1
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Loseva OV, Rodina TA, Ivanov MA, Bredyuk OA, Smolentsev AI, Ivanov AV. Preparation, Supramolecular Self-Organization (Construction of 2D Pseudopolymer Architecture), 13C and 15N CP/MAS NMR, and Thermal Behavior of the Double Au(III)–Hg(II) Complex [Au(S2CNBui2)2]2[Hg2Cl6]. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222060159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Li L, Maddalena L, Nishiyama Y, Carosio F, Ogawa Y, Berglund LA. Recyclable nanocomposites of well-dispersed 2D layered silicates in cellulose nanofibril (CNF) matrix. Carbohydr Polym 2022; 279:119004. [PMID: 34980351 DOI: 10.1016/j.carbpol.2021.119004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/01/2021] [Accepted: 12/07/2021] [Indexed: 11/15/2022]
Abstract
Nanocomposites based on components from nature, which can be recycled are of great interest in new materials for sustainable development. The range of properties of nacre-inspired hybrids of 1D cellulose and 2D clay platelets are investigated in nanocomposites with improved nanoparticle dispersion in the starting hydrocolloid mixture. Films with a wide range of compositions are prepared by capillary force assisted physical assembly (vacuum-assisted filtration) of TEMPO-oxidized cellulose nanofibers (TOCN) reinforced by exfoliated nanoclays of three different aspect ratios: saponite, montmorillonite and mica. X-ray diffraction and transmission electron micrographs show almost monolayer dispersion of saponite and montmorillonite and high orientation parallel to the film surface. Films exhibit ultimate strength up to 573 MPa. Young's modulus exceeds 38 GPa even at high MTM contents (40-80 vol%). Optical transmittance, UV-shielding, thermal shielding and fire-retardant properties are measured, found to be very good and are sensitive to the 2D nanoplatelet dispersion.
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Affiliation(s)
- Lengwan Li
- Department of Fiber and Polymer Technology, Wallenberg Wood Science Center, KTH Royal Institute of Technology, 10044 Stockholm, Sweden
| | - Lorenza Maddalena
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy
| | | | - Federico Carosio
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy
| | - Yu Ogawa
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
| | - Lars A Berglund
- Department of Fiber and Polymer Technology, Wallenberg Wood Science Center, KTH Royal Institute of Technology, 10044 Stockholm, Sweden.
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3
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Rodina TA, Loseva OV, Ivanov AV. DOUBLE GOLD(III)–ZINC(II) DI-ISO-BUTYLDITHIOCARBAMATO- CHLORIDO COMPLEXES OF THE COMPOSITION [Au(S2CNR2)2]2[Zn2Cl6] AND [Au(S2CNR2)2][Zn(S2CNR2)Cl2]: SYNTHESIS, STRUCTURAL ORGANIZATION, 13C CP-MAS NMR, AND THERMAL BEHAVIOR. J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621010157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Hibble SJ, Chippindale AM, Zbiri M, Rees NH, Keeble DS, Wilhelm H, d’Ambrumenil S, Seifert D. Intra- and Interchain Interactions in (Cu 1/2Au 1/2)CN, (Ag 1/2Au 1/2)CN, and (Cu 1/3Ag 1/3Au 1/3)CN and Their Effect on One-, Two-, and Three-Dimensional Order. Inorg Chem 2020; 59:11704-11714. [PMID: 32799476 PMCID: PMC7458429 DOI: 10.1021/acs.inorgchem.0c01593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Indexed: 11/28/2022]
Abstract
Mixed-metal cyanides (Cu1/2Au1/2)CN, (Ag1/2Au1/2)CN, and (Cu1/3Ag1/3Au1/3)CN adopt an AuCN-type structure in which metal-cyanide chains pack on a hexagonal lattice with metal atoms arranged in sheets. The interactions between and within the metal-cyanide chains are investigated using density functional theory (DFT) calculations, 13C solid-state NMR (SSNMR), and X-ray pair distribution function (PDF) measurements. Long-range metal and cyanide order is found within the chains: (-Cu-NC-Au-CN-)∞, (-Ag-NC-Au-CN-)∞, and (-Cu-NC-Ag-NC-Au-CN-)∞. Although Bragg diffraction studies establish that there is no long-range order between chains, X-ray PDF results show that there is local order between chains. In (Cu1/2Au1/2)CN and (Ag1/2Au1/2)CN, there is a preference for unlike metal atoms occurring as nearest neighbors within the metal sheets. A general mathematical proof shows that the maximum average number of heterometallic nearest-neighbor interactions on a hexagonal lattice with two types of metal atoms is four. Calculated energies of periodic structural models show that those with four unlike nearest neighbors are most favorable. Of these, models in space group Immm give the best fits to the X-ray PDF data out to 8 Å, providing good descriptions of the short- and medium-range structures. This result shows that interactions beyond those of nearest neighbors must be considered when determining the structures of these materials. Such interactions are also important in (Cu1/3Ag1/3Au1/3)CN, leading to the adoption of a structure in Pmm2 containing mixed Cu-Au and Ag-only sheets arranged to maximize the numbers of Cu···Au nearest- and next-nearest-neighbor interactions.
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Affiliation(s)
- Simon J. Hibble
- Chemistry
Teaching Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3PS, United Kingdom
| | - Ann M. Chippindale
- Department
of Chemistry, University of Reading, Whiteknights Campus, Reading RG6 6AD, United Kingdom
| | - Mohamed Zbiri
- Institut
Laue-Langevin (IIL), 71 avenue des Martyrs, Grenoble Cedex 9 38042, France
| | - Nicholas H. Rees
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United
Kingdom
| | - Dean S. Keeble
- Diamond
Light Source, Harwell Campus, Oxfordshire OX11 0DE, United Kingdom
| | - Heribert Wilhelm
- Diamond
Light Source, Harwell Campus, Oxfordshire OX11 0DE, United Kingdom
| | - Stella d’Ambrumenil
- Department
of Chemistry, University of Reading, Whiteknights Campus, Reading RG6 6AD, United Kingdom
- Institut
Laue-Langevin (IIL), 71 avenue des Martyrs, Grenoble Cedex 9 38042, France
| | - David Seifert
- School of
Mathematics, Statistics and Physics, Newcastle
University, Herschel Building, Newcastle upon Tyne NE1 7RU, United Kingdom
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5
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Jiang Y, Ren C, Guo H, Guo M, Li W. Speciation Transformation of Phosphorus in Poultry Litter during Pyrolysis: Insights from X-ray Diffraction, Fourier Transform Infrared, and Solid-State NMR Spectroscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:13841-13849. [PMID: 31684726 DOI: 10.1021/acs.est.9b03261] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Converting poultry litter (PL) into biochar by slow pyrolysis is a promising approach for recycling organic waste with enhanced phosphorus (P) utilization efficiency, which needs fundamental knowledge of in situ P speciation transformation for optimizing the biochar conversion conditions. In this study, solid-state NMR spectroscopy was employed to characterize solid-state P and C speciation of raw PL and PL-derived biochars prepared at various pyrolysis temperatures. The NMR analysis indicated that phytates were decomposed while hydroxyapatite (Ca10(PO4)6(OH)2) formed during conversion of PL to PL-derived biochar at a pyrolysis temperature above 300 °C. With increasing pyrolysis temperature to above 500 °C, farringtonite (Mg3(PO4)2) formed. The higher pyrolysis temperature also favored the formation of calcite and provided deeper carbonization (i.e., greater dominance of thermally stable aromatic structures) in the biochar products. Water extractable P decreased significantly from 2.9 g/kg in PL to less than 0.3 g/kg in the PL-derived biochars prepared above 300 °C, indicating the inhibition effect of pyrolysis on the P lability mainly through transformation of labile phosphates in PL into less soluble forms. Overall, this study suggested that different pyrolysis temperatures should be considered for selective conversion of PL to biochar products with distinct agricultural and environmental applications that demand special P release patterns.
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Affiliation(s)
- Yunbin Jiang
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering , Nanjing University , Nanjing , Jiangsu 210023 , China
| | - Chao Ren
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering , Nanjing University , Nanjing , Jiangsu 210023 , China
| | - Hongyan Guo
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment , Nanjing University , Nanjing , Jiangsu 210023 , China
| | - Mingxin Guo
- Department of Agriculture and Natural Resources , Delaware State University , Dover , Delaware 19901 , United States
| | - Wei Li
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering , Nanjing University , Nanjing , Jiangsu 210023 , China
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6
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Matlinska MA, Ha M, Hughton B, Oliynyk AO, Iyer AK, Bernard GM, Lambkin G, Lawrence MC, Katz MJ, Mar A, Michaelis VK. Alkaline Earth Metal-Organic Frameworks with Tailorable Ion Release: A Path for Supporting Biomineralization. ACS APPLIED MATERIALS & INTERFACES 2019; 11:32739-32745. [PMID: 31414791 DOI: 10.1021/acsami.9b11004] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An innovative application of metal-organic frameworks (MOFs) is in biomedical materials. To treat bone demineralization, which is a hallmark of osteoporosis, biocompatible MOFs (bioMOFs) have been proposed in which various components, such as alkaline-earth cations and bisphosphonate molecules, can be delivered to maintain normal bone density. Multicomponent bioMOFs that release several components simultaneously at a controlled rate thus offer an attractive solution. We report two new bioMOFs, comprising strontium and calcium ions linked by p-xylylenebisphosphonate molecules that release these three components and display no cytotoxic effects on human osteosarcoma cells. Varying the Sr2+/Ca2+ ratio in these bioMOFs causes the rate of ions dissolving into simulated body fluid to be unique; along with the ability to adsorb proteins, this property is crucial for future efforts in drug-release control and promotion of mineral formation. The one-pot synthesis of these bioMOFs demonstrates the utility of MOF design strategies.
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Affiliation(s)
- Maria A Matlinska
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Michelle Ha
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Bryden Hughton
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Anton O Oliynyk
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Abishek K Iyer
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Guy M Bernard
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Gareth Lambkin
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Mason C Lawrence
- Department of Chemistry , Memorial University of Newfoundland , St. John's , Newfoundland A1C 5S7 , Canada
| | - Michael J Katz
- Department of Chemistry , Memorial University of Newfoundland , St. John's , Newfoundland A1C 5S7 , Canada
| | - Arthur Mar
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Vladimir K Michaelis
- Department of Chemistry , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
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7
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De S, Flambard A, Garnier D, Herson P, Köhler FH, Mondal A, Costuas K, Gillon B, Lescouëzec R, Le Guennic B, Gendron F. Probing the Local Magnetic Structure of the [Fe
III
(Tp)(CN)
3
]
−
Building Block Via Solid‐State NMR Spectroscopy, Polarized Neutron Diffraction, and First‐Principle Calculations. Chemistry 2019; 25:12120-12136. [DOI: 10.1002/chem.201902239] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 06/27/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Siddhartha De
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232Sorbonne Université 4 place Jussieu 75252 Paris cedex 5 France
| | - Alexandrine Flambard
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232Sorbonne Université 4 place Jussieu 75252 Paris cedex 5 France
| | - Delphine Garnier
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232Sorbonne Université 4 place Jussieu 75252 Paris cedex 5 France
| | - Patrick Herson
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232Sorbonne Université 4 place Jussieu 75252 Paris cedex 5 France
| | - Frank H. Köhler
- Technische Universität München Lichtenbergstrasse 4 85747 Garching Germany
| | - Abhishake Mondal
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232Sorbonne Université 4 place Jussieu 75252 Paris cedex 5 France
| | - Karine Costuas
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR), UMR 6226 35000 Rennes France
| | - Béatrice Gillon
- Laboratoire Léon Brillouin, CEA and CNRS, UMR 12Centre d'Etudes de Saclay 91191 Gif-sur-Yvette France
| | - Rodrigue Lescouëzec
- Institut Parisien de Chimie Moléculaire, CNRS UMR 8232Sorbonne Université 4 place Jussieu 75252 Paris cedex 5 France
| | - Boris Le Guennic
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR), UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR), UMR 6226 35000 Rennes France
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8
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Formation Features of Hybrid Nanocomposites Based on Polydiphenylamine-2-Carboxylic Acid and Single-Walled Carbon Nanotubes. Polymers (Basel) 2019; 11:polym11071181. [PMID: 31337093 PMCID: PMC6680690 DOI: 10.3390/polym11071181] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/09/2019] [Accepted: 07/10/2019] [Indexed: 11/17/2022] Open
Abstract
Hybrid nanocomposites based on electroactive polydiphenylamine-2-carboxylic acid (PDPAC) and single-walled carbon nanotubes (SWCNTs) were obtained for the first time. Polymer-carbon nanomaterials were synthesized via in situ oxidative polymerization of diphenylamine-2-carboxylic acid (DPAC) in the presence of SWCNTs by two different ways. Hybrid SWCNT/PDPAC nanocomposites were prepared both in an acidic medium and in the heterophase system in an alkaline medium. In the heterophase system, the monomer and the SWCNTs are in the organic phase (chloroform) and the oxidant (ammonium persulfate) is in an aqueous solution of ammonium hydroxide. The chemical structure, as well as the electrical and thermal properties of the developed SWCNT/PDPAC nanocomposite materials were investigated.
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9
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Yuan Y, Shu J, Kolman K, Kiersnowski A, Bubeck C, Zhang J, Hansen MR. Multiple Chain Packing and Phase Composition in Regioregular Poly(3-butylthiophene) Films. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01828] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yuan Yuan
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
| | - Jie Shu
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
- Analysis and Testing Center, Suzhou University, Renai Road 199, 215123 Suzhou, China
| | - Krzysztof Kolman
- Faculty of Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
- Division of Applied Chemistry, Department of Chemistry and Chemical
Engineering, Chalmers University of Technology, SE 412 96 Gothenburg, Sweden
| | - Adam Kiersnowski
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
- Faculty of Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Christoph Bubeck
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
| | - Jianming Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
| | - Michael Ryan Hansen
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
- Institute of Physical Chemistry, Westfälische Wilhelms-Universität Münster, Münster, Germany
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10
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Gantman MG, Tarkhanova IG, Kolyagin YG. Non-innocent ligands in copper complexes catalyzed oxidation of thiols. J Sulphur Chem 2016. [DOI: 10.1080/17415993.2016.1193179] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Mikhail G. Gantman
- Chemical Department, M.V. Lomonosov Moscow State University, Moscow, Russia
- Institute of Chemical Engineering, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | | | - Yuri G. Kolyagin
- Chemical Department, M.V. Lomonosov Moscow State University, Moscow, Russia
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11
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Deshmukh YS, Wilsens CHRM, Verhoef R, Hansen MR, Dudenko D, Graf R, Klop EA, Rastogi S. Conformational and Structural Changes with Increasing Methylene Segment Length in Aromatic–Aliphatic Polyamides. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b01747] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yogesh. S. Deshmukh
- Bio-Based
Materials, Faculty of Humanities and Sciences, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
- Dutch Polymer
Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Carolus H. R. M. Wilsens
- Bio-Based
Materials, Faculty of Humanities and Sciences, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
- Dutch Polymer
Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - René Verhoef
- Teijin Aramid Research
Institute, P.O. Box 5153, Arnhem, The Netherlands
| | - Michael Ryan Hansen
- Dutch Polymer
Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
- Max Plank Institute
for Polymer Science, Ackermannweg 10, D-55128 Mainz, Germany
- Institute
of Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstr. 28/30, D-48149 Münster, Germany
| | - Dmytro Dudenko
- Max Plank Institute
for Polymer Science, Ackermannweg 10, D-55128 Mainz, Germany
- Department
of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Robert Graf
- Dutch Polymer
Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
- Max Plank Institute
for Polymer Science, Ackermannweg 10, D-55128 Mainz, Germany
| | - Enno A. Klop
- Teijin Aramid Research
Institute, P.O. Box 5153, Arnhem, The Netherlands
| | - Sanjay Rastogi
- Bio-Based
Materials, Faculty of Humanities and Sciences, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
- Dutch Polymer
Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
- Teijin Aramid Research
Institute, P.O. Box 5153, Arnhem, The Netherlands
- Department
of Materials, Loughborough University, Loughborough LE11 3TU, U.K
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12
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Ibrahim B, Lucier BE, Xu J, He P, Huang Y. Investigating adsorption of organic compounds in metal-organic framework MIL-53. CAN J CHEM 2015. [DOI: 10.1139/cjc-2014-0598] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Metal-organic frameworks (MOFs) are versatile materials that incorporate metal centers along with organic linkers in highly ordered, intricate structures. MIL-53 is a MOF that exhibits a “breathing effect,” where the pore size and MOF topology are profoundly influenced by the identity and binding mechanism of guest molecules. This phenomenon renders MIL-53 a promising candidate for sensing applications. In this report, the adsorption of various organic compounds within MIL-53 is investigated using a combination of complementary techniques. Thermal gravimetric analysis experiments confirm loading of the guest molecules and yield insight into adsorption interactions and strengths. Significant guest-induced changes in the crystal structure of MIL-53 are revealed by powder X-ray diffraction experiments; specific unique phases of MIL-53 are related to the identity of the guest molecule and its binding mechanism to the framework. 27Al and 13C solid-state NMR experiments probe the interaction between guest molecules and MIL-53. The relationship between the nature of the guest, the structure of MIL-53, and 27Al NMR parameters is explored. 27Al NMR parameters are sensitive to the host-guest binding mechanism (i.e., hydrogen-bonding or π–π stacking interactions) and yield valuable information regarding the influence of the adsorbates on the local aluminum environment. This combination of physical characterization techniques is a useful probe of guest adsorption and the breathing effect within MIL-53 and should prove useful for investigation of related MOFs.
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Affiliation(s)
- Balsam Ibrahim
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Bryan E.G. Lucier
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Jun Xu
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Peng He
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Yining Huang
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
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13
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Solid-state NMR analysis of the β-strand orientation of the protofibrils of amyloid β-protein. Biochem Biophys Res Commun 2012; 428:458-62. [DOI: 10.1016/j.bbrc.2012.10.096] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Accepted: 10/10/2012] [Indexed: 11/19/2022]
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14
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Harris RK, Becker ED, Cabral De Menezes SM, Granger P, Hoffman RE, Zilm KW. Further conventions for NMR shielding and chemical shifts IUPAC recommendations 2008. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2008; 33:41-56. [PMID: 18353619 DOI: 10.1016/j.ssnmr.2008.02.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Indexed: 05/26/2023]
Abstract
IUPAC has published a number of recommendations regarding the reporting of nuclear magnetic resonance (NMR) data, especially chemical shifts. The most recent publication [Pure Appl. Chem. 73, 1795 (2001)] recommended that tetramethylsilane (TMS) serve as a universal reference for reporting the shifts of all nuclides, but it deferred recommendations for several aspects of this subject. This document first examines the extent to which the (1)H shielding in TMS itself is subject to change by variation in temperature, concentration, and solvent. On the basis of recently published results, it has been established that the shielding of TMS in solution [along with that of sodium-3-(trimethylsilyl)propanesulfonate, DSS, often used as a reference for aqueous solutions] varies only slightly with temperature but is subject to solvent perturbations of a few tenths of a part per million (ppm). Recommendations are given for reporting chemical shifts under most routine experimental conditions and for quantifying effects of temperature and solvent variation, including the use of magnetic susceptibility corrections and of magic-angle spinning (MAS). This document provides the first IUPAC recommendations for referencing and reporting chemical shifts in solids, based on high-resolution MAS studies. Procedures are given for relating (13)C NMR chemical shifts in solids to the scales used for high-resolution studies in the liquid phase. The notation and terminology used for describing chemical shift and shielding tensors in solids are reviewed in some detail, and recommendations are given for best practice.
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Affiliation(s)
- Robin K Harris
- Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, UK.
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15
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Harris RK, Becker ED, Cabral de Menezes SM, Granger P, Hoffman RE, Zilm KW. Further conventions for NMR shielding and chemical shifts (IUPAC Recommendations 2008). PURE APPL CHEM 2008. [DOI: 10.1351/pac200880010059] [Citation(s) in RCA: 423] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
IUPAC has published a number of recommendations regarding the reporting of nuclear magnetic resonance (NMR) data, especially chemical shifts. The most recent publication [Pure Appl. Chem.73, 1795 (2001)] recommended that tetramethylsilane (TMS) serve as a universal reference for reporting the shifts of all nuclides, but it deferred recommendations for several aspects of this subject. This document first examines the extent to which the 1H shielding in TMS itself is subject to change by variation in temperature, concentration, and solvent. On the basis of recently published results, it has been established that the shielding of TMS in solution [along with that of sodium-3-(trimethylsilyl)propanesulfonate, DSS, often used as a reference for aqueous solutions] varies only slightly with temperature but is subject to solvent perturbations of a few tenths of a parts per million (ppm). Recommendations are given for reporting chemical shifts under most routine experimental conditions and for quantifying effects of temperature and solvent variation, including the use of magnetic susceptibility corrections and of magic-angle spinning (MAS). This document provides the first IUPAC recommendations for referencing and reporting chemical shifts in solids, based on high-resolution MAS studies. Procedures are given for relating 13C NMR chemical shifts in solids to the scales used for high-resolution studies in the liquid phase. The notation and terminology used for describing chemical shift and shielding tensors in solids is reviewed in some detail, and recommendations are given for best practice.
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Affiliation(s)
- Robin K. Harris
- 1Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, UK
| | - Edwin D. Becker
- 2National Institutes of Health, Bethesda, MD 20892-0520, USA
| | - Sonia M. Cabral de Menezes
- 3PETROBRAS/CENPES/QM, Av. Horacio Macedo 950, Cidade Universitária, 21941-598, Rio de Janeiro, R.J., Brazil
| | - Pierre Granger
- 4Institute of Chemistry, University Louis Pasteur, Strasbourg, 1 rue Blaise Pascal, 67008 Strasbourg, Cedex, France
| | - Roy E. Hoffman
- 5Department of Organic Chemistry, The Hebrew University of Jerusalem, Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Kurt W. Zilm
- 6Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT 06520-8107, USA
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Ivanov AV, Bredyuk OA, Gerasimenko AV, Lutsenko IA, Antzutkin ON, Forsling W. Structures of polynuclear thallium(I) and copper(II)-thallium(I) complexes with dialkyldithiocarbamates: 13C and 15N CP/MAS NMR, EPR, and X-ray diffraction studies. RUSS J COORD CHEM+ 2006. [DOI: 10.1134/s107032840605006x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Siemer AB, Ritter C, Steinmetz MO, Ernst M, Riek R, Meier BH. 13C, 15N resonance assignment of parts of the HET-s prion protein in its amyloid form. JOURNAL OF BIOMOLECULAR NMR 2006; 34:75-87. [PMID: 16518695 DOI: 10.1007/s10858-005-5582-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2005] [Accepted: 11/18/2005] [Indexed: 05/07/2023]
Abstract
The partial 15N and 13C solid-state NMR resonance assignment of the HET-s prion protein fragment 218-289 in its amyloid form is presented. It is based on experiments measured at MAS frequencies in the range of 20-40 kHz using exclusively adiabatic polarization-transfer schemes. The resonance assignment within each residue is based on two-dimensional 13C-13C correlation spectra utilizing the DREAM mixing scheme. The sequential linking of the assigned residues used a set of two- and three-dimensional 15N-13C correlation experiments. Almost all cross peaks visible in the spectra are assigned, but only resonances from 43 of the 78 amino-acid residues could be detected. The missing residues are thought to be highly disordered and/or highly dynamic giving rise to broad resonance lines that escaped detection in the experiments applied. The line widths of the observed resonances are narrow and comparable to line widths observed in micro-crystalline samples. The 43 assigned residues are located in two fragments of about 20 residues.
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Affiliation(s)
- Ansgar B Siemer
- Physical Chemistry, ETH Zurich, CH-8093, Zurich, Switzerland
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Abstract
This review article describes the applications of NMR to the study of polymorphs and related forms (solvates) of organic (especially pharmaceutical) compounds, for which it is of increasing academic and practical importance. The nature of the systems covered is briefly introduced, as are the techniques constituting solid-state NMR. The methodologies involved are then reviewed under a number of different headings, ranging from spectral editing through relaxation times to shielding tensors and NMR crystallography. In each case the relevant applications are described. Whilst most studies concentrate on structural matters, motional effects are not neglected. A special section discusses studies of solvates (especially hydrates), and another reviews quantitative analysis.
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Affiliation(s)
- Robin K Harris
- Department of Chemistry, University of Durham, South Road, Durham, UK DH1 3LE.
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Denecker C, Liggat JJ, Snape CE. Relationship between the thermal degradation chemistry and flammability of commercial flexible polyurethane foams. J Appl Polym Sci 2006. [DOI: 10.1002/app.23701] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Structural Organization of Nickel(II), Zinc(II), and Copper(II) Complexes with Diisobutyldithiocarbamate: EPR, 13C and 15N CP/MAS NMR, and X-Ray Diffraction Studies. RUSS J COORD CHEM+ 2005. [DOI: 10.1007/s11173-005-0157-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Sander LC, Lippa KA, Wise SA. Order and disorder in alkyl stationary phases. Anal Bioanal Chem 2005; 382:646-68. [PMID: 15827723 DOI: 10.1007/s00216-005-3127-2] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2004] [Revised: 01/21/2005] [Accepted: 01/24/2005] [Indexed: 11/28/2022]
Abstract
Covalently modified surfaces represent a unique state of matter that is not well described by liquid or solid phase models. The chemical bond in tethered alkanes imparts order to the surface in the form of anisotropic properties that are evident in chromatographic and spectroscopic studies. An understanding of the structure, conformation, and organization of alkyl-modified surfaces is requisite to the design of improved materials and the optimal utilization of existing materials. In recent years, the study of alkyl-modified surfaces has benefited from advances in modern analytical instrumentation. Aspects of alkyl chain conformation and motion have been investigated through the use of nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, fluorescence spectroscopy, and neutron scattering studies. Chromatography provides complementary evidence of alkyl chain organization through interactions with solute probes. Computational simulations offer insights into the structure of covalently modified surfaces that may not be apparent through empirical observation. This manuscript reviews progress achieved in the study of the architecture of alkyl-modified surfaces.
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Affiliation(s)
- Lane C Sander
- Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899-8392, USA.
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22
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Solid‐State Structure, Quantum Calculations and Spectroscopic Characterization of the Hydrogen‐Bonded Complex [Os(bpy)
2
(CO)(EtO···H‐DMAP)][PF
6
]
2. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200400631] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Buston JEH, Claridge TDW, Heyes SJ, Leech MA, Moloney MG, Prout K, Stevenson M. Structural investigations of a lead(iv) tetraacetate–pyridine complex. Dalton Trans 2005:3195-203. [PMID: 16172645 DOI: 10.1039/b506366c] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 1 : 1 crystalline complex of lead(IV) tetraacetate and pyridine (LTA-py) has been prepared. The single-crystal X-ray structure, at 296 and 150 K, establishes the presence of a relatively short Pb-N bond (2.307 A) within an intriguing seven-coordinate lead inner sphere consisting of the pyridine ligand and two bidentate and two monodentate acetate ligands. The pyridine occupies a surprising amount of the available coordination space and has induced a dramatic change in coordination compared to the four chelating acetate ligands found in lead tetraacetate (LTA). Thermal measurements (TGA/DSC) indicate the de-coordination of pyridine and its loss from the solid between 360 and 380 K. (207)Pb CP/MAS NMR spectroscopy also demonstrates the existence of the Pb-N bond through observation of (1)J((207)Pb,(14)N)= 63 Hz and a (207)Pb-(14)N dipolar coupling constant, of 149 Hz. The solid-state (207)Pb NMR parameters are used to give insight into the coordination environment of Pb(iv) in LTA-py. In solution, ligand exchange is rapid on chemical shift and J-coupling time scales. A (207)Pb NMR study of the titration of an LTA solution by pyridine yields a stability constant for LTA-py of K = 1.5 M(-1) and predicts it to have a (207)Pb NMR chemical shift essentially identical to that observed by CP/MAS NMR in the solid state. This correlation between the solid state and solution indicates that the seven-coordinate LTA-py structure found in the crystalline state does persist in solution, and this could further explain why the addition of pyridine has such profound effects on lead(IV) carboxylate-mediated organic reactions. Simulations of exchange-broadened line shapes of (13)C CP/MAS NMR spectra in the temperature regime above 280 K indicate local motion of the pyridine rings in the form of 180 degrees jumps (activation energy 72.5 kJ mol(-1)); these are first such ring flips reported for a coordinated pyridine ligand.
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Affiliation(s)
- Jonathan E H Buston
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA, UK
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Bourbigot S, Bras ML, Leeuwendal R, Shen KK, Schubert D. Recent advances in the use of zinc borates in flame retardancy of EVA. Polym Degrad Stab 1999. [DOI: 10.1016/s0141-3910(98)00130-x] [Citation(s) in RCA: 168] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bugajny M, Bourbigot S, Le Bras M, Delobel R. The origin and nature of flame retardance in ethylene-vinyl acetate copolymers containing hostaflam AP 750. POLYM INT 1999. [DOI: 10.1002/(sici)1097-0126(199904)48:4<264::aid-pi118>3.0.co;2-m] [Citation(s) in RCA: 177] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Alaimo MH, Roberts JE. Effects of paramagnetic cations on the nonexponential spin-lattice relaxation of rare spin nuclei in solids. SOLID STATE NUCLEAR MAGNETIC RESONANCE 1997; 8:241-250. [PMID: 9373904 DOI: 10.1016/s0926-2040(97)00006-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Nonexponential spin-lattice relaxation is often observed for rare spin nuclei in the solid state. Deviation from single-component decay may be amplified by the coupling of rare spin nuclei to paramagnetic centers. Nonexponential spin-lattice relaxation was observed in derivatized silica gels resins. This phenomenon was localized and enhanced when paramagnetic transition metal cations were bound to surface functional groups. A stretched exponential analysis method was determined to be robust in fitting nonexponential relaxation curves for silica gels both with and without bound paramagnetic ions. Spin-lattice relaxation rates (T1(-1)) for functional group nuclei increased as a function of percent surface coverage with metal ion. The magnitude of the relaxation rate increase was dependent upon internuclear distances from the paramagnetic center. At low surface coverages, a semi-random distribution of paramagnetic centers increased the degree of stretching of spin-lattice relaxation decays, as measured by decreases in the calculated stretching parameter beta. At higher surface coverages, calculated beta values reached a limiting value, indicating that while the spin-diffusion mechanism in metal-exchanged silica gels is restricted, it is not completely diminished.
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Affiliation(s)
- M H Alaimo
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA
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Augustine MP, Zilm KW, Zax DB. Field dependent isotropic shifts in solid state nuclear magnetic resonance: A Floquet treatment. J Chem Phys 1993. [DOI: 10.1063/1.464375] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hayashi S, Hayamizu K. Effect of spinning on chemical shifts in magic‐angle‐spinning nuclear magnetic resonance. J Chem Phys 1990. [DOI: 10.1063/1.457928] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cholli AL, Thakur M. Structural investigation of a nonconjugated conducting polymer by solid state13C nuclear magnetic resonance spectroscopy. J Chem Phys 1989. [DOI: 10.1063/1.457207] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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VanderHart DL. Field‐dependent C‐13 chemical shifts in solids: A second‐order dipolar perturbation. J Chem Phys 1986. [DOI: 10.1063/1.450511] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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