Comment on the intermolecular relaxation dispersion at 400, 600, 800 MHz of the (CH3)(4)N+ protons in D2O solutions with paramagnetic [Gd(D2O)(8)](3+) complexes

New high-field proton relaxation measurements are satisfactorily interprete d without any adjustable parameter by a theoretical model based on the Solo mon relaxation formalism and on the relative translational Brownian diffusi on of the cation pair. Thus, at least in this frequency range, the longitud inal electron relaxation times of Gd3+ longer than the translational correl ation time of the interionic diffusion, in agreement with the EPR studies o f Merbach's group (Helv. Chim. Acta 76 (1993) 2129), but in contradiction w ith Dinesen's and Bryant's conclusion (Chem. Phys. Lett. 303 (1999) 187). ( C) 2000 Elsevier Science B.V. All rights reserved.