Nuclear magnetic resonance study of the temperature dependence of paramagnetic chemical shifts of [Co(EDTA)]2− complexes in gelatin gel

NMR spectroscopy was applied to study the temperature dependences of paramagnetic chemical shifts of the [Co(EDTA)] 2− complex ( 1 ) in D 2 O solution and in 10% gelatin gel (as a model medium for human or animal tissues). The maximum temperature sensitivity of the chemical shifts d(δ exp )/d T was...

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Bibliographic Details
Published in:Russian chemical bulletin 2023, Vol.72 (5), p.1262-1267
Main Authors: Babailov, S. P., Zapolotsky, E. N.
Format: Article
Language:English
Subjects:
Aqueous solutions
Brief Communications
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Dipoles
Ethylenediaminetetraacetic acids
Gelatin
Inorganic Chemistry
NMR spectroscopy
Organic Chemistry
Temperature dependence
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Summary:NMR spectroscopy was applied to study the temperature dependences of paramagnetic chemical shifts of the [Co(EDTA)] 2− complex ( 1 ) in D 2 O solution and in 10% gelatin gel (as a model medium for human or animal tissues). The maximum temperature sensitivity of the chemical shifts d(δ exp )/d T was found to be 0.64 ppm K −1 (in 10% gelatin gel). The half-width of the signals of the complex essentially depends on the solution viscosity and temperature, owing to the dipole contribution to the paramagnetic increase in the spin—spin relaxation rate. Complex 1 can be considered as a promising compound for the design of temperature-sensitive NMR probes for determining the local temperature in aqueous media and for advanced diagnosis of diseases using MRI technologies.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-023-3899-6