A new porous 2D coordination polymer built by copper(II) and trimesic acid

A 2D porous material, Cu3(tmen)3(tma)2 (H2O)2 · 6.5H2O [tmen = N,N,N′,N′-tetramethylethane-1,2-diamine; tmaH3 = 1,3,5-benzenetricarboxylic acid/trimesic acid], has been synthesized and characterized by X-ray single crystal analysis, variable temperature magnetic measurements, IR spectra and XRPD pattern. Upon heating, the lattice water molecules get eliminated without destroying the crystal morphology and the compound rehydrated reversibly on exposure to humid atmosphere. Magnetic data of the complex have been fitted considering isolated irregular Cu3 triangles by applying the clumag program. The best fit shows three close comparable J parameters, indicating very weak antiferromagnetic interactions between the metal centers.