Abstrato

Nano-sized metal 1,3-di(4-pyridyl)propane coordination polymer prepared via the surface layer-by-layer chemical depositionmethod

Aref A.M.Aly, Maged S.Al-Fakeh, Mahmoud A.Ghandour

Five new metal coordination polymers of the general formula {[M(DPP)(H2O)mX].xH2O}n, (M=Mn(II),Co(II),Cu(II),Cd(II) and Pb(II),m = 0 or 2, X = Cl- or NO- 3, x = 2 or 5, DPP = 1,3-di(4-pyridyl) propane have been prepared by the thin film surface layer-by-layer chemical deposition reaction. The coordination polymers have been characterized based on elemental analysis, FT-IR and electronic spectral studies, thermal analysis, X-ray powder diffraction and biological activity. Thermogravimetry(TG), derivative thermogravimetry (DTG) and differential thermal analysis (DTA) have been used to study the thermal decomposition steps. The kinetic parameters have been calculated making use of the Coats-Redfern and Horowitz-Metzger equations. The scanning electron microscope (SEM) measurements and the calculations on the powder XRD data indicate the nano-sized nature of the prepared supramolecular coordination polymers. The oxides CuO and PbO nano-particles were characterized by X-ray diffraction (XRD), (SEM) and (TEM) (average particle size 19-36 nm).