, Chaudret B, Cámpora J, van Leeuwen PWNM. Zwitterionic amidinates as effective ligands for platinum nanoparticle hydrogenation catalysts. Chem Sci 2017; 8:2931-2941. [PMID: 28451359 PMCID: PMC5376718 DOI: 10.1039/c6sc05551f] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 01/31/2017] [Indexed: 11/21/2022] Open
Abstract
Pt NPs covered with zwitterionic amidinates as ligands exhibit an exciting ligand effect in the hydrogenation of carbonyl groups when electron donor/acceptor groups are introduced in the N-substituents.
Ligand control of metal nanoparticles (MNPs) is rapidly gaining importance as ligands can stabilize the MNPs and regulate their catalytic properties. Herein we report the first example of Pt NPs ligated by imidazolium-amidinate ligands that bind strongly through the amidinate anion to the platinum surface atoms. The binding was established by 15N NMR spectroscopy, a precedent for nitrogen ligands on MNPs, and XPS. Both monodentate and bidentate coordination modes were found. DFT showed a high bonding energy of up to –48 kcal mol–1 for bidentate bonding to two adjacent metal atoms, which decreased to –28 ± 4 kcal mol–1 for monodentate bonding in the absence of impediments by other ligands. While the surface is densely covered with ligands, both IR and 13C MAS NMR spectra proved the adsorption of CO on the surface and thus the availability of sites for catalysis. A particle size dependent Knight shift was observed in the 13C MAS NMR spectra for the atoms that coordinate to the surface, but for small particles, ∼1.2 nm, it almost vanished, as theory for MNPs predicts; this had not been experimentally verified before. The Pt NPs were found to be catalysts for the hydrogenation of ketones and a notable ligand effect was observed in the hydrogenation of electron-poor carbonyl groups. The catalytic activity is influenced by remote electron donor/acceptor groups introduced in the aryl-N-substituents of the amidinates; p-anisyl groups on the ligand gave catalysts several times faster the ligand containing p-chlorophenyl groups.
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Affiliation(s)
- L M Martínez-Prieto
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
| | - I Cano
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
| | - A Márquez
- Instituto de Investigaciones Químicas , CSIC-Universidad de Sevilla , C/Américo Vespucio, 49 , 41092 Sevilla , Spain .
| | - E A Baquero
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
| | - S Tricard
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
| | - L Cusinato
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
| | - I Del Rosal
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
| | - R Poteau
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
| | - Y Coppel
- CNRS , LCC (Laboratoire de Chimie de Coordination) , Université de Toulouse , UPS , INPT , 205 route de Narbonne, BP 44099 , F-31077-Toulouse Cedex 4 , France
| | - K Philippot
- CNRS , LCC (Laboratoire de Chimie de Coordination) , Université de Toulouse , UPS , INPT , 205 route de Narbonne, BP 44099 , F-31077-Toulouse Cedex 4 , France
| | - B Chaudret
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
| | - J Cámpora
- Instituto de Investigaciones Químicas , CSIC-Universidad de Sevilla , C/Américo Vespucio, 49 , 41092 Sevilla , Spain .
| | - P W N M van Leeuwen
- LPCNO , Laboratoire de Physique et Chimie des Nano-Objets , UMR5215 INSA-CNRS-UPS , Institut des Sciences Appliquées , 135, Avenue de Rangueil , F-31077 Toulouse , France . ;
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Cano I, Martínez-Prieto LM, Fazzini PF, Coppel Y, Chaudret B, van Leeuwen PWNM. Characterization of secondary phosphine oxide ligands on the surface of iridium nanoparticles. Phys Chem Chem Phys 2017; 19:21655-21662. [DOI: 10.1039/c7cp03439c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The coordination mode of secondary phosphine oxide ligands on the surface of iridium nanoparticle catalysts was elucidated by solid-state NMR.
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Affiliation(s)
- Israel Cano
- Laboratoire de Physique et Chimie des Nano Objets
- LPCNO
- UMR5215 INSA-UPS-CNRS
- Institut National des Sciences Appliquées
- 135 Avenue de Rangueil
| | - Luis M. Martínez-Prieto
- Laboratoire de Physique et Chimie des Nano Objets
- LPCNO
- UMR5215 INSA-UPS-CNRS
- Institut National des Sciences Appliquées
- 135 Avenue de Rangueil
| | - Pier F. Fazzini
- Laboratoire de Physique et Chimie des Nano Objets
- LPCNO
- UMR5215 INSA-UPS-CNRS
- Institut National des Sciences Appliquées
- 135 Avenue de Rangueil
| | - Yannick Coppel
- CNRS
- LCC (Laboratoire de Chimie de Coordination) 205 Route de Narbonne
- F-31077 Toulouse Cedex 04
- France
- Universite’ de Toulouse
| | - Bruno Chaudret
- Laboratoire de Physique et Chimie des Nano Objets
- LPCNO
- UMR5215 INSA-UPS-CNRS
- Institut National des Sciences Appliquées
- 135 Avenue de Rangueil
| | - Piet W. N. M. van Leeuwen
- Laboratoire de Physique et Chimie des Nano Objets
- LPCNO
- UMR5215 INSA-UPS-CNRS
- Institut National des Sciences Appliquées
- 135 Avenue de Rangueil
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16
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Kobayashi T, Singappuli-Arachchige D, Wang Z, Slowing II, Pruski M. Spatial distribution of organic functional groups supported on mesoporous silica nanoparticles: a study by conventional and DNP-enhanced 29Si solid-state NMR. Phys Chem Chem Phys 2017; 19:1781-1789. [DOI: 10.1039/c6cp07642d] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DNP-enhanced solid-state NMR determined spatial distributions of organic functionalities attached to surfaces of mesoporous silica nanoparticles via co-condensation and grafting.
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Affiliation(s)
| | | | - Zhuoran Wang
- U.S. DOE Ames Laboratory
- Iowa State University
- Ames
- USA
- Department of Chemistry
| | - Igor I. Slowing
- U.S. DOE Ames Laboratory
- Iowa State University
- Ames
- USA
- Department of Chemistry
| | - Marek Pruski
- U.S. DOE Ames Laboratory
- Iowa State University
- Ames
- USA
- Department of Chemistry
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17
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Asensio JM, Tricard S, Coppel Y, Andrés R, Chaudret B, de Jesús E. Knight Shift in
13
C NMR Resonances Confirms the Coordination of N‐Heterocyclic Carbene Ligands to Water‐Soluble Palladium Nanoparticles. Angew Chem Int Ed Engl 2016; 56:865-869. [DOI: 10.1002/anie.201610251] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Juan M. Asensio
- Departamento de Química Orgánica y Química Inorgánica Universidad de Alcalá Campus Universitario 28871 Alcalá de Henares Spain
| | - Simon Tricard
- Laboratoire de Physique et Chimie des Nano-Objets, INSA, CNRS Université de Toulouse 135, Avenue de Rangueil 31077 Toulouse France
| | - Yannick Coppel
- Laboratoire de Chimie de Coordination (LCC), CNRS 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
| | - Román Andrés
- Departamento de Química Orgánica y Química Inorgánica Universidad de Alcalá Campus Universitario 28871 Alcalá de Henares Spain
| | - Bruno Chaudret
- Laboratoire de Physique et Chimie des Nano-Objets, INSA, CNRS Université de Toulouse 135, Avenue de Rangueil 31077 Toulouse France
| | - Ernesto de Jesús
- Departamento de Química Orgánica y Química Inorgánica Universidad de Alcalá Campus Universitario 28871 Alcalá de Henares Spain
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18
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Asensio JM, Tricard S, Coppel Y, Andrés R, Chaudret B, de Jesús E. Knight Shift in
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C NMR Resonances Confirms the Coordination of N‐Heterocyclic Carbene Ligands to Water‐Soluble Palladium Nanoparticles. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201610251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Juan M. Asensio
- Departamento de Química Orgánica y Química Inorgánica Universidad de Alcalá Campus Universitario 28871 Alcalá de Henares Spain
| | - Simon Tricard
- Laboratoire de Physique et Chimie des Nano-Objets, INSA, CNRS Université de Toulouse 135, Avenue de Rangueil 31077 Toulouse France
| | - Yannick Coppel
- Laboratoire de Chimie de Coordination (LCC), CNRS 205 route de Narbonne, BP44099 31077 Toulouse Cedex 4 France
| | - Román Andrés
- Departamento de Química Orgánica y Química Inorgánica Universidad de Alcalá Campus Universitario 28871 Alcalá de Henares Spain
| | - Bruno Chaudret
- Laboratoire de Physique et Chimie des Nano-Objets, INSA, CNRS Université de Toulouse 135, Avenue de Rangueil 31077 Toulouse France
| | - Ernesto de Jesús
- Departamento de Química Orgánica y Química Inorgánica Universidad de Alcalá Campus Universitario 28871 Alcalá de Henares Spain
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19
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Kolyagin YG, Yakimov AV, Tolborg S, Vennestrøm PNR, Ivanova II. Application of (119)Sn CPMG MAS NMR for Fast Characterization of Sn Sites in Zeolites with Natural (119)Sn Isotope Abundance. J Phys Chem Lett 2016; 7:1249-1253. [PMID: 26978430 DOI: 10.1021/acs.jpclett.6b00249] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
(119)Sn CPMG MAS NMR is demonstrated to be a fast and efficient method for characterization of Sn-sites in Sn-containing zeolites. Tuning of the CPMG echo-train sequence decreases the experimental time by a factor of 5-40 in the case of as-synthesized and hydrated Sn-BEA samples and by 3 orders of magnitude in the case of dehydrated Sn-BEA samples as compared to conventional methods. In the latter case, the reconstruction of the quantitative spectrum without the loss of sensitivity is shown to be possible. The method proposed allows obtaining (119)Sn MAS NMR spectra with improved resolution for Sn-BEA zeolites with natural (119)Sn isotope abundance using conventional MAS NMR equipment.
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Affiliation(s)
- Yury G Kolyagin
- Department of Chemistry, Lomonosov Moscow State University , Leninskie gory 1, 119991, Moscow, Russia
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninskiy prospect 29, 119992, Moscow, Russia
| | - Alexander V Yakimov
- Department of Chemistry, Lomonosov Moscow State University , Leninskie gory 1, 119991, Moscow, Russia
| | - Søren Tolborg
- Haldor Topsøe A/S, Haldor Topsøes Allé 1, DK-2800 Kongens Lyngby, Denmark
- Department of Chemistry, Technical University of Denmark , Kemitorvet, DK-2800 Kongens Lyngby, Denmark
| | | | - Irina I Ivanova
- Department of Chemistry, Lomonosov Moscow State University , Leninskie gory 1, 119991, Moscow, Russia
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninskiy prospect 29, 119992, Moscow, Russia
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Linser R, Sarkar R, Krushelnitzky A, Mainz A, Reif B. Dynamics in the solid-state: perspectives for the investigation of amyloid aggregates, membrane proteins and soluble protein complexes. JOURNAL OF BIOMOLECULAR NMR 2014; 59:1-14. [PMID: 24595988 DOI: 10.1007/s10858-014-9822-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 02/26/2014] [Indexed: 06/03/2023]
Abstract
Aggregates formed by amyloidogenic peptides and proteins and reconstituted membrane protein preparations differ significantly in terms of the spectral quality that they display in solid-state NMR experiments. Structural heterogeneity and dynamics can both in principle account for that observation. This perspectives article aims to point out challenges and limitations, but also potential opportunities in the investigation of these systems.
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Affiliation(s)
- Rasmus Linser
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Ave, Boston, MA, 02115, USA
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21
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Vogt FG, Roberts-Skilton K, Kennedy-Gabb SA. A Solid-State NMR Study of Amorphous Ezetimibe Dispersions in Mesoporous Silica. Pharm Res 2013; 30:2315-31. [DOI: 10.1007/s11095-013-1075-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2013] [Accepted: 05/06/2013] [Indexed: 10/26/2022]
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22
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Kandel K, Althaus SM, Peeraphatdit C, Kobayashi T, Trewyn BG, Pruski M, Slowing II. Solvent-Induced Reversal of Activities between Two Closely Related Heterogeneous Catalysts in the Aldol Reaction. ACS Catal 2013. [DOI: 10.1021/cs300748g] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kapil Kandel
- U.S.
Department of Energy, Ames Laboratory and ‡Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111,
United States
| | - Stacey M. Althaus
- U.S.
Department of Energy, Ames Laboratory and ‡Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111,
United States
| | - Chorthip Peeraphatdit
- U.S.
Department of Energy, Ames Laboratory and ‡Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111,
United States
| | - Takeshi Kobayashi
- U.S.
Department of Energy, Ames Laboratory and ‡Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111,
United States
| | - Brian G. Trewyn
- U.S.
Department of Energy, Ames Laboratory and ‡Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111,
United States
| | - Marek Pruski
- U.S.
Department of Energy, Ames Laboratory and ‡Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111,
United States
| | - Igor I. Slowing
- U.S.
Department of Energy, Ames Laboratory and ‡Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111,
United States
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23
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Alonso B, Marichal C. Solid-state NMR studies of micelle-templated mesoporous solids. Chem Soc Rev 2013; 42:3808-20. [DOI: 10.1039/c2cs35368g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Kobayashi T, Lafon O, Lilly Thankamony AS, Slowing II, Kandel K, Carnevale D, Vitzthum V, Vezin H, Amoureux JP, Bodenhausen G, Pruski M. Analysis of sensitivity enhancement by dynamic nuclear polarization in solid-state NMR: a case study of functionalized mesoporous materials. Phys Chem Chem Phys 2013; 15:5553-62. [DOI: 10.1039/c3cp00039g] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Kandel K, Althaus SM, Peeraphatdit C, Kobayashi T, Trewyn BG, Pruski M, Slowing II. Substrate inhibition in the heterogeneous catalyzed aldol condensation: A mechanistic study of supported organocatalysts. J Catal 2012. [DOI: 10.1016/j.jcat.2012.04.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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26
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Deschamps M, Roiland C, Bureau B, Yang G, Le Pollès L, Massiot D. 77Se solid-state NMR investigations on As(x)Se(1-x) glasses using CPMG acquisition under MAS. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2011; 40:72-77. [PMID: 21741223 DOI: 10.1016/j.ssnmr.2011.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 06/14/2011] [Accepted: 06/16/2011] [Indexed: 05/31/2023]
Abstract
(77)Se (I=1/2) solid-state NMR is a very sensitive probe of the local structure of selenide glasses, which themselves are promising for optical applications. In this work, we show that although (77)Se has a low natural abundance (7.58%) and a wide spectral range, the sensitivity can be dramatically increased using Carr-Purcell-Meiboom-Gill (CPMG) trains of rotor-synchronized π pulses during the detection of (77)Se magnetization but may be affected by chemical shift anisotropy when the Magic Angle Spinning rate is not fast enough and by offset effects. The indirect dimension of the T(2)(CPMG)-resolved spectrum shows a strong influence of the J-couplings between naturally occurring (77)Se pairs. The resulting spectra show that the structural model known as "chains crossing model" is not entirely suitable to describe the glassy network of the Se-rich compositions.
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Kobayashi T, Mao K, Wang SG, Lin VSY, Pruski M. Molecular ordering of mixed surfactants in mesoporous silicas: a solid-state NMR study. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2011; 39:65-71. [PMID: 21392947 DOI: 10.1016/j.ssnmr.2011.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Revised: 01/03/2011] [Accepted: 02/05/2011] [Indexed: 05/30/2023]
Abstract
The use of mixed surfactants in the synthesis of mesoporous silica nanoparticles (MSNs) is of importance in the context of adjusting pore structures, sizes and morphologies. In the present study, the arrangement of molecules in micelles produced from a mixture of two surfactants, cetyltrimethylammonium bromide (CTAB) and cetylpyridinium bromide (CPB) was detailed by solid-state NMR spectroscopy. Proximities of methyl protons in the trimethylammonium headgroup of CTAB and protons in the pyridinium headgroup of CPB were observed under fast magic angle spinning (MAS) by (1)H-(1)H double quantum (DQ) MAS NMR and NOESY. This result suggested that CTAB and CPB co-exist in the pores without forming significant monocomponent domain structures. (1)H-(29)Si heteronuclear correlation (HETCOR) NMR showed that protons in the headgroups of CTAB are in closer proximity to the silica surface than those in the CPB headgroups. The structural information obtained in this investigation leads to better understanding of the mechanisms of self-assembly and their role in determining the structure and morphology of mesoporous materials.
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28
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Lee D, Balmer JA, Schmid A, Tonnar J, Armes SP, Titman JJ. Solid-state nuclear magnetic resonance studies of vinyl polymer/silica colloidal nanocomposite particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:15592-15598. [PMID: 20825200 DOI: 10.1021/la102298x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Solid-state nuclear magnetic resonance (NMR) has been used to characterize the interface between the organic and inorganic components of "core-shell" colloidal nanocomposite particles synthesized by in situ aqueous (co)polymerization of styrene and/or n-butyl acrylate in the presence of a glycerol-functionalized silica sol. Polymer protons are in close proximity (<5 A) to surface silanol sites in all the nanocomposites studied, indicating that either styrene or n-butyl side groups extend between the glycerol-functional silane molecules toward the surface of the silica particles. For the poly(styrene-co-n-butyl acrylate)/silica nanocomposite n-butyl acrylate residues are located closer to the surface of the silica particle than styrene residues, suggesting a specific interaction between the former and the glycerol-functionalized silica surface. The most likely explanation is a hydrogen bond between the ester carbonyl and the glycerol groups, although this cannot be observed directly. For the Bindzil CC40 glycerol-functionalized silica sol the relative intensities of (29)Si NMR lines corresponding to T and Q(3) environments imply that there are approximately twice as many unreacted silanol groups on the silica surface as attached silane molecules.
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Affiliation(s)
- Daniel Lee
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
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29
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Mao K, Kobayashi T, Wiench JW, Chen HT, Tsai CH, Lin VSY, Pruski M. Conformations of Silica-Bound (Pentafluorophenyl)propyl Groups Determined by Solid-State NMR Spectroscopy and Theoretical Calculations. J Am Chem Soc 2010; 132:12452-7. [DOI: 10.1021/ja105007b] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kanmi Mao
- U.S. DOE Ames Laboratory, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Takeshi Kobayashi
- U.S. DOE Ames Laboratory, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Jerzy W. Wiench
- U.S. DOE Ames Laboratory, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Hung-Ting Chen
- U.S. DOE Ames Laboratory, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Chih-Hsiang Tsai
- U.S. DOE Ames Laboratory, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Victor S.-Y. Lin
- U.S. DOE Ames Laboratory, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Marek Pruski
- U.S. DOE Ames Laboratory, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
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Hung I, Gan Z. On the practical aspects of recording wideline QCPMG NMR spectra. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2010; 204:256-265. [PMID: 20359918 DOI: 10.1016/j.jmr.2010.03.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 03/02/2010] [Accepted: 03/02/2010] [Indexed: 05/29/2023]
Abstract
The practical aspects of applying CPMG for acquisition of wideline powder patterns are examined. It is shown that most distortions/modulations of spikelet spectra can be traced to the incoherent signal averaging from multiple coherence transfer pathways. A strategy for minimizing these distortions/modulations is described. Also, a few interesting observations regarding the implementation of the wideline WURST-QCPMG experiment are presented, namely the accumulation of second-order signal phase and the effects of varying the sweep rate and rf field of chirp pulses.
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Affiliation(s)
- Ivan Hung
- Center of Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, FL 32310, USA
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31
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Massiot D, Fayon F, Deschamps M, Cadars S, Florian P, Montouillout V, Pellerin N, Hiet J, Rakhmatullin A, Bessada C. Detection and use of small J couplings in solid state NMR experiments. CR CHIM 2010. [DOI: 10.1016/j.crci.2009.05.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Wiench JW, Michon C, Ellern A, Hazendonk P, Iuga A, Angelici RJ, Pruski M. Solid-State NMR Investigations of the Immobilization of a BF4− Salt of a Palladium(II) Complex on Silica. J Am Chem Soc 2009; 131:11801-10. [DOI: 10.1021/ja902982u] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jerzy W. Wiench
- U.S. DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011, Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Christophe Michon
- U.S. DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011, Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Arkady Ellern
- U.S. DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011, Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Paul Hazendonk
- U.S. DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011, Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Adriana Iuga
- U.S. DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011, Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Robert J. Angelici
- U.S. DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011, Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Marek Pruski
- U.S. DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011, Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
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33
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Sensitivity enhancement of 29Si double-quantum dipolar recoupling spectroscopy by Carr–Purcell–Meiboom–Gill acquisition method. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.07.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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34
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Guerry P, Smith ME, Brown SP. 31P MAS Refocused INADEQUATE Spin−Echo (REINE) NMR Spectroscopy: Revealing J Coupling and Chemical Shift Two-Dimensional Correlations in Disordered Solids. J Am Chem Soc 2009; 131:11861-74. [DOI: 10.1021/ja902238s] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paul Guerry
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Mark E. Smith
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Steven P. Brown
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
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35
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Rapp JL, Huang Y, Natella M, Cai Y, Lin VSY, Pruski M. A solid-state NMR investigation of the structure of mesoporous silica nanoparticle supported rhodium catalysts. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2009; 35:82-86. [PMID: 19181489 DOI: 10.1016/j.ssnmr.2008.12.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2008] [Revised: 12/09/2008] [Accepted: 12/10/2008] [Indexed: 05/27/2023]
Abstract
A detailed study of the chemical structure of mesoporous silica catalysts containing rhodium ligands and nanoparticles (RhP-MSN) was carried out by multi-dimensional solid-state NMR techniques. The degree of functionalization of the rhodium-phosphinosilyl complex to the surface of the RhP-MSN channels was determined by (29)Si NMR experiments. The structural assignments of the rhodium-phosphinosilyl complex were unambiguously determined by employing the novel, indirectly detected heteronuclear correlation ((13)C-(1)H and (31)P-(1)H idHETCOR) techniques, which indicated that oxidation of the attached phosphinosilyl groups and detachment of Rh was enhanced upon syngas conversion.
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Affiliation(s)
- Jennifer L Rapp
- US DOE Ames Laboratory, Iowa State University, Ames, IA 50011, USA
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