The Amide Protons of an Ytterbium(III) dota Tetraamide Complex Act as Efficient Antennae for Transfer of Magnetization to Bulk Water This work was supported in part by grants from the Robert A. Welch Foundation (AT-584), the National Institutes of Health (CA-84697), and the Division of Research Resources, National Institutes of Health (RR-02584). We thank Professor Silvio Aime for providing a copy of his manuscript prior to publication.