Fabricating defect-rich metal–organic frameworks via mixed linker-induced crystal transformation

Defect-rich hcp UiO-66-NO2 was synthesized via mixed linker-induced crystal transformation from fcu UiO-66-NO2/NH2. The defect concentration and porosity of hcp UiO-66-NO2 can be fine-tuned by varying the BDC-NH2/BDC-NO2 ratio, which in turn endowed hcp UiO-66-NO2 with superior catalytic performance in the ring-opening reaction of epoxides with alcohols.