New Properties and Characteristics of Mixed Ligand Coordination Polymers Derived from Transition Metal Ions, 1,2,4,5-Benzenetetracarboxylate and Aromatic Diamines
Aref A. M. Aly, Asma I. El-Said, R. Gabr, Rasel. A. Mukred
Chemical Science International Journal · pp. 144–157 · Published 4 Mar 2015
10.9734/ACSJ/2015/15754Abstract
Coordination polymers derived from 1,2,4,5-benzenetetracarboxylate (H2btec2- or btec4- ), Fe(II), Mn(II), Co(II), Ni(II), Cu(II), Cd(II) or UO2(II) metal ions, 1,10-phenanthroline(1,10-phen) or 2,2'-bipyridine(2,2'-bipy) were prepared. The polymers were characterized by elemental analysis, IR and electronic spectra, electrical conductance, magnetic susceptibility measurements and thermal behavior. The electronic spectra, magnetic susceptibility measurements and X-ray structure determination revealed octahedral and tetrahedral geometries around the metal ions. Kinetic and thermodynamic parameters of the thermal decomposition were computed from the thermal data using the Coats-Redfern equation. From the X-ray powder diffraction the particle sizes (6.4-25.4 nm) of the coordination polymers could be calculated using the Scherrer`s equation.
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