The Effect of Disorder on Endogenous MAS-DNP: Study of Silicate Glasses and Crystals.

ABSTRACT: In dynamic nuclear polarization nuclear magnetic resonance (DNP-NMR) experiments, the large Boltzmann polarization of unpaired electrons is transferred to surrounding nuclei, leading to a significant increase in the sensitivity of the NMR signal. In order to obtain large polarization gains in the bulk of inorganic samples, paramagnetic metal ions are introduced as minor dopants acting as polarizing agents. While this approach has been shown to be very efficient in crystalline inorganic oxides, significantly lower enhancements have been reported when applying this approach to oxide glasses. In order to rationalize the origin of the difference in the efficiency of DNP in amorphous and crystalline inorganic matrices, we performed a detailed comparison in terms of their magnetic resonance prop

SUBMITTER: Thomas B 

PROVIDER: S-EPMC10009812 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature