A heterodinuclear macrocyclic complex containing both Yb3+ and Na+ ions has been synthesized and characterized by X-ray crystallography and 1H and 23Na solution NMR; at room temperature the coordinated Na+ ion is in slow chemical exchange with free Na+ ions and its NMR resonance is strongly shifted.
U. Casellato, S. Tamburini, P. Tomasin, P. A. Vigato, S. Aime, A. Barge and M. Botta, Chem. Commun., 2000, 145 DOI: 10.1039/A909367B
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