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a) High resolution 1H NMR spectra of EuDOTA-(gly-OEt)43+ in water at pH 7 (showing only the downfield region). The 1H resonance near 57 ppm is the Eu3+- bound water molecule. b) Calculated Eu3+-bound water resonance at each temperature based upon line-fitting of the bound and bulk water resonances at each temperature. The bound water lifetimes at each temperature are shown.
