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Mudgil M, Kurur ND. Extracting Scalar Couplings From Complex 1H NMR Spectra Using a Simple 2D J-Resolved Sequence. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2024. [PMID: 39294923 DOI: 10.1002/mrc.5480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 08/23/2024] [Accepted: 08/26/2024] [Indexed: 09/21/2024]
Abstract
Measurement of scalar couplings between protons is a very challenging task because of complex multiplet patterns and severe overlapping of these multiplets in congested 1D spectra. Numerous 2D J-resolved sequences now exist that utilize either the Zangger-Sterk or PSYCHE or z-filter elements along with selective refocusing and pure-shift schemes to generate high-resolution phase-sensitive spectra with simple doublets inF 1 $$ {F}_1 $$ dimension. Herein, we present a 2D J-resolved sequence that employs a simple element consisting of hard pulses and inter-pulse delays to generate phase-sensitive spectra. This simple element in combination with selective refocusing eliminates all the undesired components including the intense axial peaks, thus provides clean 2D J-resolved spectra with signals of only two targeted protons with simple doublets inF 1 $$ {F}_1 $$ dimension and full multiplets of target protons inF 2 $$ {F}_2 $$ dimension. This high selectivity thus obviates the need for extra filtering elements and pure-shift acquisition schemes that are integrated into existing sequences to facilitate coupling measurements in overcrowded signals. It is therefore anticipated that this sequence, with the ease of implementation and ability to extract coupling values from highly congested spectra, should turn out an important tool for structural and conformational analyses in chemical and biological studies.
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Affiliation(s)
- Manjeet Mudgil
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi, India
| | - Narayanan D Kurur
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi, India
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2
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Nakai T. Perturbation Approach for NMR Signals with Infinite-Order Corrections and Its Application to Solid-State MAS INADEQUATE Spectra Exhibiting Auto-Correlation Peaks due to Chemically-Equivalent Spin Pairs: Analogy to Renormalization Theory. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Toshihito Nakai
- JEOL RESONANCE Inc., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan
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3
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Gericke R, Gondek C, Stapf A, Wagler J, Kroke E, Brendler E. Convenient two step synthesis of 29Si labelled tetraalkoxysilanes. Chem Commun (Camb) 2020; 56:13631-13633. [DOI: 10.1039/d0cc05525e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Starting from silicon dioxide or silicon a scalable, reliable synthesis of 29Si enriched tetraethoxysilane, an essential sol–gel precursor, is presented.
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Affiliation(s)
- Robert Gericke
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Christoph Gondek
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - André Stapf
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Jörg Wagler
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Edwin Kroke
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Inorganic Chemistry
- 09599 Freiberg
- Germany
| | - Erica Brendler
- Technische Universität Bergakademie Freiberg
- Department of Chemistry and Physics
- Institute of Analytical Chemistry
- 09599 Freiberg
- Germany
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4
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Zhang W, Yoon MK, Meredith RJ, Zajicek J, Oliver AG, Hadad M, Frey MH, Carmichael I, Serianni AS. 13C- 13C spin-coupling constants in crystalline 13C-labeled saccharides: conformational effects interrogated by solid-state 13C NMR spectroscopy. Phys Chem Chem Phys 2019; 21:23576-23588. [PMID: 31621725 DOI: 10.1039/c9cp03228b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solid-state 13C NMR spectroscopy has been used in conjunction with selectively 13C-labeled mono- and disaccharides to measure 13C-13C spin-couplings (JCC) in crystalline samples. This experimental approach allows direct correlation of JCC values with specific molecular conformations since, in crystalline samples, molecular conformation is essentially static and can be determined by X-ray crystallography. JCC values measured in the solid-state in known molecular conformations can then be compared to corresponding JCC values calculated in the same conformations using density functional theory (DFT). The latter comparisons provide important validation of DFT-calculated J-couplings, which is not easily obtained by other approaches and is fundamental to obtaining reliable experiment-based conformational models from redundant J-couplings by MA'AT analysis. In this study, representative 1JCC, 2JCCC and 3JCOCC values were studied as either intra-residue couplings in the aldohexopyranosyl rings of monosaccharides or inter-residue (trans-glycoside) couplings in disaccharides. The results demonstrate that (a) accurate JCC values can be measured in crystalline saccharides that have been suitably labeled with 13C, and (b) DFT-calculated JCC values compare favorably with those determined by solid-state 13C NMR when molecular conformation is a constant in both determinations.
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Affiliation(s)
- Wenhui Zhang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556-5670, USA.
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5
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Kobayashi T, Wang Z, Pruski M. Homonuclear dipolar recoupling of arbitrary pairs in multi-spin systems under magic angle spinning: A double-frequency-selective ZQ-SEASHORE experiment. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2019; 101:76-81. [PMID: 31129364 DOI: 10.1016/j.ssnmr.2019.05.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 05/10/2019] [Accepted: 05/13/2019] [Indexed: 06/09/2023]
Abstract
We describe a useful method for measuring the internuclear distances within arbitrarily selected pairs of like nuclei in dipolar-coupled multi-spin systems. The method uses a combination of the zero-quantum shift-evolution-assisted selective homonuclear recoupling (ZQ-SEASHORE) technique developed by Hu and Tycko [J. Chem. Phys. 2009, 131, 045101] and double-frequency-selective radio-frequency pulse. The double-frequency-selective pulse inverts polarizations of two spins simultaneously, and thus applications of the method presented here are only limited by the spectral resolution, and not by the number of interacting spins. Our experiments demonstrate the validity of the method and present analytical expressions for the dephasing curve.
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Affiliation(s)
- Takeshi Kobayashi
- U.S. DOE Ames Laboratory, Iowa State University, Ames, IA, 50011-3020, United States.
| | - Zhuoran Wang
- U.S. DOE Ames Laboratory, Iowa State University, Ames, IA, 50011-3020, United States; Department of Chemistry, Iowa State University, Ames, IA, 50011-3020, United States
| | - Marek Pruski
- U.S. DOE Ames Laboratory, Iowa State University, Ames, IA, 50011-3020, United States; Department of Chemistry, Iowa State University, Ames, IA, 50011-3020, United States.
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6
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Srivastava DJ, Florian P, Baltisberger JH, Grandinetti PJ. Correlating geminal 2JSi–O–Si couplings to structure in framework silicates. Phys Chem Chem Phys 2018; 20:562-571. [DOI: 10.1039/c7cp06486a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The dependence of a 29Si geminal J coupling across the inter-tetrahedral linkage on local structure was examined using first-principles DFT calculations.
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Affiliation(s)
| | - P. Florian
- CNRS
- UPR3079 CEMHTI
- 45071 Orléans Cedex 2
- France
| | - J. H. Baltisberger
- Division of Natural Science
- Mathematics, and Nursing
- Berea College
- Berea
- USA
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7
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Robertson AJ, Pandey MK, Marsh A, Nishiyama Y, Brown SP. The use of a selective saturation pulse to suppress t1 noise in two-dimensional (1)H fast magic angle spinning solid-state NMR spectroscopy. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2015; 260:89-97. [PMID: 26432398 DOI: 10.1016/j.jmr.2015.09.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 09/01/2015] [Accepted: 09/07/2015] [Indexed: 06/05/2023]
Abstract
A selective saturation pulse at fast magic angle spinning (MAS) frequencies (60+kHz) suppresses t1 noise in the indirect dimension of two-dimensional (1)H MAS NMR spectra. The method is applied to a synthetic nucleoside with an intense methyl (1)H signal due to triisopropylsilyl (TIPS) protecting groups. Enhanced performance in terms of suppressing the methyl signal while minimising the loss of signal intensity of nearby resonances of interest relies on reducing spin diffusion--this is quantified by comparing two-dimensional (1)H NOESY-like spin diffusion spectra recorded at 30-70 kHz MAS. For a saturation pulse centred at the methyl resonance, the effect of changing the nutation frequency at different MAS frequencies as well as the effect of changing the pulse duration is investigated. By applying a pulse of duration 30 ms and nutation frequency 725 Hz at 70 kHz MAS, a good compromise of significant suppression of the methyl resonance combined with the signal intensity of resonances greater than 5 ppm away from the methyl resonance being largely unaffected is achieved. The effectiveness of using a selective saturation pulse is demonstrated for both homonuclear (1)H-(1)H double quantum (DQ)/single quantum (SQ) MAS and (14)N-(1)H heteronuclear multiple quantum coherence (HMQC) two-dimensional solid-state NMR experiments.
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Affiliation(s)
- Aiden J Robertson
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom; Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Manoj Kumar Pandey
- RIKEN CLST-JEOL Collaboration Centre, Yokohama, Kanagawa 230-0045, Japan
| | - Andrew Marsh
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Yusuke Nishiyama
- RIKEN CLST-JEOL Collaboration Centre, Yokohama, Kanagawa 230-0045, Japan; JEOL RESONANCE Inc., Musashino, Akishima, Tokyo 196-8558, Japan
| | - Steven P Brown
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
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8
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Pitoux D, Hu Z, Plainchont B, Merlet D, Farjon J, Bonnaffé D, Giraud N. Magnetic field dependence of spatial frequency encoding NMR as probed on an oligosaccharide. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2015; 53:836-844. [PMID: 26264777 DOI: 10.1002/mrc.4281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 05/06/2015] [Accepted: 05/20/2015] [Indexed: 06/04/2023]
Abstract
The magnetic field dependence of spatial frequency encoding NMR techniques is addressed through a detailed analysis of (1)H NMR spectra acquired under spatial frequency encoding on an oligomeric saccharide sample. In particular, the influence of the strength of the static magnetic field on spectral and spatial resolutions that are key features of this method is investigated. For this purpose, we report the acquisition of correlation experiments implementing broadband homodecoupling or J-edited spin evolutions, and we discuss the resolution enhancements that are provided by these techniques at two different magnetic fields. We show that performing these experiments at higher field improves the performance of high resolution NMR techniques based on a spatial frequency encoding. The significant resolution enhancements observed on the correlation spectra acquired at very high field make them valuable analytical tools that are suitable for the assignment of (1)H chemical shifts and scalar couplings in molecules with highly crowded spectrum such as carbohydrates.
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Affiliation(s)
- D Pitoux
- Equipe de RMN en milieu orienté, ICMMO, UMR 8182 (CNRS-UPS), Université Paris-Sud, Orsay cedex, 91405, France
| | - Z Hu
- Equipe Méthodologies, Synthèses et Molécules Thérapeutiques, ICMMO, UMR 8182 (CNRS-UPS), LabEx LERMIT, Université Paris-Sud, Orsay Cedex, 91405, France
- Unité de Chimie des Biomolécules, Institut Pasteur, UMR CNRS 3523, Paris cedex, 75724, France
| | - B Plainchont
- Equipe de RMN en milieu orienté, ICMMO, UMR 8182 (CNRS-UPS), Université Paris-Sud, Orsay cedex, 91405, France
| | - D Merlet
- Equipe de RMN en milieu orienté, ICMMO, UMR 8182 (CNRS-UPS), Université Paris-Sud, Orsay cedex, 91405, France
| | - J Farjon
- Equipe de RMN en milieu orienté, ICMMO, UMR 8182 (CNRS-UPS), Université Paris-Sud, Orsay cedex, 91405, France
| | - D Bonnaffé
- Equipe Méthodologies, Synthèses et Molécules Thérapeutiques, ICMMO, UMR 8182 (CNRS-UPS), LabEx LERMIT, Université Paris-Sud, Orsay Cedex, 91405, France
| | - N Giraud
- Equipe de RMN en milieu orienté, ICMMO, UMR 8182 (CNRS-UPS), Université Paris-Sud, Orsay cedex, 91405, France
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9
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Kakita VMR, Kupče E, Bharatam J. Solid-state Hadamard NMR spectroscopy: simultaneous measurements of multiple selective homonuclear scalar couplings. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2015; 251:8-12. [PMID: 25554944 DOI: 10.1016/j.jmr.2014.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 11/10/2014] [Accepted: 11/16/2014] [Indexed: 06/04/2023]
Abstract
Unambiguous measurement of homonuclear scalar couplings (J) in multi-spin scalar network systems is not straightforward. Further, the direct measurement of J-couplings is obscured in solid-state samples due to the dipolar and chemical shift anisotropy (CSA)-dominated line broadening, even under the magic angle spinning (MAS). We present a new multiple frequency selective spin-echo method based on Hadamard matrix encoding, for simultaneous measurement of multiple homonuclear scalar couplings (J) in the solid-state. In contrast to the Hadamard encoded selective excitation schemes known for the solution-state, herein the selectivity is achieved during refocusing period. The Hadamard encoded refocusing scheme concurrently allows to create the spin-spin commutation property between number of spin-pairs of choice in uniformly labelled molecules, which, therefore avoids (1) the repetition of the double selective refocusing experiments for each spin-pair and (2) the synthesis of expensive selective labelled molecules. The experimental scheme is exemplified for determining (1)JCC and (3)JCC values in (13)C6l-Histidine.HCl molecule, which are found to be in excellent agreement with those measured in conventional double frequency selective refocusing mode as well as in the solution-state. This method can be simply extended to 2D/3D pulse schemes and be applied to small bio-molecular solids.
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Affiliation(s)
- Veera Mohana Rao Kakita
- Centre for NMR & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Eriks Kupče
- Bruker UK Limited, Banner Lane, Coventry CV4 9GH, UK
| | - Jagadeesh Bharatam
- Centre for NMR & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
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10
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Lee D, Monin G, Duong NT, Lopez IZ, Bardet M, Mareau V, Gonon L, De Paëpe G. Untangling the Condensation Network of Organosiloxanes on Nanoparticles using 2D 29Si–29Si Solid-State NMR Enhanced by Dynamic Nuclear Polarization. J Am Chem Soc 2014; 136:13781-8. [DOI: 10.1021/ja506688m] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Daniel Lee
- Univ. Grenoble Alpes, INAC, F-38000 Grenoble, France
- CEA, INAC, SCIB, F-38000 Grenoble, France
| | - Guillaume Monin
- Univ. Grenoble Alpes, INAC, F-38000 Grenoble, France
- CEA, INAC, SPRAM, F-38000 Grenoble, France
- CNRS, SPRAM, F-38000 Grenoble, France
| | - Nghia Tuan Duong
- Univ. Grenoble Alpes, INAC, F-38000 Grenoble, France
- CEA, INAC, SCIB, F-38000 Grenoble, France
| | - Isabel Zamanillo Lopez
- Univ. Grenoble Alpes, INAC, F-38000 Grenoble, France
- CEA, INAC, SPRAM, F-38000 Grenoble, France
- CNRS, SPRAM, F-38000 Grenoble, France
| | - Michel Bardet
- Univ. Grenoble Alpes, INAC, F-38000 Grenoble, France
- CEA, INAC, SCIB, F-38000 Grenoble, France
| | - Vincent Mareau
- Univ. Grenoble Alpes, INAC, F-38000 Grenoble, France
- CEA, INAC, SPRAM, F-38000 Grenoble, France
- CNRS, SPRAM, F-38000 Grenoble, France
| | - Laurent Gonon
- Univ. Grenoble Alpes, INAC, F-38000 Grenoble, France
- CEA, INAC, SPRAM, F-38000 Grenoble, France
- CNRS, SPRAM, F-38000 Grenoble, France
| | - Gaël De Paëpe
- Univ. Grenoble Alpes, INAC, F-38000 Grenoble, France
- CEA, INAC, SCIB, F-38000 Grenoble, France
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11
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Mithu VS, Tan KO, Madhu PK. Selective inversion of 1H resonances in solid-state nuclear magnetic resonance: Use of double-DANTE pulse sequence. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2013; 237:11-16. [PMID: 24121475 DOI: 10.1016/j.jmr.2013.09.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 09/07/2013] [Accepted: 09/16/2013] [Indexed: 06/02/2023]
Abstract
We here present a method based on DANTE pulses and homonuclear dipolar decoupling scheme to invert selectively any desired resonance in a proton spin system under magic-angle spinning. Experimental results are reported on a sample of L-histidine·HCl·H2O at magic-angle spinning frequencies of 15 and 60kHz. The results are also substantiated numerically.
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Affiliation(s)
- Venus Singh Mithu
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
| | - Kong Ooi Tan
- Department of Physical Chemistry, ETH Zurich, CH-8093 Zurich, Switzerland
| | - P K Madhu
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India; TIFR Centre for Interdisciplinary Sciences, 21 Brundavan Colony, Narsinghi, Hyderabad 500 075, India.
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12
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Thureau P, Mollica G, Ziarelli F, Viel S. Selective measurements of long-range homonuclear J-couplings in solid-state NMR. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2013; 231:90-94. [PMID: 23608042 DOI: 10.1016/j.jmr.2013.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 03/17/2013] [Accepted: 03/23/2013] [Indexed: 06/02/2023]
Abstract
We demonstrate here that the principle of frequency-selective spin-echoes can be extended to the measurements of long-range homonuclear scalar J-couplings in the solid-state. Singly or doubly frequency-selective pulses were used to generate either a J-modulated experiment (S) or a reference experiment (S0). The combination of these two distinct experiments provides experimental data that, in favorable cases, are insensitive to incoherent relaxation effects, and which can be used to estimate long-range homonuclear J-couplings in multiple spin-systems. The concept is illustrated in the case of a uniformly (13)C and (15)N labeled sample of L-histidine, where the absolute value of homonuclear J-couplings between two spins separated by one, two or three covalent bonds are measured. Moreover, we show that a (2)J((15)N-C-(15)N) coupling as small as 0.9 Hz can be precisely measured with the method presented here.
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Affiliation(s)
- Pierre Thureau
- Aix-Marseille Univ., CNRS, UMR 7273: Institut de Chimie Radicalaire, 13397 Marseille, France.
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13
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Brouwer DH, Cadars S, Eckert J, Liu Z, Terasaki O, Chmelka BF. A general protocol for determining the structures of molecularly ordered but noncrystalline silicate frameworks. J Am Chem Soc 2013; 135:5641-55. [PMID: 23560776 DOI: 10.1021/ja311649m] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A general protocol is demonstrated for determining the structures of molecularly ordered but noncrystalline solids, which combines constraints provided by X-ray diffraction (XRD), one- and two-dimensional solid-state nuclear magnetic resonance (NMR) spectroscopy, and first-principles quantum chemical calculations. The approach is used to determine the structure(s) of a surfactant-directed layered silicate with short-range order in two dimensions but without long-range periodicity in three-dimensions (3D). The absence of long-range 3D molecular order and corresponding indexable XRD reflections precludes determination of a space group for this layered silicate. Nevertheless, by combining structural constraints obtained from solid-state (29)Si NMR analyses, including the types and relative populations of distinct (29)Si sites, their respective (29)Si-O-(29)Si connectivities and separation distances, with unit cell parameters (though not space group symmetry) provided by XRD, a comprehensive search of candidate framework structures leads to the identification of a small number of candidate structures that are each compatible with all of the experimental data. Subsequent refinement of the candidate structures using density functional theory calculations allows their evaluation and identification of "best" framework representations, based on their respective lattice energies and quantitative comparisons between experimental and calculated (29)Si isotropic chemical shifts and (2)J((29)Si-O-(29)Si) scalar couplings. The comprehensive analysis identifies three closely related and topologically equivalent framework configurations that are in close agreement with all experimental and theoretical structural constraints. The subtle differences among such similar structural models embody the complexity of the actual framework(s), which likely contain coexisting or subtle distributions of structural order that are intrinsic to the material.
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Affiliation(s)
- Darren H Brouwer
- Department of Chemistry, Redeemer University College, Ancaster, Ontario, Canada, L9K 1J4
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14
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Becker-Baldus J, Kemp TF, Past J, Reinhold A, Samoson A, Brown SP. Longer-range distances by spinning-angle-encoding solid-state NMR spectroscopy. Phys Chem Chem Phys 2011; 13:4514-8. [DOI: 10.1039/c0cp02364g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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15
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Koller H, Weiss M. Solid state NMR of porous materials : zeolites and related materials. Top Curr Chem (Cham) 2011; 306:189-227. [PMID: 21452082 DOI: 10.1007/128_2011_123] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Solid state NMR spectroscopy applied to the science of crystalline micro- and mesoporous silica materials over the past 10 years is reviewed. A survey is provided of framework structure and connectivity analyses from chemical shift effects of various elements in zeolites including heteroatom substitutions, framework defects and pentacoordinated silicon for zeolites containing fluoride ions. New developments in the field of NMR crystallography are included. Spatial host-guest ordering and confinement effects of zeolite-sorbate complexes are outlined, with special emphasis on NMR applications utilizing the heteronuclear dipolar interaction. The characterization of zeolite acid sites and in situ NMR on catalytic conversions is also included. Finally, the motion of extra-framework cations is investigated in two tutorial cases of sodium hopping in sodalite and cancrinite.
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Affiliation(s)
- Hubert Koller
- Institute of Physical Chemistry, University of Münster, Corrensstr. 28/30, 48149, Münster, Germany.
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16
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Bonhomme C, Gervais C, Coelho C, Pourpoint F, Azaïs T, Bonhomme-Coury L, Babonneau F, Jacob G, Ferrari M, Canet D, Yates JR, Pickard CJ, Joyce SA, Mauri F, Massiot D. New perspectives in the PAW/GIPAW approach: J(P-O-Si) coupling constants, antisymmetric parts of shift tensors and NQR predictions. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2010; 48 Suppl 1:S86-S102. [PMID: 20589728 DOI: 10.1002/mrc.2635] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In 2001, Pickard and Mauri implemented the gauge including projected augmented wave (GIPAW) protocol for first-principles calculations of NMR parameters using periodic boundary conditions (chemical shift anisotropy and electric field gradient tensors). In this paper, three potentially interesting perspectives in connection with PAW/GIPAW in solid-state NMR and pure nuclear quadrupole resonance (NQR) are presented: (i) the calculation of J coupling tensors in inorganic solids; (ii) the calculation of the antisymmetric part of chemical shift tensors and (iii) the prediction of (14)N and (35)Cl pure NQR resonances including dynamics. We believe that these topics should open new insights in the combination of GIPAW, NMR/NQR crystallography, temperature effects and dynamics. Points (i), (ii) and (iii) will be illustrated by selected examples: (i) chemical shift tensors and heteronuclear (2)J(P-O-Si) coupling constants in the case of silicophosphates and calcium phosphates [Si(5)O(PO(4))(6), SiP(2)O(7) polymorphs and α-Ca(PO(3))(2)]; (ii) antisymmetric chemical shift tensors in cyclopropene derivatives, C(3)X(4) (X = H, Cl, F) and (iii) (14)N and (35)Cl NQR predictions in the case of RDX (C(3)H(6)N(6)O(6)), β-HMX (C(4)H(8)N(8)O(8)), α-NTO (C(2)H(2)N(4)O(3)) and AlOPCl(6). RDX, β-HMX and α-NTO are explosive compounds.
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Affiliation(s)
- Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée, Université Pierre et Marie Curie, Paris 06, CNRS UMR 7574, Collège de France, 75005 Paris, France.
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17
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Griffin JM, Yates JR, Berry AJ, Wimperis S, Ashbrook SE. High-Resolution 19F MAS NMR Spectroscopy: Structural Disorder and Unusual J Couplings in a Fluorinated Hydroxy-Silicate. J Am Chem Soc 2010; 132:15651-60. [DOI: 10.1021/ja105347q] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- John M. Griffin
- School of Chemistry and EaStCHEM, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K., Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K., Department of Earth Sciences and Engineering, Imperial College London, South Kensington SW7 2AZ, U.K., Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, U.K., and School of Chemistry and WestCHEM, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Jonathan R. Yates
- School of Chemistry and EaStCHEM, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K., Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K., Department of Earth Sciences and Engineering, Imperial College London, South Kensington SW7 2AZ, U.K., Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, U.K., and School of Chemistry and WestCHEM, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Andrew J. Berry
- School of Chemistry and EaStCHEM, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K., Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K., Department of Earth Sciences and Engineering, Imperial College London, South Kensington SW7 2AZ, U.K., Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, U.K., and School of Chemistry and WestCHEM, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Stephen Wimperis
- School of Chemistry and EaStCHEM, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K., Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K., Department of Earth Sciences and Engineering, Imperial College London, South Kensington SW7 2AZ, U.K., Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, U.K., and School of Chemistry and WestCHEM, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Sharon E. Ashbrook
- School of Chemistry and EaStCHEM, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K., Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K., Department of Earth Sciences and Engineering, Imperial College London, South Kensington SW7 2AZ, U.K., Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, U.K., and School of Chemistry and WestCHEM, University of Glasgow, Glasgow G12 8QQ, U.K
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Pedone A, Biczysko M, Barone V. Environmental effects in computational spectroscopy: accuracy and interpretation. Chemphyschem 2010; 11:1812-32. [PMID: 20358575 DOI: 10.1002/cphc.200900976] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Spectroscopic techniques are valuable tools for understanding the structure and dynamics of complex systems, such as biomolecules or nanomaterials. Most of the current research is devoted to the development of new experimental techniques for improving the intrinsic resolution of different spectra. However, the subtle interplay of several different effects acting at different length and time scales still makes the interpretation and analysis of such spectra a very difficult task. In this respect, computational spectroscopy is becoming a needful and versatile tool for the assignment and interpretation of experimental spectra. It is in fact possible nowadays to model with relatively high accuracy the physical-chemical properties of complex molecules in different environments, and to link spectroscopic evidence directly to the structural and dynamical properties of optically or magnetically active solvated probes. In this Review, significant steps toward the simulation of entire spectra in condensed phases are presented together with some basic aspects of computational spectroscopy, which highlight how intramolecular and intermolecular degrees of freedom influence several spectroscopic parameters.
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Affiliation(s)
- Alfonso Pedone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, Pisa, Italy
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Xue X. Determination of J coupling constants between spin-1/2 and quadrupolar nuclei in inorganic solids from spin echo and refocused INEPT experiments: a case study on AlPO₄ berlinite. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2010; 38:62-73. [PMID: 21030218 DOI: 10.1016/j.ssnmr.2010.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Revised: 08/02/2010] [Accepted: 09/14/2010] [Indexed: 05/30/2023]
Abstract
A systematic study utilizing rotor-synchronized homonuclear ((31)P, (27)Al) and heteronuclear ({(31)P}(27)Al and {(27)Al}(31)P) spin echo, and {(27)Al}(31)P refocused INEPT experiments (employing soft pulses for selective excitation of the central transition for the quadrupolar (27)Al (I=5/2)) have been performed on AlPO(4) berlinite at 30 kHz MAS to better understand the J modulation behavior involving half-integer quadrupolar nuclei in solid materials with framework structure. Analyses of the J modulation on either the (27)Al or (31)P coherence in both the {(31)P}(27)Al and {(27)Al}(31)P spin echo experiments, and both periods of the refocused INEPT experiment yield consistent results for the (2)J(AlP) (Al-O-P) coupling constant (ca. 25 Hz). It is noted that the coupling of each (27)Al to four (31)P spins during the first ((27)Al) evolution period of the refocused INEPT, and the populations of (31)P coupled to different numbers (0-4) of (27)Al in the ± 1/2 Zeeman states during (31)P coherence evolution, which have been neglected in previous studies, must be taken into account for proper treatment. Analysis of J modulation on the spin ((27)Al) coupled to spin-1/2 nuclei in general gives more accurate results. Weak long-range homonuclear (4)J(PP) (P-O-Al-O-P) coupling was also observed from the (31)P spin echo and INADEQUATE experiments.
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Affiliation(s)
- Xianyu Xue
- Institute for Study of the Earth's Interior, Okayama University, Yamada 827, Misasa, Tottori 682-0193, Japan.
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20
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Spano J, Wi S. Dipolar-coupling-mediated total correlation spectroscopy in solid-state 13C NMR: selection of individual 13C-13C dipolar interactions. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2010; 204:314-326. [PMID: 20392659 DOI: 10.1016/j.jmr.2010.03.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2009] [Revised: 03/10/2010] [Accepted: 03/18/2010] [Indexed: 05/29/2023]
Abstract
Herein is described a useful approach in solid-state NMR, for selecting homonuclear (13)C-(13)C spin pairs in a multiple-(13)C homonuclear dipolar coupled spin system. This method builds upon the zero-quantum (ZQ) dipolar recoupling method introduced by Levitt and coworkers (Marin-Montesinos et al., 2006) by extending the originally introduced one-dimensional (1D) experiment into a two-dimensional (2D) method with selective irradiation scheme, while moving the (13)C-(13)C mixing scheme from the transverse to the longitudinal mode, together with a dramatic improvement in the proton decoupling efficiency. Selective spin-pair recoupling experiments incorporating Gaussian and cosine-modulated Gaussian pulses for inverting specific spins were performed, demonstrating the ability to detect informative, simplified/individualized, long-range (13)C-(13)C homonuclear dipolar coupling interactions more accurately by removing less informative, stronger, short-range (13)C-(13)C interactions from 2D correlation spectra. The capability of this new approach was demonstrated experimentally on uniformly (13)C-labeled Glutamine and a tripeptide sample, GAL.
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Affiliation(s)
- Justin Spano
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA
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21
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Giraud N, Béguin L, Courtieu J, Merlet D. Nuclear Magnetic Resonance Using a Spatial Frequency Encoding: Application to J-Edited Spectroscopy along the Sample. Angew Chem Int Ed Engl 2010; 49:3481-4. [DOI: 10.1002/anie.200907103] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Giraud N, Béguin L, Courtieu J, Merlet D. Nuclear Magnetic Resonance Using a Spatial Frequency Encoding: Application toJ-Edited Spectroscopy along the Sample. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907103] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Babonneau F, Baccile N, Laurent G, Maquet J, Azaïs T, Gervais C, Bonhomme C. Solid-state nuclear magnetic resonance: A valuable tool to explore organic-inorganic interfaces in silica-based hybrid materials. CR CHIM 2010. [DOI: 10.1016/j.crci.2009.08.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Pauvert O, Fayon F, Rakhmatullin A, Krämer S, Horvatić M, Avignant D, Berthier C, Deschamps M, Massiot D, Bessada C. 91Zr Nuclear Magnetic Resonance Spectroscopy of Solid Zirconium Halides at High Magnetic Field. Inorg Chem 2009; 48:8709-17. [DOI: 10.1021/ic9007119] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- O. Pauvert
- CEMHTI, CNRS UPR 3079, 1D avenue de la recherche scientifique, 45071 Orléans cedex 2, France
- Université d’Orléans, Faculté des Sciences, avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - F. Fayon
- CEMHTI, CNRS UPR 3079, 1D avenue de la recherche scientifique, 45071 Orléans cedex 2, France
- Université d’Orléans, Faculté des Sciences, avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - A. Rakhmatullin
- CEMHTI, CNRS UPR 3079, 1D avenue de la recherche scientifique, 45071 Orléans cedex 2, France
- Université d’Orléans, Faculté des Sciences, avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - S. Krämer
- Laboratoire National des Champs Magnétiques Intenses (LNCMI), CNRS UPR 3228, BP 166, 25 rue des Martyrs, 38042 Grenoble cedex 9, France
| | - M. Horvatić
- Laboratoire National des Champs Magnétiques Intenses (LNCMI), CNRS UPR 3228, BP 166, 25 rue des Martyrs, 38042 Grenoble cedex 9, France
| | - D. Avignant
- Laboratoire des Matériaux Inorganiques, CNRS UMR 6002, Université Blaise Pascal, 24 avenue des Landais, 63177, Aubière cedex, France
| | - C. Berthier
- Laboratoire National des Champs Magnétiques Intenses (LNCMI), CNRS UPR 3228, BP 166, 25 rue des Martyrs, 38042 Grenoble cedex 9, France
| | - M. Deschamps
- CEMHTI, CNRS UPR 3079, 1D avenue de la recherche scientifique, 45071 Orléans cedex 2, France
- Université d’Orléans, Faculté des Sciences, avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - D. Massiot
- CEMHTI, CNRS UPR 3079, 1D avenue de la recherche scientifique, 45071 Orléans cedex 2, France
- Université d’Orléans, Faculté des Sciences, avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
| | - C. Bessada
- CEMHTI, CNRS UPR 3079, 1D avenue de la recherche scientifique, 45071 Orléans cedex 2, France
- Université d’Orléans, Faculté des Sciences, avenue du Parc Floral, BP 6749, 45067 Orléans cedex 2, France
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25
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Alonso B, Massiot D, Florian P, Paradies HH, Gaveau P, Mineva T. 14N and 81Br Quadrupolar Nuclei as Sensitive NMR Probes of n-Alkyltrimethylammonium Bromide Crystal Structures. An Experimental and Theoretical Study. J Phys Chem B 2009; 113:11906-20. [DOI: 10.1021/jp9027904] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bruno Alonso
- Institut Charles Gerhardt de Montpellier, Matériaux Avancés pour la Catalyse et la Santé, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM2-UM1, 8 rue de l’Ecole Normale, 34296 Montpellier cedex 5, France, CEMHTI, CNRS UPR3079 Université d’Orléans, 1D av. de la Recherche Scientifique, 45071 Orléans cedex 2, France, and The University of Salford, Joule Physics Laboratory, School of Computing, Science and Engineering, Materials Research Institute, Manchester, M 5 4WT, United Kingdom
| | - Dominique Massiot
- Institut Charles Gerhardt de Montpellier, Matériaux Avancés pour la Catalyse et la Santé, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM2-UM1, 8 rue de l’Ecole Normale, 34296 Montpellier cedex 5, France, CEMHTI, CNRS UPR3079 Université d’Orléans, 1D av. de la Recherche Scientifique, 45071 Orléans cedex 2, France, and The University of Salford, Joule Physics Laboratory, School of Computing, Science and Engineering, Materials Research Institute, Manchester, M 5 4WT, United Kingdom
| | - Pierre Florian
- Institut Charles Gerhardt de Montpellier, Matériaux Avancés pour la Catalyse et la Santé, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM2-UM1, 8 rue de l’Ecole Normale, 34296 Montpellier cedex 5, France, CEMHTI, CNRS UPR3079 Université d’Orléans, 1D av. de la Recherche Scientifique, 45071 Orléans cedex 2, France, and The University of Salford, Joule Physics Laboratory, School of Computing, Science and Engineering, Materials Research Institute, Manchester, M 5 4WT, United Kingdom
| | - Henrich H. Paradies
- Institut Charles Gerhardt de Montpellier, Matériaux Avancés pour la Catalyse et la Santé, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM2-UM1, 8 rue de l’Ecole Normale, 34296 Montpellier cedex 5, France, CEMHTI, CNRS UPR3079 Université d’Orléans, 1D av. de la Recherche Scientifique, 45071 Orléans cedex 2, France, and The University of Salford, Joule Physics Laboratory, School of Computing, Science and Engineering, Materials Research Institute, Manchester, M 5 4WT, United Kingdom
| | - Philippe Gaveau
- Institut Charles Gerhardt de Montpellier, Matériaux Avancés pour la Catalyse et la Santé, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM2-UM1, 8 rue de l’Ecole Normale, 34296 Montpellier cedex 5, France, CEMHTI, CNRS UPR3079 Université d’Orléans, 1D av. de la Recherche Scientifique, 45071 Orléans cedex 2, France, and The University of Salford, Joule Physics Laboratory, School of Computing, Science and Engineering, Materials Research Institute, Manchester, M 5 4WT, United Kingdom
| | - Tzonka Mineva
- Institut Charles Gerhardt de Montpellier, Matériaux Avancés pour la Catalyse et la Santé, ICGM-MACS, UMR 5253 CNRS-ENSCM-UM2-UM1, 8 rue de l’Ecole Normale, 34296 Montpellier cedex 5, France, CEMHTI, CNRS UPR3079 Université d’Orléans, 1D av. de la Recherche Scientifique, 45071 Orléans cedex 2, France, and The University of Salford, Joule Physics Laboratory, School of Computing, Science and Engineering, Materials Research Institute, Manchester, M 5 4WT, United Kingdom
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26
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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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27
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Beguin L, Giraud N, Ouvrard JM, Courtieu J, Merlet D. Improvements to selective refocusing phased (SERFph) experiments. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2009; 199:41-47. [PMID: 19398358 DOI: 10.1016/j.jmr.2009.03.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Revised: 03/17/2009] [Accepted: 03/28/2009] [Indexed: 05/27/2023]
Abstract
Selective refocusing experiments are very powerful for extracting proton-proton couplings one by one. However we demonstrate in the present work that various spectral artefacts are produced by the initial sequence and we show that the combined addition of a refocusing pi pulse and a zero-quantum filter greatly improves the experimental sensitivity, and moreover leads to observation of pure absorption lineshapes in the resulting phased 2D spectrum. These developments are applied to the differentiation of enantiomers dissolved in a chiral liquid crystal.
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Affiliation(s)
- L Beguin
- Laboratoire de RMN en milieu orienté, Université Paris-Sud 11, ICMMO, UMR CNRS 8182, Bat. 410, 91405 Orsay cedex, France
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28
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Brown SP. Recent Advances in Solid-State MAS NMR Methodology for Probing Structure and Dynamics in Polymeric and Supramolecular Systems. Macromol Rapid Commun 2009; 30:688-716. [DOI: 10.1002/marc.200800816] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Accepted: 02/06/2009] [Indexed: 01/12/2023]
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29
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Hiet J, Deschamps M, Pellerin N, Fayon F, Massiot D. Probing chemical disorder in glasses using silicon-29 NMR spectral editing. Phys Chem Chem Phys 2009; 11:6935-40. [DOI: 10.1039/b906399d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Cadars S, Brouwer DH, Chmelka BF. Probing local structures of siliceous zeolite frameworks by solid-state NMR and first-principles calculations of 29Si–O–29Si scalar couplings. Phys Chem Chem Phys 2009; 11:1825-37. [DOI: 10.1039/b815361b] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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31
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Joyce SA, Yates JR, Pickard CJ, Brown SP. Density Functional Theory Calculations of Hydrogen-Bond-Mediated NMR J Coupling in the Solid State. J Am Chem Soc 2008; 130:12663-70. [DOI: 10.1021/ja800419m] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Siân A. Joyce
- Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., and Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Jonathan R. Yates
- Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., and Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Chris J. Pickard
- Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., and Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Steven P. Brown
- Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland, TCM Group, Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 OHE, U.K., School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, U.K., and Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
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32
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Wiench JW, Lin VSY, Pruski M. 29Si NMR in solid state with CPMG acquisition under MAS. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2008; 193:233-42. [PMID: 18538601 DOI: 10.1016/j.jmr.2008.05.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Revised: 05/08/2008] [Accepted: 05/11/2008] [Indexed: 05/18/2023]
Abstract
A remarkable enhancement of sensitivity can be often achieved in 29Si solid-state NMR by applying the well-known Carr-Purcell-Meiboom-Gill (CPMG) train of rotor-synchronized pi pulses during the detection of silicon magnetization. Here, several one- and two-dimensional (1D and 2D) techniques are used to demonstrate the capabilities of this approach. Examples include 1D 29Si{X} CPMAS spectra and 2D 29Si{X} HETCOR spectra of mesoporous silicas, zeolites and minerals, where X=1H or 27Al. Data processing methods, experimental strategies and sensitivity limits are discussed and illustrated by experiments. The mechanisms of transverse dephasing of 29Si nuclei in solids are analyzed. Fast magic angle spinning, at rates between 25 and 40 kHz, is instrumental in achieving the highest sensitivity gain in some of these experiments. In the case of 29Si-29Si double-quantum techniques, CPMG detection can be exploited to measure homonuclear J-couplings.
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Affiliation(s)
- J W Wiench
- U.S. DOE Ames Laboratory, Iowa State University, Ames, IA 50011, USA
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Estimation of internuclear couplings in the solid-state NMR of multiple-spin systems. Selective spin echoes and off-magic-angle sample spinning. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.03.021] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Griffin JM, Tripon C, Samoson A, Filip C, Brown SP. Low-load rotor-synchronised Hahn-echo pulse train (RS-HEPT) 1H decoupling in solid-state NMR: factors affecting MAS spin-echo dephasing times. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2007; 45 Suppl 1:S198-S208. [PMID: 18098353 DOI: 10.1002/mrc.2145] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Transverse dephasing times T(2)' in spin-echo MAS NMR using rotor-synchronised Hahn-echo pulse-train (RS-HEPT) low-load (1)H decoupling are evaluated. Experiments were performed at 300 and 600 MHz for (13)CH-labelled L-alanine and (15)NH(delta)-labelled L-histidine.HCl.H(2)O, together with SPINEVOLUTION simulations for a ten-spin system representing the crystal structure environment of the (13)CH carbon in L-alanine. For 30 kHz MAS and nu(1)((1)H) = 100 kHz at 300 MHz, a RS-HEPT T(2)' value of 17 +/- 1 ms was obtained for (13)CH-labelled L-alanine which is approximately 50% of the XiX T(2)' value of 33 +/- 2 ms. Optimum RS-HEPT decoupling performance is observed for a relative phase of alternate RS-HEPT pi-pulses, Deltaphi = phi'- phi, between 40 and 60 degrees . For experiments at 600 MHz and 30 kHz MAS with (13)CH-labelled L-alanine, the best RS-HEPT (nu(1)((1)H) = 100 kHz) T(2)' value was 3 times longer than that observed for low-power continuously applied sequences with nu(1)((1)H) < or =40 kHz, i.e. corresponding to the same average power dissipated in the probe. A marked improvement in RS-HEPT (1)H decoupling is observed for increasing MAS frequency: at 55.6 kHz MAS, a best RS-HEPT T(2)' value of 34 +/- 5 ms was recorded for (13)CH-labelled L-alanine. Much improved RS-HEPT broadband performance was also observed at 55.6 kHz MAS as compared to 30 kHz MAS.
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Affiliation(s)
- John M Griffin
- Department of Physics, University of Warwick, Coventry, UK
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35
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Joyce SA, Yates JR, Pickard CJ, Mauri F. A first principles theory of nuclear magnetic resonance J-coupling in solid-state systems. J Chem Phys 2007; 127:204107. [DOI: 10.1063/1.2801984] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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36
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Cadars S, Sein J, Duma L, Lesage A, Pham TN, Baltisberger JH, Brown SP, Emsley L. The refocused INADEQUATE MAS NMR experiment in multiple spin-systems: interpreting observed correlation peaks and optimising lineshapes. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2007; 188:24-34. [PMID: 17588789 DOI: 10.1016/j.jmr.2007.05.016] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Accepted: 05/18/2007] [Indexed: 05/12/2023]
Abstract
The robustness of the refocused INADEQUATE MAS NMR pulse sequence for probing through-bond connectivities has been demonstrated in a large range of solid-state applications. This pulse sequence nevertheless suffers from artifacts when applied to multispin systems, e.g. uniformly labeled (13)C solids, which distort the lineshapes and can potentially result in misleading correlation peaks. In this paper, we present a detailed account that combines product-operator analysis, numerical simulations and experiments of the behavior of a three-spin system during the refocused INADEQUATE pulse sequence. The origin of undesired anti-phase contributions to the spectral lineshapes are described, and we show that they do not interfere with the observation of long-range correlations (e.g. two-bond (13)C-(13)C correlations). The suppression of undesired contributions to the refocused INADEQUATE spectra is shown to require the removal of zero-quantum coherences within a z-filter. A method is proposed to eliminate zero-quantum coherences through dephasing by heteronuclear dipolar couplings, which leads to pure in-phase spectra.
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Affiliation(s)
- Sylvian Cadars
- Laboratoire de Chimie (UMR 5182 CNRS/ENS Lyon), Ecole Normale Supérieure de Lyon, 46 allée d'Italie, 69364 Lyon Cedex 07, France
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37
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Pham TN, Griffin JM, Masiero S, Lena S, Gottarelli G, Hodgkinson P, Filip C, Brown SP. Quantifying hydrogen-bonding strength: the measurement of 2hJNN couplings in self-assembled guanosines by solid-state 15N spin-echo MAS NMR. Phys Chem Chem Phys 2007; 9:3416-23. [PMID: 17664965 DOI: 10.1039/b703513f] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(2h)J(NN) hydrogen-bond mediated J couplings are measured in the solid state for two synthetic deoxyguanosine derivatives by (15)N MAS NMR spin-echo experiments. The use of rotor-synchronised Hahn-echo pulse train (RS-HEPT) (1)H decoupling, with a duty cycle of 6%, allows spin-echo durations out to 200 ms, hence enabling the accurate determination of J couplings as small as 3.8 Hz. A single-crystal X-ray diffraction structure exists for the shorter alkyl chain derivative dG(C(3))(2): the observation of significantly different (2h)J(NN) couplings, 6.2 +/- 0.4 and 7.4 +/- 0.4 Hz, for the two resolved N7 resonances is to be expected given the NH...N hydrogen-bonding distances of 2.91 and 2.83 A for the two distinct molecules in the asymmetric unit cell. For the longer alkyl chain derivative, dG(C(10))(2), for which there is no single-crystal diffraction structure, a (15)N refocused INADEQUATE spectrum (Pham et al., J. Am. Chem. Soc., 2005, 127, 16018-16019) has demonstrated the presence of N2-H...N7 intermolecular hydrogen-bonds indicative of a quartet-like structure. The (2h)J(NN) hydrogen-bond mediated J coupling of 5.9 +/- 0.2 Hz is at the lower end of the range (5.9-8.2 Hz) of (2h)J(NN) couplings determined from solution-state NMR of guanosine quartets in quadruplex DNA. A full discussion of the determination of error bars on the fitted parameters is given; specifically, error bars determined by a non-linear fitting (using the covariance matrix) or in a Monte-Carlo fashion are found to give effectively identical results.
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Affiliation(s)
- Tran N Pham
- Department of Physics, University of Warwick, Coventry, UK CV4 7AL
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Cadars S, Lesage A, Trierweiler M, Heux L, Emsley L. NMR measurements of scalar-coupling distributions in disordered solids. Phys Chem Chem Phys 2007; 9:92-103. [PMID: 17164890 DOI: 10.1039/b611096g] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The measurement of scalar (J) couplings by solid-state NMR is a field of great interest, since this interaction is a rich source of local structural information, complementary to dipolar and chemical shift interactions. Here, we first demonstrate that J-coupling distributions exist and can be observed in disordered solids, as illustrated with the observation of a pair-specific distribution of (2)J((31)P-N-(31)P) couplings in a bis-phosphino amine, and we investigate the potential effects of such distributions on the measurement of average J-coupling constants. Second, we show that the measurement of two-dimensional (2D) distributions of J-couplings provides a much richer probe of local structural disorder than one-dimensional distributions, and we introduce new methods that provide different (selective or non-selective) ways of measuring 2D J distributions in a wide range of disordered systems. These methods are finally applied to a slightly disordered polymorphic sample of fully (13)C-enriched cellulose, and then to the bis-phosphino amine sample, from which 2D (2)J(PP)-coupling distributions are clearly identified and interpreted.
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Affiliation(s)
- Sylvian Cadars
- Laboratoire de Chimie (UMR 5182 CNRS/ENS Lyon), Ecole Normale Supérieure de Lyon, Lyon, France
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