A practical tutorial to set up NMR diffusometry equipment: application to liquid crystals

NMR diffusometry is nowadays a well‐established and powerful technique to investigate molecular translation in fluid materials. Standard NMR diffusometry approaches are based on pulsed field gradients generated by specific hardware and specially designed NMR probes. Here, we present an alternative s...

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Bibliographic Details
Published inMagnetic resonance in chemistry Vol. 52; no. 10; pp. 640 - 648
Main Author Cifelli, M.
Format Journal Article
LanguageEnglish
Published England Blackwell Publishing Ltd 01.10.2014
Wiley Subscription Services, Inc
Subjects
CT-STE
Diffusion
Diffusion rate
diffusometry
fringe field
Hardware
Liquid crystals
Nuclear magnetic resonance
Phases
polymer melts
STE
STRAFI
Superconducting magnets
Translations
CT-STE
STE
fringe field
polymer melts
STRAFI
liquid crystals
diffusometry
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Summary:NMR diffusometry is nowadays a well‐established and powerful technique to investigate molecular translation in fluid materials. Standard NMR diffusometry approaches are based on pulsed field gradients generated by specific hardware and specially designed NMR probes. Here, we present an alternative set‐up that exploits the static gradient present in the fringe field of any commercial superconducting magnet. This stray field diffusometry technique can be particularly useful to study diffusional processes in fast‐relaxing and slow‐diffusing systems, such as thermotropic liquid crystals, ionic liquids and polymer melts. Copyright © 2014 John Wiley & Sons, Ltd. A practical tutorial is presented to undertake NMR diffusometry in the fringe field of a superconducting magnet employing the hardware commonly available in an NMR laboratory. As an example, the application of the technique to measure translational diffusion in liquid crystalline phases of calamitic mesogens is also reported.
Bibliography:istex:D91D5DAA10D0376F2ABBD8F3B1992015B8C29F09
ark:/67375/WNG-6KZCKN7K-9
ArticleID:MRC4105
This article is published in Magnetic Resonance in Chemistry as a special issue on the NMR of Liquid Crystals by Ronald Y. Dong (Department of Physics and Astronomy, UBC, Vancouver, Canada).
ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0749-1581
1097-458X
DOI:10.1002/mrc.4105