Two novel metal–organic frameworks constructed by pyridinyl-derived and carboxylate mixed ligands for photocatalytic dye degradation

Abstract

A new rigid bipyridinyl-derived ligand has been utilized for the fabrication of two metal–organic frameworks, denoted as [M(L)(mipa)]_n [M = Zn (1) and Cd (2), L = 2,6-bis((E)-4-(pyridine-3-yl)benzylidene)cyclohexanone, H₂mipa = 5-methylisophthelic acid], through solvothermal synthesis by using a mixed-ligand strategy. Structural analysis reveals that these isomorphic compounds display a 3,5-connected two-dimensional network with an unprecedented (4²·6⁷·8)(4²·6) topology. Both of them exhibit certain chemical stability and thermal stability. Notably, the photocatalytic properties of the two compounds for the degradation of several organic dyes have been explored.