Rare-nuclei localization in solids by Hartmann-Hahn cross-relaxation

We present a special solid state NMR imaging approach which is able to give maps of the heteronuclear dipolar interaction (in this case H-1-C-13) and, therefore, of the rare-nuclei distribution. Such an approach utilizes the cross-relaxation mechanism based on the Hartmann-Hahn matching condition. T he cross-relaxation map is also able to provide mobile-rigid structure dist ribution as well as the spatial-dependent degree of cross-linking in solid polymers and elastomers. (C) 2000 Published by Elsevier Science ltd.