Gallium species incorporated into MOF structure: insight into the formation of a 3D polycrystalline gallium-imidazole framework

0532774 - ÚMCH 2021 RIV US eng J - Journal Article
Kobera, Libor - Havlín, J. - Abbrent, Sabina - Rohlíček, Jan - Strečková, M. - Sopčák, T. - Kyselová, V. - Czernek, Jiří - Brus, Jiří
Gallium species incorporated into MOF structure: insight into the formation of a 3D polycrystalline gallium-imidazole framework.
Inorganic Chemistry. Roč. 59, č. 19 (2020), s. 13933-13941. ISSN 0020-1669. E-ISSN 1520-510X
R&D Projects: GA ČR(CZ) GA19-05259S
Research Infrastructure: CESNET II - 90042; CERIT-SC - 90085; CIISB II - 90127
Institutional support: RVO:61389013 ; RVO:68378271
Keywords : metal-organic framework materials * Ga(I m) 6 MOF * structural analysis
OECD category: Analytical chemistry; Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Impact factor: 5.165, year: 2020
Method of publishing: Limited access
https://pubs.acs.org/doi/10.1021/acs.inorgchem.0c01563

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.
Permanent Link: http://hdl.handle.net/11104/0312886