New routes to the detection of relaxation allowed coherence transfer in paramagnetic molecules

The use of paramagnetic centers, either native or artificial, to assess structural and dynamic properties of biomolecules is quite fashionable in contemporary biomolecular NMR. Within the quest for paramagnetism-based NMR structural constraints, cross correlation rates between 1H Curie spin relaxation3 and 1H-X (X ) 1H, 15N, or 13C) dipole-dipole coupling are a powerful source of information, to date largely unexploited.