scholarly journals Nuclear magnetic resonance as an analytical tool in battery materials science

2021 ◽  
Author(s):  
Mounesha N Garaga ◽  
David Clarkson ◽  
Steve Greenbaum
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Materials Science ◽  
Analytical Tool ◽  
Battery Materials ◽  
Nuclear Magnetic

LC–NMR for Natural Product Analysis: A Journey from an Academic Curiosity to a Robust Analytical Tool

Sci ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 6
Author(s):  
Tesfay Gebretsadik ◽  
Wolfgang Linert ◽  
Madhu Thomas ◽  
Tarekegn Berhanu ◽  
Russell Frew
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Liquid Chromatography ◽  
Magnetic Resonance ◽  
Natural Product ◽  
Solid Phase ◽  
Structural Information ◽  
Analytical Tool ◽  
Molecular Formula ◽  
Product Analysis ◽  
Nuclear Magnetic

Liquid chromatography (LC)–nuclear magnetic resonance (NMR) combines the advantage of the outstanding separation power of liquid chromatography (LC) and the superior structural elucidating capability of nuclear magnetic resonance (NMR). NMR has proved that it is a standout detector for LC by providing maximum structural information about plant originated extracts, particularly on the isolating ability of isomeric (same molecular formula) and/or isobaric (same molecular weight) compounds as compared to other detectors. The present review provides an overview of the developmental trends and application of LC–NMR in natural product analysis. The different LC–NMR operational modes are described, and how technical improvements assist in establishing this powerful technique as an important analytical tool in the analysis of complex plant-derived compounds is also highlighted. On-flow, stop-flow and loop-storage modes, as well as the new offline mode LC–solid phase extraction (SPE)–NMR and capillary LC (capLC)–NMR configurations which avoid the ingestion of expensive deuterated solvents throughout the experiment, are mentioned. Utilization of cryogenic probe and microprobe technologies, which are the other important promising approaches for guaranteeing sensitivity, are also described. Concluding remarks and future outlooks are also discussed.

Nuclear Magnetic Resonance Studies of Lithium-Ion Battery Materials

MRS Bulletin ◽  
2002 ◽  
Vol 27 (8) ◽  
pp. 613-618 ◽  
Author(s):  
Clare P. Grey ◽  
Steve G. Greenbaum
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Anode Materials ◽  
Lithium Ion ◽  
Battery Materials ◽  
Gel Electrolytes ◽  
Oxide Cathodes ◽  
Oxide Spinel ◽  
Lithium Manganese Oxide Spinel ◽  
Nuclear Magnetic

AbstractSolid-state nuclear magnetic resonance (NMR) spectroscopy has been employed to characterize a variety of phenomena that are central to the functioning of lithium and lithium-ion batteries. These include Li insertion and de-insertion mechanisms in carbonaceous and other anode materials and in transition-metal oxide cathodes, and ion-transport mechanisms in polymer and gel electrolytes. Investigations carried out over the last several years by the authors and other groups are reviewed in this article. Results for lithium manganese oxide spinel cathodes, carbon-based and SnO anodes, and polymer and gel electrolytes are discussed.

scholarly journals Evaluation of Reactivity (pKa) of Substituted Aromatic Diamines, Monomers for Polyamides Synthesis, via Nuclear Magnetic Resonance, NMR-1H

2020 ◽  
Vol 3 (1) ◽  
pp. 12
Author(s):  
Juan Enrique Tacoronte Morales ◽  
María Teresa Cabrera Pedroso ◽  
Joseph Cruel Siguenza ◽  
Carla Bernal Villavicencio
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Analytical Tool ◽  
Aromatic Diamines ◽  
Aromatic Polyamides ◽  
Dialysis Membranes ◽  
Protection Devices ◽  
Impact Protection ◽  
The Relationship ◽  
Nuclear Magnetic

The relationship between properties of aromatic polyamides and the structure and pKa of substituted diamine monomers allows for modeling and designing the synthesis of polymers with special properties for different uses (dialysis membranes, ion exchange systems, to thermo-resistant materials and impact protection devices). Nuclear Magnetic Resonance is a versatile analytical tool for such purposes. Based on the obtained equations (pKa = 13.1512 − 1.67039 × (ppm)), and chemical shift (, ppm) = −7.0593 − (37.57628 × φ) the reactivity of the monomers can be calculated and selectively modify some properties of polyamides. Aromatic diamines were synthetized according to established protocols and statistical-molecular studies were developed using Hyperchem pack-2005 and Mopac-6.

Ion Dynamics at Interfaces: Nuclear Magnetic Resonance Studies

MRS Bulletin ◽  
2009 ◽  
Vol 34 (12) ◽  
pp. 915-922 ◽  
Author(s):  
Paul Heitjans ◽  
Martin Wilkening
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Materials Science ◽  
Dynamic Properties ◽  
Average Particle Size ◽  
Functional Materials ◽  
Transport Processes ◽  
Average Particle ◽  
Diffusion Parameters ◽  
Nuclear Magnetic

AbstractInterface engineering and the study of diffusion and transport processes through and along interfacial regions play important roles in materials science and energy research. For the latter, nanostructured materials are increasingly considered to act as powerful electrodes and solid electrolytes in sustainable energy systems, such as Li ion batteries. This is due to reduced diffusion lengths achieved when going to the nanometer scale and the fact that nanocrystalline materials with an average particle size of less than about 50 nm often show an enhanced diffusivity of their charge carriers. In this article, we show examples of how solid-state nuclear magnetic resonance (NMR) spectroscopy can be used to study the diffusion parameters of Li cations located in the interfacial regions separately from those in the interior of the grains. This article will demonstrate the future challenges and perspectives of Li NMR as a powerful tool of probing dynamic properties in functional materials.

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