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Bakhmutov VI, Elliott DW, Contreras-Ramirez A, Drake H, Zhou HC. Acidic Centers on the Surface of a Crystalline α-Sn(IV) Phosphate Characterized by the Solid-State 1H, 2H, 31P, and 119Sn MAS NMR Techniques. Inorg Chem 2022; 61:17759-17766. [PMID: 36269387 DOI: 10.1021/acs.inorgchem.2c03047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A layered crystalline phosphate α-Sn(HPO4)2·H2O (1), prepared and characterized in the present study by the multinuclear solid-state nuclear magnetic resonance (NMR), powder X-ray diffraction, and thermogravimetric analysis techniques, was treated with D2O and HOD imitating the reaction conditions in a water medium. The 2H solid-echo magic angle spinning NMR spectra of the products have revealed on their surface low mobile water molecules and hydronium ions, forming a structure close to the Zundel cation, [D2O···D-OD2]+. All the deuterons in the hydronium ions are tangled by hydrogen bonds with the water and the surface phosphate groups and stabilized by ionic interactions.
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Affiliation(s)
- Vladimir I Bakhmutov
- Department of Chemistry, Texas A&M University, College Station, Texas77843, United States
| | - Douglas W Elliott
- Department of Chemistry, Texas A&M University, College Station, Texas77843, United States
| | - Aida Contreras-Ramirez
- Department of Chemistry, Texas A&M University, College Station, Texas77843, United States
| | - Hannah Drake
- Department of Chemistry, Texas A&M University, College Station, Texas77843, United States
| | - Hong-Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, Texas77843, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas77843-3003, United States
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2
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Beerwerth J, Storek M, Greim D, Lueg J, Siegel R, Cetinkaya B, Hiller W, Zimmermann H, Senker J, Böhmer R. Two-site jumps in dimethyl sulfone studied by one- and two-dimensional 17O NMR spectroscopy. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2018; 288:84-94. [PMID: 29438834 DOI: 10.1016/j.jmr.2018.01.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 01/23/2018] [Accepted: 01/27/2018] [Indexed: 06/08/2023]
Abstract
Polycrystalline dimethyl sulfone is studied using central-transition oxygen-17 exchange NMR. The quadrupolar and chemical shift tensors are determined by combining quantum chemical calculations with line shape analyses of rigid-lattice spectra measured for stationary and rotating samples at several external magnetic fields. Quantum chemical computations predict that the largest principal axes of the chemical shift anisotropy and electrical field gradient tensors enclose an angle of about 73°. This prediction is successfully tested by comparison with absorption spectra recorded at three different external magnetic fields. The experimental one-dimensional motionally narrowed spectra and the two-dimensional exchange spectrum are compatible with model calculations involving jumps of the molecules about their two-fold symmetry axis. This motion is additionally investigated by means of two-time stimulated-echo spectroscopy which allows for a determination of motional correlation functions over a wider temperature range than previously reported using carbon and deuteron NMR. On the basis of suitable second-order quadrupolar frequency distributions, sin-sin stimulated-echo amplitudes are calculated for a two-site model in the limit of vanishing evolution time and compared with experimental findings. The present study thus establishes oxygen-17 NMR as a powerful method that will be particularly useful for the study of solids and liquids devoid of nuclei governed by first-order anisotropies.
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Affiliation(s)
- J Beerwerth
- Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - M Storek
- Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - D Greim
- Anorganische Chemie III, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - J Lueg
- Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - R Siegel
- Anorganische Chemie III, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - B Cetinkaya
- Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - W Hiller
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, D-44221 Dortmund, Germany
| | - H Zimmermann
- Department of Biomolecular Mechanisms, Max Planck-Institut für Medizinische Forschung, 69120 Heidelberg, Germany
| | - J Senker
- Anorganische Chemie III, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - R Böhmer
- Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
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3
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Meirovitch E, Liang Z, Freed JH. Protein dynamics in the solid-state from 2H NMR lineshape analysis. III. MOMD in the presence of Magic Angle Spinning. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2018; 89:35-44. [PMID: 29208317 PMCID: PMC5772661 DOI: 10.1016/j.ssnmr.2017.11.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 11/11/2017] [Accepted: 11/13/2017] [Indexed: 06/07/2023]
Abstract
We report on a new approach to the analysis of dynamic NMR lineshapes from polycrystalline (i.e., macroscopically disordered) samples in the presence of Magic Angle Spinning (MAS). This is an application of the Stochastic Liouville Equation developed by Freed and co-workers for treating restricted (i.e., microscopically ordered) motions. The 2H nucleus in an internally-mobile C-CD3 moiety serves as a prototype probe. The acronym is 2H/MOMD/MAS, where MOMD stands for "microscopic-order-macroscopic-disorder." The key elements describing internal motions - their type, the local spatial restrictions, and related features of local geometry - are treated in MOMD generally, within their rigorous three-dimensional tensorial requirements. Based on this representation a single physically well-defined model of local motion has the capability of reproducing experimental spectra. There exist other methods for analyzing dynamic 2H/MAS spectra which advocate simple motional modes. Yet, to reproduce satisfactorily the experimental lineshapes, one has either to use unusual parameter values, or combine several simple motional modes. The multi-simple-mode reasoning assumes independence of the constituent modes, features ambiguity as different simple modes may be used, renders inter-system comparison difficult as the overall models differ, and makes possible model-improvement only by adding yet another simple mode, i.e., changing the overall model. 2H/MOMD/MAS is free of such limitations and inherently provides a clear physical interpretation. These features are illustrated. The advantage of 2H/MOMD/MAS in dealing with sensitive but hardly investigated slow-motional lineshapes is demonstrated by applying it to actual experimental data. The results differ from those obtained previously with a two-site exchange scheme that yielded unusual parameters.
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Affiliation(s)
- Eva Meirovitch
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.
| | - Zhichun Liang
- Baker Laboratory of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853-1301, USA
| | - Jack H Freed
- Baker Laboratory of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853-1301, USA
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4
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Lindh EL, Terenzi C, Salmén L, Furó I. Water in cellulose: evidence and identification of immobile and mobile adsorbed phases by 2H MAS NMR. Phys Chem Chem Phys 2017; 19:4360-4369. [DOI: 10.1039/c6cp08219j] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The organization of water molecules adsorbed onto cellulose and the supramolecular hydrated structure of microfibril aggregates represents, still today, one of the open and complex questions in the physical chemistry of natural polymers.
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Affiliation(s)
- E. L. Lindh
- Division of Applied Physical Chemistry
- Department of Chemistry
- KTH Royal Institute of Technology
- SE-10044 Stockholm
- Sweden
| | - C. Terenzi
- Division of Applied Physical Chemistry
- Department of Chemistry
- KTH Royal Institute of Technology
- SE-10044 Stockholm
- Sweden
| | - L. Salmén
- Wallenberg Wood Science Center
- KTH Royal Institute of Technology
- SE-10044 Stockholm
- Sweden
- Innventia AB
| | - I. Furó
- Division of Applied Physical Chemistry
- Department of Chemistry
- KTH Royal Institute of Technology
- SE-10044 Stockholm
- Sweden
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5
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Shi X, Rienstra CM. Site-Specific Internal Motions in GB1 Protein Microcrystals Revealed by 3D ²H-¹³C-¹³C Solid-State NMR Spectroscopy. J Am Chem Soc 2016; 138:4105-19. [PMID: 26849428 PMCID: PMC4819898 DOI: 10.1021/jacs.5b12974] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Indexed: 02/04/2023]
Abstract
(2)H quadrupolar line shapes deliver rich information about protein dynamics. A newly designed 3D (2)H-(13)C-(13)C solid-state NMR magic angle spinning (MAS) experiment is presented and demonstrated on the microcrystalline β1 immunoglobulin binding domain of protein G (GB1). The implementation of (2)H-(13)C adiabatic rotor-echo-short-pulse-irradiation cross-polarization (RESPIRATION CP) ensures the accuracy of the extracted line shapes and provides enhanced sensitivity relative to conventional CP methods. The 3D (2)H-(13)C-(13)C spectrum reveals (2)H line shapes for 140 resolved aliphatic deuterium sites. Motional-averaged (2)H quadrupolar parameters obtained from the line-shape fitting identify side-chain motions. Restricted side-chain dynamics are observed for a number of polar residues including K13, D22, E27, K31, D36, N37, D46, D47, K50, and E56, which we attribute to the effects of salt bridges and hydrogen bonds. In contrast, we observe significantly enhanced side-chain flexibility for Q2, K4, K10, E15, E19, N35, N40, and E42, due to solvent exposure and low packing density. T11, T16, and T17 side chains exhibit motions with larger amplitudes than other Thr residues due to solvent interactions. The side chains of L5, V54, and V29 are highly rigid because they are packed in the core of the protein. High correlations were demonstrated between GB1 side-chain dynamics and its biological function. Large-amplitude side-chain motions are observed for regions contacting and interacting with immunoglobulin G (IgG). In contrast, rigid side chains are primarily found for residues in the structural core of the protein that are absent from protein binding and interactions.
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Affiliation(s)
- Xiangyan Shi
- Department of Chemistry, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Chad M. Rienstra
- Department of Chemistry, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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6
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Shi X, Holland GP, Yarger JL. Molecular Dynamics of Spider Dragline Silk Fiber Investigated by 2H MAS NMR. Biomacromolecules 2015; 16:852-9. [DOI: 10.1021/bm5017578] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Xiangyan Shi
- Department
of Chemistry, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Gregory P. Holland
- Department
of Chemistry and Biochemistry, San Diego State University, 5500
Campanile Drive, San Diego, California 92182-1030, United States
| | - Jeffery L. Yarger
- Department
of Chemistry and Biochemistry, Magnetic Resonance Research Center, Arizona State University, Tempe, Arizona 85287-1604, United States
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7
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Chan-Huot M, Wimperis S, Gervais C, Bodenhausen G, Duma L. Deuterium MAS NMR Studies of Dynamics on Multiple Timescales: Histidine and Oxalic Acid. Chemphyschem 2014; 16:204-15. [DOI: 10.1002/cphc.201402506] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 11/11/2022]
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8
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Kins CF, Brunklaus G, Spiess HW. New Phosphonate-Based Additives for Fortification in Model Epoxies. Macromolecules 2013. [DOI: 10.1021/ma400093w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christoph F. Kins
- Max-Planck-Institut für Polymerforschung, Postfach 31 48, D-55021
Mainz, Germany
| | - Gunther Brunklaus
- Institut
für Physikalische
Chemie, Westfälische Wilhelms-Universität Münster, Corrensstr. 28/30, D-48149 Münster,
Germany
| | - Hans Wolfgang Spiess
- Max-Planck-Institut für Polymerforschung, Postfach 31 48, D-55021
Mainz, Germany
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9
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Shi X, Yarger JL, Holland GP. 2H-13C HETCOR MAS NMR for indirect detection of 2H quadrupole patterns and spin-lattice relaxation rates. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2013; 226:1-12. [PMID: 23174312 DOI: 10.1016/j.jmr.2012.10.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 10/17/2012] [Accepted: 10/22/2012] [Indexed: 06/01/2023]
Abstract
Two-dimensional (2D) cross-polarization magic angle spinning (CP-MAS) (2)H-(13)C heteronuclear correlation (HETCOR) experiments were utilized to indirectly detect site-specific deuterium MAS powder patterns. The (2)H-(13)C cross-polarization efficiency is orientation-dependent and non-uniform for all crystallites. This leads to difficulty in extracting the correct (2)H MAS quadrupole powder patterns. In order to obtain accurate deuterium line shapes, (13)C spin lock rf field, spin lock rf ramp and CP contact time were carefully calibrated with the assistance of theoretical simulations. The extracted quadrupole patterns for U-[(2)H/(13)C/(15)N]-alanine indicate that the methyl deuterium undergoes classic, three-site jumping in the fast motion regime (10(-8)-10(-12)s) and the methine deuterium has a rigid deuterium powder pattern. For U-[(2)H/(13)C/(15)N]-phenylalanine, indirectly detected deuterium line shapes illustrate that the aromatic ring undergoes 180° flips in the fast motion regime while (2)Hβ and (2)Hα are completely rigid. The experimental deuterium line shapes for U-[(2)H/(13)C/(15)N]-proline reflect that (2)Hβ, (2)Hγ and (2)Hδ are subjected to fast, two-site reorientations at an angle of (15±5)°, (30±5)° and (25±10)° respectively. In addition, an approach that combines a composite inversion pulse with (2)H-(13)C CP-MAS is applied to measure (2)H spin-lattice relaxation times in a site-specific, (13)C-detected fashion.
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Affiliation(s)
- Xiangyan Shi
- Department of Chemistry and Biochemistry, Magnetic Resonance Research Center, Arizona State University, Tempe, AZ 85287-1604, United States
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10
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Reif B. Deuterated peptides and proteins: structure and dynamics studies by MAS solid-state NMR. Methods Mol Biol 2012; 831:279-301. [PMID: 22167680 DOI: 10.1007/978-1-61779-480-3_16] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Perdeuteration and back substitution of exchangeable protons in microcrystalline proteins, in combination with recrystallization from D(2)O-containing buffers, significantly reduce (1)H, (1)H dipolar interactions. This way, amide proton line widths on the order of 20 Hz are obtained. Aliphatic protons are accessible either via specifically protonated precursors or by using low amounts of H(2)O in the bacterial growth medium. The labeling scheme enables characterization of structure and dynamics in the solid-state without dipolar truncation artifacts.
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Affiliation(s)
- Bernd Reif
- Munich Center for Integrated Protein Science (CIPSM) at Department Chemie, Technische Universität München, Garching, Germany.
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11
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Kins CF, Dudenko D, Sebastiani D, Brunklaus G. Molecular Mechanisms of Additive Fortification in Model Epoxy Resins: A Solid State NMR Study. Macromolecules 2010. [DOI: 10.1021/ma101374m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christoph F. Kins
- Max-Planck-Institut für Polymerforschung, Postfach 31 48, D-55021 Mainz, Germany
| | - Dmytro Dudenko
- Max-Planck-Institut für Polymerforschung, Postfach 31 48, D-55021 Mainz, Germany
- Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | | | - Gunther Brunklaus
- Max-Planck-Institut für Polymerforschung, Postfach 31 48, D-55021 Mainz, Germany
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12
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O'Dell LA, Ratcliffe CI. Ultra-wideline 14N NMR spectroscopy as a probe of molecular dynamics. Chem Commun (Camb) 2010; 46:6774-6. [DOI: 10.1039/c0cc01902j] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Griffin JM, Miller AJ, Berry AJ, Wimperis S, Ashbrook SE. Dynamics on the microsecond timescale in hydrous silicates studied by solid-state 2H NMR spectroscopy. Phys Chem Chem Phys 2010; 12:2989-98. [DOI: 10.1039/b924666e] [Citation(s) in RCA: 29] [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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14
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Paluch P, Potrzebowski MJ. Combined solid state NMR and ONIOM studies of reversible crystalline phase reaction for nickel coordination compounds. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2009; 36:103-109. [PMID: 19682868 DOI: 10.1016/j.ssnmr.2009.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 07/03/2009] [Accepted: 07/26/2009] [Indexed: 05/28/2023]
Abstract
Ni(II) with bis(acetylacetone)ethylenediamine ligand forms complexes which crystallizes as semi-hydrate with C2/c space group in monoclinic system and anhydrous form with Pna2(1) space group in orthorhombic system. (13)C and (15)N CP/MAS experiments were employed for structural characterization of both forms and searching of process of reversible water exchange in the crystal lattice. Comparative analysis of (13)C and (15)N principal elements of chemical shift tensors for ligand and complexes showed the sensitivity of delta(ii) elements both for complexation and phase reaction processes. Theoretical (13)C and (15)N NMR shielding parameters sigma(ii) were computed employing ONIOM approach and correlated with experimental delta(ii) data. The applicability of ONIOM in structural analysis of coordination compounds (CC) is discussed.
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Affiliation(s)
- Piotr Paluch
- Polish Academy of Sciences, Centre of Molecular and Macromolecular Studies, Sienkiewicza 112, Łódź, Poland
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15
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Hogg NH, Boulton PJ, Zorin VE, Harris RK, Hodgkinson P. Use of rotary echoes in 2H magic-angle spinning NMR for the quantitative study of molecular dynamics. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.05.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Brunklaus G, Schauff S, Markova D, Klapper M, Müllen K, Spiess HW. Proton Mobilities in Phosphonic Acid-Based Proton Exchange Membranes Probed by 1H and 2H Solid-State NMR Spectroscopy. J Phys Chem B 2009; 113:6674-81. [DOI: 10.1021/jp901714f] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gunther Brunklaus
- Max-Planck-Institut für Polymerforschung, Postfach 3148, D-55021 Mainz, Germany
| | - Siri Schauff
- Max-Planck-Institut für Polymerforschung, Postfach 3148, D-55021 Mainz, Germany
| | - Dilyana Markova
- Max-Planck-Institut für Polymerforschung, Postfach 3148, D-55021 Mainz, Germany
| | - Markus Klapper
- Max-Planck-Institut für Polymerforschung, Postfach 3148, D-55021 Mainz, Germany
| | - Klaus Müllen
- Max-Planck-Institut für Polymerforschung, Postfach 3148, D-55021 Mainz, Germany
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17
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Moon C, Brunklaus G, Sebastiani D, Rudzevich Y, Böhmer V, Spiess HW. Solid-state NMR and computational studies of tetratolyl urea calix[4]arene inclusion compounds. Phys Chem Chem Phys 2009; 11:9241-9. [DOI: 10.1039/b822535d] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Hirschinger J. Analytical solutions to several magic-angle spinning NMR experiments. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2008; 34:210-223. [PMID: 19026524 DOI: 10.1016/j.ssnmr.2008.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 10/03/2008] [Accepted: 10/06/2008] [Indexed: 05/27/2023]
Abstract
Using the Anderson-Weiss (AW) formalism, analytical expressions of the NMR signal are obtained for the following magic-angle spinning (MAS) experiments: total suppression of sidebands (TOSS); phase adjusted spinning sidebands (PASS); rotational-echo double-resonance (REDOR); rotor-encoded REDOR (REREDOR); cross-polarization magic-angle spinning (CPMAS); exchange induced sidebands (EIS); one-dimensional exchange spectroscopy by sideband alternation (ODESSA); time-reverse ODESSA (trODESSA); centerband-only detection of exchange (CODEX). In order to test the validity of the AW approach, the Gaussian powder approximation is compared with exact powder calculations. A quantitative study of the effect of molecular dynamics on the efficiency of the TOSS and REDOR pulse sequences is then presented.
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Affiliation(s)
- Jérôme Hirschinger
- Institut de Chimie, UMR 7177 CNRS, Université Louis Pasteur, BP 296, 67008 Strasbourg Cedex, France.
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19
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deAzevedo ER, Saalwachter K, Pascui O, de Souza AA, Bonagamba TJ, Reichert D. Intermediate motions as studied by solid-state separated local field NMR experiments. J Chem Phys 2008; 128:104505. [DOI: 10.1063/1.2831798] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Mizuno M, Suzuki Y, Endo K, Murakami M, Tansho M, Shimizu T. Molecular Dynamics in Paramagnetic Materials as Studied by Magic-Angle Spinning 2H NMR Spectra. J Phys Chem A 2007; 111:12954-60. [DOI: 10.1021/jp075405l] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Motohiro Mizuno
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan, and National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan
| | - You Suzuki
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan, and National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan
| | - Kazunaka Endo
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan, and National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan
| | - Miwa Murakami
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan, and National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan
| | - Masataka Tansho
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan, and National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan
| | - Tadashi Shimizu
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan, and National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan
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Defreese JL, Hwang SJ, Parra-Vasquez ANG, Katz A. Molecular Motion of Tethered Molecules in Bulk and Surface-Functionalized Materials: A Comparative Study of Confinement. J Am Chem Soc 2006; 128:5687-94. [PMID: 16637635 DOI: 10.1021/ja0556474] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Achieving high degrees of molecular confinement in materials is a difficult synthetic challenge that is critical for understanding supramolecular chemistry on solid surfaces and control of host-guest complexation for selective adsorption and heterogeneous catalysis. In this Article, using 2H MAS NMR spectroscopy of tethered carbamates as a molecular probe, we systematically investigate the degree of steric confinement within three types of materials: two-dimensional silica surface, bulk amorphous microporous silica, and bulk amorphous mesoporous silica. The resulting NMR spectra are described with a simple two-site hopping model for motion and prove that the bulk silica network severely limits the molecular mobility of the immobilized carbamate at room temperature to the same degree as surface-functionalized materials at low-temperatures (approximately 210 K). Raising the temperature of the bulk materials to 413 K still demonstrates the effect of confinement, as manifested in significantly longer characteristic times for the immobilized carbamate relative to surface-functionalized materials at room temperature. The environment surrounding the carbonyl functionality of the immobilized carbamate is investigated using FT-IR spectroscopy, which shows the carbonyl stretching band to be equally shifted for all materials to lower wavenumbers relative to its noninteracting value in carbon tetrachloride solvent. These results suggest that electrostatic interactions between the carbonyl of the immobilized carbamate and silica surface may play an important role in confining the immobilized carbamate and nucleating the formation of a pore wall close to the immobilized carbamate during bulk materials synthesis.
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Affiliation(s)
- Jessica L Defreese
- Department of Chemical Engineering, University of California, Berkeley, Berkeley, California 94720-1462, USA
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Huang Y, Vold RL, Hoatson GL. Investigation of multiaxis molecular motion by off-magic angle spinning deuteron NMR. J Chem Phys 2006; 124:104504. [PMID: 16542085 DOI: 10.1063/1.2162544] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The relatively new deuteron NMR method of off-axis-magic angle spinning (OMAS) has been extended and used to investigate multiaxis rotational jump motion. Floquet theory is developed for simulating deuteron OMAS spectra with multisite jumps at different rates about noncoincident axes, and efficient procedures are presented for computing the sideband line shapes. It is demonstrated experimentally that reproducible adjustment of the angle between the rotor axis and the static magnetic field is feasible with precision approaching +/- 0.01 degrees. This leads to the reintroduction of a scaled, first-order quadrupole coupling that defines a new kinetic window and makes deuteron OMAS much more sensitive than ordinary magic angle spinning to motion on the kilohertz time scale. Temperature-dependent deuteron OMAS line shapes of octanoic acid/urea-d4 inclusion compound have been recorded and fitted, using least-squares procedures, to provide rates of rotation about both CN and CO bonds. The Arrhenius activation parameters for rotation about CN bonds, Ea = 60.4+/-2.4 kJ/mol and ln(A) = 24.9+/-0.3, agree well with previous values determined by selective inversion experiments. However, OMAS yields Ea = 26.3+/-0.4 kJ/mole and ln(A) = 24.9+/-0.3 for whole-body rotation about the CO bond axis in contrast to previous analysis of static quadrupole echo (QE) line shapes which gave Ea = 22.3+/-0.3 kJ/mole and ln(A) = 24.8+/-0.6 for the same sample. The underlying homogeneous linewidths of OMAS spectra are much smaller than those of QE spectra, and this provides higher precision and less systematic error in the determination of rates.
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Affiliation(s)
- Yuanyuan Huang
- Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795, USA
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Lorieau J, McDermott AE. Order parameters based on (13)C(1)H, (13)C(1)H(2) and (13)C(1)H(3) heteronuclear dipolar powder patterns: a comparison of MAS-based solid-state NMR sequences. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2006; 44:334-47. [PMID: 16477680 DOI: 10.1002/mrc.1773] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Order parameters describing conformational exchange processes on the nanosecond to microsecond timescale can be obtained from powder patterns in solid-state NMR (SSNMR) experiments. Extensions of these experiments to magic-angle spinning (MAS) based high-resolution experiments have been demonstrated, which show a great promise for site-specific probes of biopolymers. In this study, we present a detailed comparison of two pulse sequences, transverse Manfield-Rhim-Elleman-Vaughn (T-MREV) and Lee-Goldburg cross-polarization (LGCP), using experimental and simulation tools to explore their utility in the study of order parameters. We discuss systematic errors due to passively coupled (13)C or (1)H nuclei, as well as due to B(1) inhomogeneity. Both pulse sequences can provide quantitative measurements of the order parameter, but the LGCP experiment is capable of greater accuracy provided that the B(1) field is highly homogeneous. The T-MREV experiment is far better compensated for B(1) inhomogeneity, and it also performs better in situations with limited signal.
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Affiliation(s)
- Justin Lorieau
- Department of Chemistry, 3000 Broadway Avenue, Columbia University, New York, NY 10027, USA
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24
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Hologne M, Chen Z, Reif B. Characterization of dynamic processes using deuterium in uniformly 2H,13C,15N enriched peptides by MAS solid-state NMR. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2006; 179:20-8. [PMID: 16289962 DOI: 10.1016/j.jmr.2005.10.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2005] [Revised: 09/29/2005] [Accepted: 10/24/2005] [Indexed: 05/05/2023]
Abstract
We present in this paper 2H,13C MAS correlation experiments that are performed on a uniformly 2H,13C,15N labeled sample of Nac-Val, and on the uniformly 2H,15N labeled dipeptide Nac-Val-Leu-OH. The experiments involve the measurement of 2H T1 relaxation times at two different magnetic fields, as well as the measurement of the 2H tensor parameters by evolution of the 2H chemical shift. The data are interpreted quantitatively to differentiate between different side chain motional models.
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Affiliation(s)
- Maggy Hologne
- Forschungsinstitut für Molekulare Pharmakologie (FMP) Robert-Rössle-Str. 10 13125 Berlin, Germany
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Hologne M, Faelber K, Diehl A, Reif B. Characterization of Dynamics of Perdeuterated Proteins by MAS Solid-State NMR. J Am Chem Soc 2005; 127:11208-9. [PMID: 16089426 DOI: 10.1021/ja051830l] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We show in this communication that dynamic information for uniformly 2H,13C,15N isotopically enriched, crystalline proteins can be obtained by MAS solid-state NMR spectroscopy. The experiments make use of the deuterium quadrupolar tensor, which is the dominant interaction mechanism. Dynamic properties are accessed by measurement of the size of the quadrupolar coupling constant, Cq, and the value of the asymmetry parameter, eta, via evolution of the deuterium chemical shift, as well as by measurement of deuterium T1 relaxation times. Three-dimensional experiments are performed in order to obtain site-specific resolution. Due to proton dilution, no proton decoupling is required in the carbon evolution periods at MAS rotation frequencies of 10 kHz.
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Affiliation(s)
- Maggy Hologne
- Forschungsinstitut für Molekulare Pharmakologie (FMP), Robert-Rössle-Str. 10, 13125 Berlin, Germany
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26
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McDermott AE. Structural and dynamic studies of proteins by solid-state NMR spectroscopy: rapid movement forward. Curr Opin Struct Biol 2005; 14:554-61. [PMID: 15465315 DOI: 10.1016/j.sbi.2004.09.007] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2004] [Revised: 08/24/2004] [Accepted: 09/03/2004] [Indexed: 10/26/2022]
Abstract
Starting only a few years ago, many solid-state NMR spectroscopy laboratories have become engaged in solving the complete structures of biological macromolecules using high-resolution methods based on magic angle spinning. These efforts typically involve structurally homogeneous samples, and utilize recently developed pulse sequences for the sequential correlation of resonances, the detection of tertiary contacts and the characterization of torsion angles. Thereby, systems have been studied that evaded other, more established, structure determination methods.
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Affiliation(s)
- Ann E McDermott
- Columbia University, Department of Chemistry, MC 3113, 3000 Broadway, New York, New York 10027, USA.
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