Abstract
NMR spectroscopy was applied to study the temperature dependences of paramagnetic chemical shifts of the [Co(EDTA)]2− complex (1) in D2O solution and in 10% gelatin gel (as a model medium for human or animal tissues). The maximum temperature sensitivity of the chemical shifts d(δexp)/dT 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.
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This study was supported by the Russian Science Foundation (Project No. 20-63-46026).
No human or animal subjects were used in this research.
The authors declare no competing interests.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, Vol. 72, No. 5, pp. 1262–1267, May, 2023.
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Babailov, S.P., Zapolotsky, E.N. Nuclear magnetic resonance study of the temperature dependence of paramagnetic chemical shifts of [Co(EDTA)]2− complexes in gelatin gel. Russ Chem Bull 72, 1262–1267 (2023). https://doi.org/10.1007/s11172-023-3899-6
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DOI: https://doi.org/10.1007/s11172-023-3899-6