Surface enhanced NMR spectroscopy by dynamic nuclear polarization

J Am Chem Soc. 2010 Nov 10;132(44):15459-61. doi: 10.1021/ja104771z.


It is shown that surface NMR spectra can be greatly enhanced using dynamic nuclear polarization. Polarization is transferred from the protons of the solvent to the rare nuclei (here carbon-13 at natural isotopic abundance) at the surface, yielding at least a 50-fold signal enhancement for surface species covalently incorporated into a silica framework.