Catalytic oxygen evolution from hydrogen peroxide by trans -[Co(en) 2 Cl 2 ]@InBTB metal-organic framework catalytic system.

The diethylammonium counter-cations of the [Et 2 NH 2 ] 3 [In 3 (BTB) 4 ] metal-organic framework (InBTB MOF, BTB = 1,3,5-benzenetribenzoate) with an anionic framework can be effectively exchanged with cationic trans -[Co(en) 2 Cl 2 ] + complex ions through a simple cation-exchange process. The heterogenized trans -[Co(en) 2 Cl 2 ] + -encapsulated InBTB MOF ( trans -[Co(en) 2 Cl 2 ]@InBTB) catalytic system maintained the activity of the captured trans -[Co(en) 2 Cl 2 ] + complex ion for hydrogen peroxide decomposition in aqueous solution under mild reaction conditions. The captured trans -[Co(en) 2 Cl 2 ] + complex also exhibited trans - cis isomerization to produce either cis -[Co(en) 2 Cl 2 ]@InBTB or cis -[Co(en) 2 (H 2 O)Cl]@InBTB based on IR spectroscopic investigation. The trans -[Co(en) 2 Cl 2 ]@InBTB catalytic system showed high recyclability for oxygen evolution from hydrogen peroxide. The catalytic ability of trans -[Co(en) 2 Cl 2 ]@InBTB was maintained up to seven times of recycling.