Exploring the System Lanthanide/Succinate in the Formation of Porous Metal-Organic Frameworks: Experimental and Theoretical Study

Exploring the Ln/succinate system and the template effect in hydrothermal synthesis made it possible to obtain [La-2(Succ)(3)(H2O)(3)].2H(2)O and [Ln(2)(Succ)(3)(H2O)(2)] where Ln = La, Pr, Nd, Sm, Eu, Gd, and Tb. The first case is a 2D network with a sql plane net topology. The 3D supramolecular network is formed by strong hydrogen bonds, which give rise to a pcu network. In the second case, a family of 3D compounds with a bnn topology could be synthesized. Both compounds can be obtained in the presence of 5-sulfosalicylate (5-SSA(3)) as a template agent, and the presence of toluene in the reaction enables formation only of [Ln(2)(Succ)(3)(H2O)(2)] compounds. This paper addresses a systematic synthetic and theoretical study of the formation equilibrium of the molecules reported. The influence of the template agent on the formation of porous MOFs and the luminescent behavior are addressed.