Heterotrimetallic Organic Framework Assembled with FeIII/BaII/NaI and Schiff Base: Structure and Visible Photocatalytic Degradation of Chlorophenols

A porous heterotrimetallic organic framework, [BaNa(FeL)(2)(mu(2)-OH)(H2O)]center dot DMF-2H(2)O (1) [H4L = 1,2-cyclohexanediamino-N,N'-bis(3-methyl-5-carboxysalicylidene)], has been synthesized and characterized. Each Fe-III ion is embedded in the internal [N2O2] pocket of an L4- anion and further bridged by a mu(2)-OH anion to give an (FeL)(2)(mu(2)-OH) dimer. The external carboxylate groups of L4- anions coordinate to Ba-II and Na-I atoms to generate a three-dimensional periodic network. The sorption properties and UV-vis spectrum of 1 have been studied. The photodegradation of 2-chlorophenol (2-CP), 3-CP, and 4-CP by 1 at different pH values under visible light has also been systematically investigated.