Co-ordination polymers of 7,7 '-[1,4-N,N '-dimethylene piperazinylene]-8-quinolinol (DMPQ)

Attempts have been made to synthesize co-ordination polymers of a new bis o xine bidentate ligand, namely 7,7'-[1,4-N,N'-dimethylene piperazinylene]-8- quinolinol (DMPQ) with different metal ions. The bis bidentate ligand DMPQ polymer is synthesized by a Mannich base reaction of oxine with formaldehyd e and piperazine dihydrochloride in the presence of acid catalyst. The co-o rdination polymers of DMPQ with different metal ions like Cu+2, Zn+2, Co+2, Mg+2, Mn+2 and Cd+2 were prepared and characterized by their elemental ana lysis, IR spectral and magnetic moment studies. The metal content in all th e polymers was found to be consistent with (1:1) metal:ligand stoichiometry . The thermal behaviour of each of these co-ordination polymers has been ex amined by TGA in air up to 600 degrees C temperature. (C) 1999 Elsevier Sci ence Ltd. All rights reserved.