Surprising Complexity of the [Gd(AAZTA)(H₂O)₂]^- Chelate Revealed by NMR in the Frequency and Time Domains.

ABSTRACT: Typically, Ln(III) complexes are isostructural along the series, which enables studying one particular metal chelate to derive the structural features of the others. This is not the case for [Ln(AAZTA)(H₂O)_x]^- (x = 1, 2) systems, where structural variations along the series cause changes in the hydration number of the different metal complexes, and in particular the loss of one of the two metal-coordinated water molecules between Ho and Er. Herein, we present a ¹H field-cycling relaxometry and ¹⁷O NMR study that enables accessing the different exchange dynamics processes involving the two water molecules bound to the metal center in the [Gd(AAZTA)(H₂O)₂]^- complex. The resulting picture sho

SUBMITTER: Lalli D 

PROVIDER: S-EPMC8753608 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature