Synthesis and characterization of thermally resistant coordination polymers of poly(sulphonediphenyleneterephthalamide)

A series of Schiffs Base coordination polymers was prepared using amino group terminated oligomeric ligand poly(sulphonediphenyleneterephthalamide) (PSDTA) and Co(II), Ni(II), and Cu(II) complexes of salicylaldehyde [M(Sal)(2)] and 2-hydroxy-1-napthaldehyde [M(Napthal)(2)]. The coordination polymers were characterised by IR spectroscopy, elemental analysis, magnetic susceptibility measurements, and thermogravimetric analysis (TGA). Oxygen and nitrogen coordinated structures of coordination polymers have been proposed on the basis of physico-chemical studies. Thermogravimetric analysis showed enhancement in the thermal stability of coordination polymers in comparison to the aramid ligand, PSDTA.