Solid-state NMR studies of supported transition metal catalysts and nanoparticles

Abstract

The following book chapter reviews recent advances in solid-state NMR spectroscopy of heterogenized transition metal catalysts that have widespread application potential for technical reactions, i.e., to produce structural building blocks for pharmaceuticals. Catalysts based on mesoporous solid support materials such as silica or crystalline nanocellulose (CNC) as well as catalysts based on inorganic organic hybrid nanoparticles are discussed in terms of their synthesis, application, and physicochemical characterization. The power of 1D and 2D multinuclear solid-state NMR techniques of sensitive nuclei such as 31 P as well as of quantitative 19 F solid-state NMR is demonstrated at selected examples of heterogeneous rhodium and iridium catalysts. For less sensitive nuclei especially of 15 N, the combination of high-field solid-state NMR with dynamic nuclear polarization (DNP) is presented as an effective method to dramatically boost the sensitivity of NMR and allow measurements of samples with natural abundance of 15 N.