The gadolinium endometallofullerene/empty fullerene hydroxylated mixtures were prepared and studied as MRI-contrasting agents. The mixtures were prepared with metallofullerene enrichment of more than 80 mol.% by simple liquid extraction. The hydroxylation was performed by H2O2 oxidation at elevated temperature. Nanoaggregation of mixed fullerenes in water solution was studied by SANS. It was observed that at pH = 7 the cluster correlation diameter is 25 nm. NMR tomography in-vivo reveals that contrasting action of hydroxylated gadofullerene mixtures is 15–30 times its commercial “Gadovist” contrasting agent.
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Grushko et al. (2010) studied this question.
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