Mesoporous Metal-Organic Framework

A porous metal-organic framework comprising at least one at least bidentate organic compound coordinated to at least one metal ion, wherein the at least one metal ion is AlIII and the at least one at least bidentate organic compound is a six-membered aromatic hydrocarbon ring A in which one or more ring carbons may be replaced by nitrogen and which has three substituents X and optionally one or more substituents selected from the group consisting of R, NRR′, OR, SR, F, Cl and Br, where R, R′ are each, independently of one another, hydrogen, methyl which may optionally be substituted by one or more fluorine atoms or ethyl which may optionally be substituted by one or more fluorine atoms and each X is, independently of the others, C(═O)O−, C(═S)O−, C(═O)S−, C(═S)S− or a protonated form thereof, characterized in that the metal-organic framework in powder has a specific surface area determined by the Langmuir method of at least 800 m2/g.