Oxygen-17 dynamic nuclear polarisation enhanced solid-state NMR spectroscopy at 18.8 T

We thank Dr Sachin R. Chaudhari (CRMN Lyon), Kenneth K. Inglis (University of Liverpool), and Dr O. Ouari and Prof. P. Tordo (Aix-Marseille Universite, CNRS) for valuable technical assistance, sample preparation, and radicals, respectively. F. B. thanks the TGIR-RMN-THC Fr3050 CNRS for access to the 18.8 T DNP NMR facility at the CRMN. The experimental data are provided as a supporting dataset from the University of Liverpool Data Catalogue portal at https://datacat.liverpool.ac.uk/245/.; International audience; We report (17)O dynamic nuclear polarisation (DNP) enhanced solid-state NMR experiments at 18.8 T. Several formulations were investigated on the Mg(OH)2 compound. A signal enhancement factor of 17 could be obtained when the solid particles were incorporated into a glassy o-terphenyl matrix doped with BDPA using the Overhauser polarisation transfer scheme whilst the cross effect mechanism enabled by TEKPol yielded a slightly lower enhancement but more time efficient data acquisition.