Exciting Opportunities for Solid-State 95Mo NMR Studies of MoS2 Nano-structures in Materials Research from Low to Ultra-high Magnetic Field (35.2 T)

Solid-state, natural-abundance 95 Mo NMR experiments of four different MoS 2 materials have been performed on a magnet B 0 = 19.6 T and on a new Series Connected Hybrid (SCH) magnet at 35.2 T. Employing two different 2H-MoS 2 (2H phase) materials, a “pseudo-amorphous” MoS 2 nano-material, and a MoS 2 layer on the Al 2 O 3 support of a hydrodesulphurization (HDS) catalyst have enabled introduction of solid-state 95 Mo NMR as an important analytical tool in studies of MoS 2 nano-materials. 95 Mo spin-lattice relaxation time ( T 1 ) studies of 160- and 4-layer 2H-MoS 2 samples at 19.6 and 35.2 T show their relaxation rates (1/ T 1 ) increase in proportion to B 0 2 . This is in accord with chemical shift anisotropy (CSA) relaxation being the dominant T 1 ( 95 Mo) mechanism, with a large 95 Mo CSA = 1025 ppm determined for all four MoS 2 nano-materials. The dominant CSA mechanism suggests the MoS 2 band-gap electrons are delocalized throughout the lattice-layer structures, thereby acting as a fast modulation source ( ω o τ c