Self-Assembled Microporous M-HOFs Based on an Octahedral Rhenium Cluster with Benzimidazole
Dmitry I. Konovalov, Anton A. Ivanov, Yuri A. Vorotnikov, Natalia V. Kuratieva, Ilia V. Eltsov, Konstantin A. Kovalenko, Michael A. Shestopalov
Abstract
Substitution of apical halide ligands in [{Re6Sei8}Xa6]3– (X = Cl, Br) by benzimidazole (bimzH) accompanied by a self-assembly process leads to the formation of microporous Re6-based hydrogen-bonded organic frameworks (Re6-HOFs) constructed on N–H···X hydrogen bonds and π–π-stacking interactions between bimzH ligands. Re6-HOFs demonstrate sorption properties with a Brunauer–Emmett–Teller surface area of up to 443 m2 g–1 and luminescence with a quantum yield and an emission lifetime of up to 0.16 and 16 μs, respectively. The compounds obtained complement small groups of transition-metal cluster-based HOFs, which are a perspective for the development of multifunctional frameworks.