Syntheses, structures, luminescent and catalytic properties of two 3D metal-organic frameworks

Two new 3D Zn(II)/Pb(II)-based MOFs, {[Zn 9 (mbpdc) 7 (3,3′-dmbpy) 2 ( μ 3 -OH) 4 ]·(H 2 O) 5 } n ( 1 ), and {[Pb 11 (mbpdc) 7 (μ 4 -O) 3 ( μ 3 -OH) 2 ]·(H 2 O)} n ( 2 ) ((H 2 mbpdc = 2-methyl-4,4′-biphenyldicarboxylic acid, 3,3′-dmbpy = 3,3′-dimethyl-4,4′-bipyridine) have been synthesized and were structurally characterized. Complex 1 exhibits 3D network with 10-connected ile topology and is comprised of pentanuclear (Zn 5 N 2 O 18 ) units bridged by mbpdc ligands and further pillared by 3,3′-dmbpy struts. Complex 2 is a new 3D lead(II) MOF constructed by dodecanuclear {Pb 12 (COO) 16 ( μ 3 -OH) 2 ( μ 4 -O) 4 } units and mbpdc ligands. Furthermore, the luminescence and the catalytic activities of 1 – 2 for the degradation of methyl orange in a Fenton-like process have also investigated.