Interpenetrated and non-interpenetrated homochiral metal–organic frameworks based on (R)-2,2′-dihydroxy-1,1′-binaphthyl-5,5′-dibenzoic acid

Abstract

A new example of interpenetration that is simply controlled by modifying hydroxyl function in homochiral MOFs is reported. Interpenetrated and non-interpenetrated chiral metal–organic frameworks (MOF-1 and MOF-2) were prepared by solvothermal reactions of [Cu(NO₃)₂]·3H₂O in N,N-dimethylformamide (DMF)–H₂O solution with (R)-2,2′-dihydroxy-1,1′-binaphthyl-5,5′-dibenzoic acid (H₂L1) and (R)-2,2′-dimethoxy-1,1′-binaphthyl-5,5′-dibenzoic acid (H₂L2), respectively. Interpenetrated chiral MOF-1 exhibited much higher catalytic performance in the Diels–Alder reaction of acrolein and 1,3-cyclohexadiene than non-interpenetrated chiral MOF-2.