[2Bp01-10] Surface Analysis/Applied Surface Science/Evaluation Technique (ASS)

[2Bp06] DNP surface-enhanced NMR spectroscopy for metal oxides and sulfides

*Hiroki Nagashima¹, Julien Trebosc³, Yoshihiro Kon¹, Olivier Lafon², Jean-Paul Amoureux^2,4 (1. Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology, 2. Université de Lille, Centre national de la recherche scientifique, Unité de Catalyse et Chimie du Solide, 3. Université de Lille, Centre national de la recherche scientifique, Institut Michel Eugène Chevreul, 4. Bruker Biospin)

In recent years, DNP surface-enhanced NMR spectroscopy (DNP-SENS) has been developed as a unique analytical technique for characterization of surface structures at atomic level scale, and is being applied to various materials. In DNP-SENS experiments, polarization transfer "e^- ⇒ ¹H ⇒ observation nuclei" is necessary, but when the observation nuclei are quadrupole nuclei, which account for 74 % of the periodic table, polarization transfer from ¹H was hard to perform. In this presentation, we introduce novel pulse sequences, adiabatic D-RINEPT, that can transfer the polarization from ¹H to the quadrupolar nuclei and show its application to metal oxides and sulfides.