Acquisition of 1H-Detected 103Rh and 99Ru Solid-State Nuclear Magnetic Resonance Spectra in Stationary Samples

The platinum group elements (PGEs) are among the most important in the periodic table due to their critical roles in a diverse array of applications. There is great interest in using solid-state nuclear magnetic resonance (SSNMR) for studying the structure and bonding in PGE complexes from the perspective of the metal nuclides, yet this has been limited to date. This is largely due to the inherently low Larmor frequencies of many of the PGE nuclides in addition to factors such as low natural abundances and/or large anisotropic interactions that reduce their receptivity to the NMR experiment. In this work, we demonstrate for the first time the ability to indirectly detect (with ¹H, I = 1/2) wideline SSNMR powder patterns from stationary samples of compounds featuring ¹⁰³Rh (S = 1/2) and ⁹⁹Ru (S = 5/2) using the recently introduced progressive saturation of the proton reservoir (PROSPR) pulse sequence.