Success of the Department of NMR spectroscopy in Inorganic Chemistry
Researchers have succeeded in preparing a metal-organic lattice material formed of gallium atoms connected by imidazole rings. The results of the research of Libor Kobera from the Department of NMR spectroscopy are published in the prestigious journal Inorganic Chemistry.
The formation of a polycrystalline 3D gallium–imidazole framework (MOF) was closely studied in three steps using ssNMR, XRPD, and TGA. In all steps, the reaction products show relatively high temperature stability up to 500 °C. The final product was examined by structural analysis using NMR crystallography combined with TG and BET analyses, which enabled a detailed characterization of the polycrystalline MOF system on the atomic-resolution level. 71Ga ssNMR spectra provided valuable structural information on the coexistence of several distinct gallium species, including a tunable liquid phase. Moreover, using an NMR crystallography approach, two structurally asymmetric units of Ga(Im6)6– incorporated into the thermally stable polycrystalline 3D matrix were identified. Prepared polycrystalline MOF material with polymorphic gallium species is promising for use in catalytic processes.