Preparation of heterogeneous catalysts by the post-synthetic modification of mesoporous metal-organic framework MIL-101

Preparation of sulfur–MOF composites and their application in the Willgerodt–Kindler reaction

“…The low yields of the target product in the case of S@MIL-101(Cr) can be attributed to the presence of numerous unsaturated coordination sites, which cause the removal of the amine from the reaction medium. 39,40 Better results were achieved with S@MIL-53(Al), but a loss of MOF mass (7-10%) and the release of a small amount of terephthalic acid during the reaction mixture treatment were detected. It is unclear whether this fact is associated with the destruction of surface layers or the removal of ligand residual amounts from the MOF pores.…”