AI Article Synopsis
- Proton NMRD profiles were collected for lanthanum(III) and gadolinium(III) metallacrown-5 complexes involving alpha-aminohydroxamic acids, studying their proton relaxivity across a magnetic field range.
- A linear correlation was found between the proton relaxivity and the molecular mass of the metallacrown complexes, indicating size influences their performance.
- The study also included transmetalation tests with zinc(II) ions and detailed the crystal structure of the copper metallacrown-5 gadolinium complex featuring glycine hydroximate ligands.
Article Abstract
Proton nuclear magnetic relaxation dispersion (NMRD) profiles were recorded between 0.24 mT and 1.4 T for lanthanum(III)- and gadolinium(III)-containing [15]metallacrown-5 complexes derived from alpha-aminohydroxamic acids and with copper(II) as the ring metal. The influence of the different R-groups on the proton relaxivity was investigated, and a linear relationship between the relaxivity and the molecular mass of the metallacrown complex was found. The selectivity of the metallacrown complexes was tested by transmetalation experiments with zinc(II) ions. The crystal structure of the copper [15]metallacrown-5 gadolinium complex with glycine hydroximate ligands is reported.
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| http://dx.doi.org/10.1002/chem.200500136 | DOI Listing |
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