Correction to “A Hafnium-Based Metal–Organic Framework as a Nature-Inspired Tandem Reaction Catalyst”

A novel hafnium–graphite oxide catalyst for the Meerwein–Ponndorf–Verley reaction and the activation effect of the solvent

Construction and application of novel hydrogenation catalysts is important for the conversion of carbonyl or aldehyde compounds into alcohols in the field of biomass utilization. In this work, a novel, efficient, and easily prepared hafnium–graphite oxide (Hf–GO) catalyst was constructed via the coordination between Hf⁴⁺ and the carboxylic groups in GO. The catalyst was applied into the hydrogenation of biomass derived carbonyl compounds via the Meerwein–Ponndorf–Verley (MPV) reaction. The catalyst gave high efficiency under mild conditions. An interesting phenomenon was found whereby the activity of the catalyst increased gradually in the initial stage during reaction. The solvent, isopropanol, was proved to have an activation effect on the catalyst, and the activation effect varied with different alcohols and temperatures. Further characterizations showed that isopropanol played the activation effect via replacing the residual solvent (DMF) in micro- and mesopores during the preparation process, which was hard to be completely removed by common drying process.

Novel Hf–GO hybrid is efficient for MPV reactions of biomass-derived carboxyl compounds, and isopropanol can activate Hf–GO by first removing residual DMF in micro- and mesopores and then interacting with Hf–O sites.

Amine-functionalized MIL-101(Cr) embedded with Co(ii) phthalocyanine as a durable catalyst for one-pot tandem oxidative A3coupling reactions of alcohols

In this study, we report a metal–organic framework (MIL-101(Cr)-NH₂) postsynthetically modifiedviacovalent immobilization of cobalt(ii) phthalocyanine as an efficient and mild catalytic system.