Catalytically competent Ir, Re, and Ru complexes H2 L 1–H2 L 6 with dicarboxylic acid functionalities were incorporated into a highly stable and porous Zr6O4 (OH) 4 (bpdc) 6 (UiO- 67, bpdc= para-biphenyldicarboxylic acid) framework using a mix-and-match synthetic strategy. The matching ligand lengths between bpdc and L 1–L 6 ligands allowed the construction of highly crystalline UiO-67 frameworks (metal–organic frameworks (MOFs) 1 ...