Abstract
New metal-organic frameworks (MOF) with lanthanum(III), cerium(III), neodymium(III), europium(III), gadolinium(III), dysprosium(III), and holmium(III)] and the ligand precursor 1,3,5-tris(4-carboxyphenyl)-2,4,6-trimethylbenzene (H3L) were synthesized under solvothermal conditions. Single crystal x-ray analysis confirmed the formation of three-dimensional frameworks of [LnL(H2O)2]n·xDMF·yH2O for Ln = La, Ce, and Nd. From the nitrogen sorption experiments, the compounds showed permanent porosity with Brunauer-Emmett-Teller (BET) surface areas of about 400 m2/g, and thermal stability up to 500 °C. Further investigations showed that these Ln-MOFs exhibit catalytic activity, paving the way for potential applications within the field of catalysis.
Highlights
Metal-organic frameworks (MOFs) form a class of porous materials that have been intensively studied in the last decade [1,2,3,4,5,6]
MOFs designed with these ligands exhibit properties and functions that are attractive to researchers due to their rigidity and trifunctional identity [26,27,28]
The aim of this work was the synthesis of new MOFs with the tribasic tricarboxylate H3 L ligand (MTBA) and the investigation of their physicochemical properties, crystal structures, thermal, and luminescence properties
Summary
Metal-organic frameworks (MOFs) form a class of porous materials that have been intensively studied in the last decade [1,2,3,4,5,6]. MOFs are of interest [21,22,23] as microporous materials in gas/solvent sorption applications due to their high porosity and tunable pore structure. Amongst the intensely studied carboxylate ligands is 1,3,5-benzenetricarboxylate, the trianion of trimesic acid (TMA) [24,25]. Extended derivatives of TMA, namely 1,3,5-benzenetribenzoic acid (BTBA) and mesitylenetribenzoic acid (MTBA) are exploited as organic spacers in MOFs (see Figure 1). The three methyl groups in MTBA induce steric hindrance and lead to a structure in which the three carboxylate groups are almost
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