Abstract We present the synthesis and characterization of porous interpenetrated zirconium– organic frameworks (PIZOFs), a new family of metal–organic frameworks obtained from ZrCl 4 and the rodlike dicarboxylic acids HO 2 C [PE-P (R 1, R 2)-EP] CO 2 H that consist of alternating phenylene (P) and ethynylene (E) units. The substituents R 1, R 2 were broadly varied (alkyl, O [BOND] alkyl, oligo (ethylene glycol)), including postsynthetically ...