Festkörper-NMR- und DNP-Untersuchungen an anorganisch-organischen Funktionsmaterialien

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This thesis explores the use of solid state nuclear magnetic resonance (ssNMR) and dynamic nuclear polarization (DNP) for characterizing functional materials. DNP significantly enhances the sensitivity of ssNMR, allowing for the measurement of 15N nuclei in natural abundance alongside 13C nuclei. This combination proves invaluable for analyzing inorganic-organic functional materials with minimal surface functionalization or low specific surface areas. The research encompasses various materials, including chemically modified cellulose and core-shell particle systems. The first section investigates cellulose-based materials using DNP-enhanced 13C CP MAS to identify surface-near functional groups, with DNP-enhanced 15N CP MAS experiments confirming the presence of nitrogen-containing groups. The second part focuses on core-shell particle systems, where organic particles with silicon-containing shells are analyzed using 29Si CP MAS, supplemented by DNP and 13C CP MAS to examine the 29Si nuclei directly. This facilitates the characterization of cross-linking in the shells of these particles and the molecular-level binding of allylhydidopolycarbosilane (SMP-10) to core particles. The final section applies ssNMR techniques to cross-linked epoxy resins (thermosets) to determine their structure and chemical composition. The analysis includes the basic components and extends to phosphorus-containing flame retardants characterized by