Nuclear magnetic resonance characterisation of ionic liquids and organic ionic plastic crystals: common approaches and recent advances

2021 ◽  
Author(s):  
Haijin Zhu ◽  
Luke Austin O'Dell
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Ionic Liquids ◽  
Solid State ◽  
Magnetic Resonance ◽  
Plastic Crystals ◽  
Recent Advances ◽  
Wide Range ◽  
Nuclear Magnetic

Ionic liquids, and their solid-state equivalents organic ionic plastic crystals, show many useful and tailorable properties that make them interesting for a wide range of applications including as electrolytes for...

Solid State NMR Measurements for Preliminary Lifetime Assessments in λ-Irradiated and Thermally Aged Siloxane Elastomers

2004 ◽  
Vol 851 ◽  
Author(s):  
Sarah C. Chinn ◽  
Julie L. Herberg ◽  
April M. Sawvel ◽  
Robert S. Maxwell
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Coupling Constants ◽  
Screening Tools ◽  
Engineering Properties ◽  
Relaxation Rates ◽  
Nmr Studies ◽  
Wide Range ◽  
Nuclear Magnetic

ABSTRACTSiloxanes have a wide variety of applications throughout the aerospace industry which take advantage of their exceptional insulating and adhesive properties and general resilience. They also offer a wide range of tailorable engineering properties with changes in composition and filler content. They are, however, subject to degradation in radiatively and thermally harsh environments. We are using solid state nuclear magnetic resonance techniques to investigate changes in network and interfacial structure in siloxane elastomers and their correlations to changes in engineering performance in a series of degraded materials. Nuclear magnetic resonance (NMR) parameters such as transverse (T2) relaxation times, cross relaxation rates, and residual dipolar coupling constants provide excellent probes of changes crosslink density and motional dynamics of the polymers caused by multi-mechanism degradation. The results of NMR studies on aged siloxanes are being used in conjunction with other mechanical tests to provide insight into component failure and degradation kinetics necessary for preliminary lifetime assessments of these materials as well as into the structure-property relationships of the polymers. NMR and magnetic resonance imaging (MRI) results obtained both from high resolution NMR spectrometers as well as low resolution benchtop NMR screening tools will be presented.

Recent Advances in Solid-State Nuclear Magnetic Resonance Techniques for Materials Research

2020 ◽  
Vol 50 (1) ◽  
pp. 493-520
Author(s):  
Po-Hsiu Chien ◽  
Kent J. Griffith ◽  
Haoyu Liu ◽  
Zhehong Gan ◽  
Yan-Yan Hu
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Ion Dynamics ◽  
Structure Property ◽  
Recent Advances ◽  
Materials Research ◽  
Nmr Techniques ◽  
Nuclear Magnetic

Establishing structure–property correlations is of paramount importance to materials research. The ability to selectively detect observable magnetization from transitions between quantized spin states of nuclei makes nuclear magnetic resonance (NMR) spectroscopy a powerful probe to characterize solids at the atomic level. In this article, we review recent advances in NMR techniques in six areas: spectral resolution, sensitivity, atomic correlations, ion dynamics, materials imaging, and hardware innovation. In particular, we focus on the applications of these techniques to materials research. Specific examples are given following the general introduction of each topic and technique to illustrate how they are applied. In conclusion, we suggest future directions for advanced solid-state NMR spectroscopy and imaging in interdisciplinary research.

scholarly journals Recent Advances in Probing Host-Guest Interactions with Solid State Nuclear Magnetic Resonance

CrystEngComm ◽  
2021 ◽  
Author(s):  
Ashlea Hughes ◽  
Frédéric Blanc
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Supramolecular Chemistry ◽  
Recent Advances ◽  
Nuclear Magnetic

An overview of the recent role of solid-state Nuclear Magnetic Resonance (NMR) spectroscopy in the field of supramolecular chemistry to probe host-guest interactions is provided. Over the last few years,...

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