A novel 2D metal-organic framework with Lewis basic sites as a heterogeneous base catalysis

A 2D metal-organic framework, [(Nd-2(TATMA)(2)center dot 4DMF center dot 4H(2)O](n) (namely NdTATMA), was successfully assembled from a semi-rigid organic ligand 4,4,4 ''-s-triazine-1,3,5-triyltri-m-aminobenzoate (H(3)TATMA) and Nd(III) ion. NdTATMA has binuclear (Nd-2(COO)(6)} inorganic clusters and completely deprotonated organic ligands. In the topology view, NdTATMA can be simplified as a 3,6-connected kgd topology with the Schlafli symbol of (4(3))(2)(4(6).6(6).8(3)). This resultant sample has been fully characterized by single crystal and powder X-ray diffractions, elemental analysis and thermogravimetric analyses. Due to abound Lewis basic sites in the structure, NdTATMA can be served as a good heterogeneous base catalysis to catalyse Knoevenagel condensation reaction. The resultant sample is able to recycle four times without significant activity decrease. (C) 2017 Elsevier B.V. All rights reserved.