19F MAS DNP for Probing Molecules in Nanomolar Concentrations: Direct Polarization as Key for Solid-State NMR Spectra without Solvent and Matrix Signals
K.P. van der Zwan, W. Riedel, F. Aussenac, C. Reiter, K. Kreger, H.-W. Schmidt, T. Risse, T. Gutmann, J. Senker, Journal of Physical Chemistry C 125 (2021) 7287–7296.