Livramento, João BrunoTóth, ÉvaSour, AngéliqueBorel, AlainMerbach, André E.Ruloff, Robert2006-08-112006-08-112006-08-11200510.1002/anie.200461875https://infoscience.epfl.ch/handle/20.500.14299/232834WOS:000227475500005Good things come in small packages: For its moderate molecular weight, the metallostar complex [Fe{Gd2L(H2O)4}3]4− (see picture; L is a bipyridine–poly(aminocarboxylate) derivative) displays exceptionally high proton relaxivity, which is explained in terms of a rigid supramolecular structure, two inner-sphere water molecules with a near-optimal exchange rate, and six efficiently relaxing GdIII centers confined to a small molecular space.gadoliniumheterometallic complexesimaging agentsNMR spectroscopyself-assemblytext::journal::journal article::research article