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NMR study of the temperature and viscosity effects on paramagnetic chemical shifts and relaxation rate enhancements in the thermoreversible gel system of poloxamer 407 with [Dy(DTPA)]2− Full article

Journal Polyhedron
ISSN: 1873-3719 , E-ISSN: 0277-5387
Output data Year: 2026, Volume: 299, Article number : 118352, Pages count : 8 DOI: 10.1016/j.poly.2026.118352
Tags Poloxamer 407, Dysprosium(III,) Diethylenetriamine pentaacetate, Paramagnetic NMR, Viscosity
Authors Zapolotsky Eugeny N. 1 , Babailov Sergey P. 1
Affiliations
1 Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 Lavrentiev Ave., Novosibirsk 630090, Russia

Funding (1)

1

Abstract: In this study, NMR spectroscopy was used to investigate the temperature dependences of paramagnetic chemical shifts in a 22% solution of poloxamer 407 with and without the addition of the [Dy(DTPA)]2- complex. The half-width of the polymer signals in the system with the paramagnetic additive depends significantly on the solution viscosity and temperature due to the Curie-spin contribution to the paramagnetic spin-spin relaxation rate enhancement. The [Dy(DTPA)]2-complex can be considered as a promising compound for the design of temperature-sensitive NMR probes aimed at determining local temperature and viscosity in aqueous media and dispersed systems.
Cite: Zapolotsky E.N. , Babailov S.P.
NMR study of the temperature and viscosity effects on paramagnetic chemical shifts and relaxation rate enhancements in the thermoreversible gel system of poloxamer 407 with [Dy(DTPA)]2−
Polyhedron. 2026. V.299. 118352 :1-8. DOI: 10.1016/j.poly.2026.118352 WOS Scopus OpenAlex
Dates:
Submitted: Apr 1, 2026
Accepted: Oct 1, 2026
Published online: Oct 1, 2026
Published print: Nov 1, 2026
Identifiers:
≡ Web of science: WOS:001869305100001
≡ Scopus: 2-s2.0-105049065148
≡ OpenAlex: W7204260114
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