Synthesis, characterization and chelating properties of poly [azo-(6-hydroxy-1,3-phenylene)]

Poly azo(6-hydroxy-1,3-phenylene)] (PAHP) was prepared by alcoholic alkaline reduction of 2,4-dinitro phenol (DNP). The polymers prepared at various time intervals were characterized by elemental analyses, IR spectra and thermogravimetric analysis. The number average molecular weight was determined by non-aqueous titration. Viscometric study in DMF of all the three polymers were carried out and indicates polyelectrolyte behaviour. Viscometric study in DMF-water (85:15)(v/v) containing 1%KBr shows normal behaviour. Polymeric metal chelates of Cu²⁺, Ni²⁺, Co²⁺, Zn²⁺, Mn²⁺ and Cr²⁺ with PAHP polymer were prepared and characterized.