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Corti L, Hung I, Venkatesh A, Gan Z, Claridge JB, Rosseinsky MJ, Blanc F. Cation Distribution and Anion Transport in the La 3Ga 5-xGe 1+xO 14+0.5x Langasite Structure. J Am Chem Soc 2024; 146:14022-14035. [PMID: 38717031 PMCID: PMC11117410 DOI: 10.1021/jacs.4c02324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/27/2024] [Accepted: 04/01/2024] [Indexed: 05/23/2024]
Abstract
Exploration of compositional disorder using conventional diffraction-based techniques is challenging for systems containing isoelectronic ions possessing similar coherent neutron scattering lengths. Here, we show that a multinuclear solid-state Nuclear Magnetic Resonance (NMR) approach provides compelling insight into the Ga3+/Ge4+ cation distribution and oxygen anion transport in a family of solid electrolytes with langasite structure and La3Ga5-xGe1+xO14+0.5x composition. Ultrahigh field 71Ga Magic Angle Spinning (MAS) NMR experiments acquired at 35.2 T offer striking resolution enhancement, thereby enabling clear detection of Ga sites in different coordination environments. Three-connected GaO4, four-connected GaO4 and GaO6 polyhedra are probed for the parent La3Ga5GeO14 structure, while one additional spectral feature corresponding to the key (Ga,Ge)2O8 structural unit which forms to accommodate the interstitial oxide ions is detected for the Ge4+-doped La3Ga3.5Ge2.5O14.75 phase. The complex spectral line shapes observed in the MAS NMR spectra are reproduced very accurately by the NMR parameters computed for a symmetry-adapted configurational ensemble that comprehensively models site disorder. This approach further reveals a Ga3+/Ge4+ distribution across all Ga/Ge sites that is controlled by a kinetically governed cation diffusion process. Variable temperature 17O MAS NMR experiments up to 700 °C importantly indicate that the presence of interstitial oxide ions triggers chemical exchange between all oxygen sites, thereby enabling atomic-scale understanding of the anion diffusion mechanism underpinning the transport properties of these materials.
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Affiliation(s)
- Lucia Corti
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
- Leverhulme
Research Centre for Functional Materials Design, Materials Innovation
Factory, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Ivan Hung
- National
High Magnetic Field Laboratory, Florida
State University, Tallahassee, Florida 32310, United States
| | - Amrit Venkatesh
- National
High Magnetic Field Laboratory, Florida
State University, Tallahassee, Florida 32310, United States
| | - Zhehong Gan
- National
High Magnetic Field Laboratory, Florida
State University, Tallahassee, Florida 32310, United States
| | - John B. Claridge
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
- Leverhulme
Research Centre for Functional Materials Design, Materials Innovation
Factory, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Matthew J. Rosseinsky
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
- Leverhulme
Research Centre for Functional Materials Design, Materials Innovation
Factory, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Frédéric Blanc
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
- Leverhulme
Research Centre for Functional Materials Design, Materials Innovation
Factory, University of Liverpool, Liverpool L69 7ZD, U.K.
- Stephenson
Institute for Renewable Energy, University
of Liverpool, Liverpool L69 7ZF, U.K.
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2
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Corti L, Hung I, Venkatesh A, Gor'kov PL, Gan Z, Claridge JB, Rosseinsky MJ, Blanc F. Local Structure in Disordered Melilite Revealed by Ultrahigh Field 71Ga and 139La Solid-State Nuclear Magnetic Resonance Spectroscopy. Chemphyschem 2024; 25:e202300934. [PMID: 38279668 DOI: 10.1002/cphc.202300934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/26/2024] [Accepted: 01/26/2024] [Indexed: 01/28/2024]
Abstract
Multinuclear Nuclear Magnetic Resonance (NMR) spectroscopy of quadrupolar nuclei at ultrahigh magnetic field provides compelling insight into the short-range structure in a family of fast oxide ion electrolytes with La1+xSr1-xGa3O7+0.5x melilite structure. The striking resolution enhancement in the solid-state 71Ga NMR spectra measured with the world's unique series connected hybrid magnet operating at 35.2 T distinctly resolves Ga sites in four- and five-fold coordination environments. Detection of five-coordinate Ga centers in the site-disordered La1.54Sr0.46Ga3O7.27 melilite is critical given that the GaO5 unit accommodates interstitial oxide ions and provides excellent transport properties. This work highlights the importance of ultrahigh magnetic fields for the detection of otherwise broad spectral features in systems containing quadrupolar nuclei and the potential of ensemble-based computational approaches for the interpretation of NMR data acquired for site-disordered materials.
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Affiliation(s)
- Lucia Corti
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, UK
| | - Ivan Hung
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
| | - Amrit Venkatesh
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
| | - Peter L Gor'kov
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
| | - Zhehong Gan
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
| | - John B Claridge
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, UK
| | - Matthew J Rosseinsky
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, UK
| | - Frédéric Blanc
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, UK
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool, L69 7ZF, UK
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3
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Leroy C, Métro TX, Hung I, Gan Z, Gervais C, Laurencin D. From Operando Raman Mechanochemistry to "NMR Crystallography": Understanding the Structures and Interconversion of Zn-Terephthalate Networks Using Selective 17O-Labeling. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:2292-2312. [PMID: 35281972 PMCID: PMC8908548 DOI: 10.1021/acs.chemmater.1c04132] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/31/2022] [Indexed: 06/14/2023]
Abstract
The description of the formation, structure, and reactivity of coordination networks and metal-organic frameworks (MOFs) remains a real challenge in a number of cases. This is notably true for compounds composed of Zn2+ ions and terephthalate ligands (benzene-1,4-dicarboxylate, BDC) because of the difficulties in isolating them as pure phases and/or because of the presence of structural defects. Here, using mechanochemistry in combination with operando Raman spectroscopy, the observation of the formation of various zinc terephthalate compounds was rendered possible, allowing the distinction and isolation of three intermediates during the ball-milling synthesis of Zn3(OH)4(BDC). An "NMR crystallography" approach was then used, combining solid-state NMR (1H, 13C, and 17O) and density functional theory (DFT) calculations to refine the poorly described crystallographic structures of these phases. Particularly noteworthy are the high-resolution 17O NMR analyses, which were made possible in a highly efficient and cost-effective way, thanks to the selective 17O-enrichment of either hydroxyl or terephthalate groups by ball-milling. This allowed the presence of defect sites to be identified for the first time in one of the phases, and the nature of the H-bonding network of the hydroxyls to be established in another. Lastly, the possibility of using deuterated precursors (e.g., D2O and d 4-BDC) during ball-milling is also introduced as a means for observing specific transformations during operando Raman spectroscopy studies, which would not have been possible with hydrogenated equivalents. Overall, the synthetic and spectroscopic approaches developed herein are expected to push forward the understanding of the structure and reactivity of other complex coordination networks and MOFs.
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Affiliation(s)
- César Leroy
- ICGM,
Univ Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | | | - Ivan Hung
- National
High Magnetic Laboratory (NHMFL), Tallahassee, Florida 32310-3706, United States
| | - Zhehong Gan
- National
High Magnetic Laboratory (NHMFL), Tallahassee, Florida 32310-3706, United States
| | - Christel Gervais
- Laboratoire
de Chimie de la Matière Condensée de Paris (LCMCP),
UMR 7574, Sorbonne Université, CNRS, F-75005 Paris, France
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4
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Smith ME. Recent progress in solid-state nuclear magnetic resonance of half-integer spin low-γ quadrupolar nuclei applied to inorganic materials. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:864-907. [PMID: 33207003 DOI: 10.1002/mrc.5116] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/12/2020] [Accepted: 11/13/2020] [Indexed: 06/11/2023]
Abstract
An overview is presented of recent progress in the solid-state nuclear magnetic resonance (NMR) observation of low-γ nuclei, with a focus on applications to inorganic materials. The technological and methodological advances in the last 20 years, which have underpinned the increased accessibility of low-γ nuclei for study by solid-state NMR techniques, are summarised, including improvements in hardware, pulse sequences and associated computational methods (e.g., first principles calculations and spectral simulation). Some of the key initial observations from inorganic materials of these nuclei are highlighted along with some recent (most within the last 10 years) illustrations of their application to such materials. A summary of other recent reviews of the study of low-γ nuclei by solid-state NMR is provided so that a comprehensive understanding of what has been achieved to date is available.
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Affiliation(s)
- Mark E Smith
- Vice-Chancellor and President's Office and Department of Chemistry, University of Southampton, Southampton, UK
- Department of Chemistry, Lancaster University, Bailrigg, Lancaster, UK
- Department of Physics, University of Warwick, Coventry, UK
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5
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Bai S, Quinn CM, Holmes ST, Dybowski C. High-resolution 13 C and 43 Ca solid-state NMR and computational studies of the ethylene glycol solvate of atorvastatin calcium. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2020; 58:1010-1017. [PMID: 31469449 DOI: 10.1002/mrc.4937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/19/2019] [Accepted: 08/20/2019] [Indexed: 06/10/2023]
Abstract
We report 43 Ca and 13 C solid-state nuclear magnetic resonance (NMR) spectroscopic studies of the ethylene glycol solvate of atorvastatin calcium. The 13 C and 43 Ca chemical shift and 43 Ca quadrupolar coupling tensor parameters are reported. The results are interpreted in terms of the reported X-ray diffraction crystal structure of the solvate and are compared with the NMR parameters of atorvastatin calcium trihydrate, the active pharmaceutical ingredient in Lipitor®. Hartree-Fock and density functional theory calculations of the NMR parameters based on a cluster model derived from the optimized X-ray diffraction crystal structure of the ethylene glycol solvate of atorvastatin calcium are in reasonable agreement with the experimental 43 Ca and 13 C NMR measurables.
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Affiliation(s)
- Shi Bai
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Caitlin M Quinn
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Sean T Holmes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Cecil Dybowski
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
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6
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Gervais C, Bonhomme C, Laurencin D. Recent directions in the solid-state NMR study of synthetic and natural calcium phosphates. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2020; 107:101663. [PMID: 32325374 DOI: 10.1016/j.ssnmr.2020.101663] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/29/2020] [Accepted: 04/02/2020] [Indexed: 06/11/2023]
Abstract
Materials containing a calcium phosphate component have been the subject of much interest to NMR spectroscopists, especially in view of understanding the structure and properties of mineralized tissues like bone and teeth, and of developing synthetic biomaterials for bone regeneration. Here, we present a selection of recent developments in their structural characterization using advanced solid state NMR experiments, highlighting the level of insight which can now be accessed.
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Affiliation(s)
- Christel Gervais
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR 7574, Sorbonne Université, CNRS, 75005, Paris, France
| | - Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR 7574, Sorbonne Université, CNRS, 75005, Paris, France
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