Hyperpolarization transfer pathways in inorganic materials

Dynamic nuclear polarization can be used to hyperpolarize the bulk of proton-free inorganic materials in magic angle spinning NMR experiments. The hyperpolarization is generated on surface material with incipient wetness impregnation and from there it propagated towards through homonuclear spin diffusion between weakly magnetic nuclei. This method provide significant gains sensitivity for MAS spectra compounds, but pathways magnetization transfer into have not previously been elucidated. Here we show how two-dimensional experiments study a bulk. We find that efficiently relayed sites multiple simultaneously, also engage rapid exchange themselves. evidence peaks different cases disorder.