Two 3D Metal–Organic Frameworks Based on CoII and ZnII Clusters for Knoevenagel Condensation Reaction and Highly Selective Luminescence Sensing

Two metal–organic frameworks (MOFs) with 3D structures, {[Co 24 (BDPO) 12 (H 2 O) 12 ]·18DMF·40H 2 O} n ( 1 ) and {[NH 2 (CH 3 ) 2 ] 4 [Zn 3 (HBDPO) 2 (SO 4 ) 2 ]} n ( 2 ), were successfully synthesized based on Co II and Zn II inorganic nodes with the same bridging organic ligand (H 4 BDPO). Compound 1 possesses a relatively high BET surface area (∼1014 m 2 g –1 ) with multiple pore systems and basic catalytic centers to be applied as an efficient heterogeneous catalyst. The resultant 2 exhibits a 3D structure based on Zn(COO) 4 and Zn 2 (SO 4 ) 2 (COO) 2 as inorganic secondary building units. Thanks to its luminescence property, 2 is able to be considered as a platform for a recyclable biresponsive luminescence sensor for explosives and antibiotics via luminescence quenching effect. The high selectivity of 2,4,6-trinitrophenol can be estimated by the K sv value of ∼1.2 × 10 4 M –1 . Significantly, 2 can efficiently detect nitrofurantoin and nitrofurazone, and the corresponding K sv values are 4.5 × 10 4 and 4.9 × 10 4 M –1, respectively.