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NMR STUDY OF THE TEMPERATURE DEPENDENCE OF PARAMAGNETIC CHEMICAL SHIFTS OF [Dy(DTPA)]2– IN SOLUTIONS AT VARIOUS pH VALUES

Abstract

The NMR spectra of complex [Dy(DTPA)]2– are studied at various temperatures and pH values of the aqueous solution. The NMR signals of [Dy(DTPA)]2– are most sensitive to temperature changes (the maximum temperature sensitivity is 2.2 ppm/K at pH = 7.4) and are almost insensitive to pH changes in the range from 3.3 to 11.0. A significant change of chemical shifts is observed only in the pH region from 3.3 to 1.1 due to the formation of protonated forms of the complexes. [Dy(DTPA)]2– can be considered as a promising reagent for temperature determination in aqueous media using in vitro and in vivo NMR.

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Funding

This work was funded by the Russian Science Foundation (project No. 20-63-46026).

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Correspondence to S. P. Babailov.

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Zapolotsky, E.N., Babailov, S.P. NMR STUDY OF THE TEMPERATURE DEPENDENCE OF PARAMAGNETIC CHEMICAL SHIFTS OF [Dy(DTPA)]2– IN SOLUTIONS AT VARIOUS pH VALUES. J Struct Chem 63, 983–987 (2022). https://doi.org/10.1134/S0022476622060166

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  • DOI: https://doi.org/10.1134/S0022476622060166

Keywords

  • dysprosium(III)
  • diethylenetriaminepentaacetate
  • pH
  • paramagnetic NMR
  • chemical shift
  • temperature dependence.