Relaxometric study of copper [15]metallacrown-5 gadolinium complexes derived from alpha-aminohydroxamic acids.
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.
Parac-Vogt
Tatjana N
TN
Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Leuven, Belgium.
Pacco
Antoine
A
Nockemann
Peter
P
Laurent
Sophie
S
Muller
Robert N
RN
Wickleder
Mathias
M
Meyer
Gerd
G
Vander Elst
Luce
L
Binnemans
Koen
K
D003300:Copper / Q000737:chemistry*; D005682:Gadolinium / Q000737:chemistry*; D006877:Hydroxamic Acids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
D006877:Hydroxamic Acids; D009942:Organometallic Compounds; D003300:Copper; D005682:Gadolinium; D015032:Zinc