Integration of accessible secondary metal sites into MOFs for H2S removal

2,2'-Bipyridine-5,5'-dicarboxylic acid (H(2)bipy) was used for the synthesis of a zirconium based metal-organic framework with the aim to integrate an additional N-donor coordination functionality into the framework. The resulting MOF (UiO-67(bipy)) with a structure isoreticular to UiO-67 (UiO - University of Oslo) has a BET surface area up to 2500 m(2) g(-1). The chelating bipyridine moiety was used for post-synthetic functionalization of the MOF with different metal salts ((MXy)-X-II; M = Cu2+, Ni2+, Co2+; X = Cl-, NO3-, SO42-, acac(2-)) to give the corresponding metal_salt@UiO-67(bipy) materials. Due to the highly dispersed metal ions, metal_salt@UiO-67(bipy) shows good performance in toxic hydrogen sulfide capture. Especially, the copper loaded samples have high capacities of up to 7.8 wt%.