Halogen Functionalization of Aluminium Fumarate Metal–Organic Framework via In Situ Hydrochlorination of Acetylenedicarboxylic Acid*

Abstract

The successful chloro-functionalization of aluminium fumarate (MIL-53-Fum) was achieved by in situ hydrochlorination of acetylenedicarboxylic acid on reaction with aluminium chloride resulting in the formation of the aluminium chlorofumarate metal–organic framework (MIL-53-Fum-Cl = [Al(OH)(Fum-Cl)]) in a one-pot reaction. The chloro functional groups decorating the pores enhance gas (CO2, CH4, and H2) sorption capacities and affinity compared with the non-functionalized MIL-53-Fum. The functionalization also results in a 2-fold increase in the selective adsorption of CO2 over CH4 compared with MIL-53-Fum.