PROMOTING ACCESS TO AFRICAN RESEARCH

Bulletin of the Chemical Society of Ethiopia

Log in or Register to get access to full text downloads.

Remember me or Register



Synthesis and characterization of thermally stable oligomer-metal complexes of copper(II), nickel(II), zinc(II) and cobalt(II) derived from oligo-p- nitrophenylazomethinephenol

Ufuk S. Vural, Hasan Mart, H. Okkes Demir, Ozlem Sarıöz, Vefa Muradoğlu, M. Cihangir Koç

Abstract


Thermally stable metal complexes based on oligomers were prepared by the reaction between oligo-p-nitrophenilazomethinephenol (ONPAP) and Cu(II), Ni(II), Zn(II) and Co(II) ions. The properties of oligomer-metal complexes were studied by elemental, FT-IR and magnetic moments analyses. The thermal stabilities of the oligomer-metal complexes were compared by thermogravimetric (TG) and differential thermal (DTA) analyses. According to TG, oligomer-metal complexes were stable against to temperature and thermooxidative decomposition. The weight losses of oligomer-metal complexes were found to be 5 and 50 % at 200 and > 850 (Cu(II)), 172 and 600 (Ni(II)), 252 and > 850 (Zn(II)) and 174 and 510 (Co(II)), oC, respectively. Based on half degradation temperature parameters Cu(II) and Zn(II) complexes were more resistant than the others.

KEY WORDS: Oligomer metal complexes, Oligo-p-nitrophenilazomethinephenol, Cu(II) complex, Ni(II) complex, Zn(II) complex, Co(II) complex
Bull. Chem. Soc. Ethiop. 2006, 20(2), 219-226.



http://dx.doi.org/10.4314/bcse.v20i2.21164
AJOL African Journals Online