External double reference method to study concentration and temperature dependences of chemical shifts determined on a unified scale

We present the principle of an external reference method of NMR, named the external double reference method, to study concentration and temperature dependences of chemical shifts. By the method, we refer chemical shifts of various samples at different temperatures to the peak of a reference substanc...

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Bibliographic Details
Published in:Pure and applied chemistry 2004-01, Vol.76 (1), p.105-114
Main Authors: Mizuno, K., Tamiya, Y., Mekata, Mamoru
Format: Article
Language:English
Subjects:
Deuteration
NMR
Nuclear magnetic resonance
Organic chemistry
Temperature
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Summary:We present the principle of an external reference method of NMR, named the external double reference method, to study concentration and temperature dependences of chemical shifts. By the method, we refer chemical shifts of various samples at different temperatures to the peak of a reference substance at a fixed referring temperature. Thus, we can determine the chemical shifts in a variety of sample conditions on a unified scale. Results of the application of the method to H- and C-chemical shifts of water and methanol are presented. We also report new data of volume magnetic susceptibilities for several deuterated solvents useful for the calibration in the method.
ISSN:0033-4545
1365-3075
DOI:10.1351/pac200476010105