Selectively catalytic micro- and nanocrystals of metal–organic framework [Co(4-bpdh)(HIA)]∝

•Synthesis and structure of metal–organic framework [Co(4-bpdh)(HIA)]∝.•Selectively catalytic micro- and nanocrystals.•The degradation and conversion of methyl orange.

Metal–organic framework micro-crystals [Co(4-bpdh)(HIA)]∝ (1Co), crystallized in the monoclinic system (space group P12/n1, a=10.0009(16) Å, b=15.472(3) Å, c=18.563(3) Å, β=91.81(0)°, and Z=4), were controllably synthesized through the adjustment of the solvent system. The Co2+ ion center located in a six-coordinated environment combined with 5-hydroxyisophthalic acid (HIA) to produce ladder-like structures, which again linked with 2,5-bis(4-pyridyl)-3,4-diaza-2,4-hxadiene (4-bpdh) to yield a double-layer network. Micro-crystals 1Co exhibited selectively oxidation-catalytic properties for the degradation of methyl orange (conversion 90%) owing to ligand to metal charge transfer. Our work determined that the synthesized catalyst is not only highly selective for degradation of organic dyes, but also very efficient.

Graphical abstractMetal–organic framework micro-crystals [Co(4-bpdh)(HIA)]∝ (1Co) were controllably synthesized through the adjustment of the solvent system. The Co2+ ion center located in a six-coordinated environment combined with the ligands to yield a double-layer network. Micro-crystals 1Co exhibited selectively catalytic properties for the degradation of methyl orange (conversion 90%) owing to ligand to metal charge transfer.Figure optionsDownload full-size imageDownload as PowerPoint slide