New Methods for the Preparation Nanosized Metal Coordination Polymers

Abstract

Transition-metal coordination polymers [M(ndc) (bpy)Á(H 2 O)m]ÁxH 2 O (where M = Co(II), Ni(II), Cu(II)and Zn(II), ndc = 1,4-naphthalenedicarboxylate, bpy = 4,4 0 -bipyridine; m = 0 or 1; x = 1 or 2) were prepared by reacting the ligands and metal ions at room temperature with the aid of microwave irradiation and sonication methods. The structure of the coordination polymers was assigned based on elemental analysis, FT-IR and electronic spectral studies, thermal analysis, scanning electron microscope and X-ray powder diffraction. Thermogravimetric analysis was also used to follow up the possible thermal decomposition steps and to calculate the thermodynamic parameters of the nano-sized metal complexes. The kinetic parameters were calculated making use of the Coats-Redfern and Horowitz-Metzger equations. All obtained results of the different technics used in our study stated the ability to synthesis the metal coordination polymers of our interest using both microwave irradiation and sonication methods.