Syntheses and characterization of 3D heterometallic (3d-4f) metal-organic frameworks: Reversible de- and rehydration performance and magnetic properties

By the metalloligand strategy, two new 3d-4f heterometallic metal-organic frameworks (MOFs), {[Ln(2)Cu(3)(IDA)(6)] center dot 1.5H(2)O}(n) [Ln = Tb (1) and Dy (2); H(2)IDA = iminodiacetate acid], had been prepared. X- ray crystal structure analyses show that 1 and 2 possess of 3D frameworks with highly ordered 1D channels along the c axis. The highly stable skeleton and reversible de- and rehydration performance of 1 are demonstrated by thermogravimetric and powder X-ray diffraction analyses, and a low temperature magnetic study of 2 reveals a weak ferromagnetic interaction between the metal ions. (C) 2009 Elsevier B. V. All rights reserved.