Nanosized Supramolecular Coordination Polymers Derived from Divalent Metal Ions, 4-Pyridylacetate and Auxiliary Ligands Containing Nitrogen and Phosphorus Donors

• Main Authors: Aref A. M. Aly, Asma I. El-Said, Rasel A. Mukred
• Format: Article
• Language: English
• Published: Universidade Federal de Mato Grosso do Sul 2021-03-01
• Series: Orbital: The Electronic Journal of Chemistry
• Subjects: nitrogen and phosphorus ligands; 4-pyridylacetate; metal coordination polymers spectroscopic investigations; thermal investigations
• Online Access: http://orbital.ufms.br/index.php/Chemistry/article/view/1551

<p>A series of coordination polymers of Co(II), Ni(II), Cu(II) or Cd(II) comprising 4-pyridylacetate (pya) and certain auxiliary ligands including benzimidazole (Hbzim), 1,10-phenanthroline (phen), 2,2^'-bipyridine (2,2^'-bipy),  2-amino-4-methylthiazole (A-Mtz), quinazole (Quz), 2,5-dimethylpyrazine (dpmz), bis(diphenylphosphino)methane (dpm), 1,2-bis(diphenylphosphino)ethane (dpe) and 1,3-bis(diphenylphosphino) propane (dpp) were prepared  and characterized by spectroscopic, magnetic and  thermal techniques. In these coordination polymers 4-pyridylacetate coordinates to the metal ions in a monodentate fashion through the carboxylate oxygens and/or the pyridyl nitrogen. Octahedral structures around the metal ions were suggested for all the complexes. The kinetic analyses of the thermal decomposition of the complexes were studied using the Coats-Redfern equation. The kinetic and thermodynamic parameters of the thermal decomposition were also calculated and discussed. From the X-ray powder diffraction data, the crystal parameters as well as the particle sizes (15.7-18.7 nm) of the complexes could be evaluated. Some of the compounds exhibit catalytic activity. The biological activity of the compounds was screened as well.</p><p> </p><p>DOI: <a href="http://dx.doi.org/10.17807/orbital.v13i1.1551">http://dx.doi.org/10.17807/orbital.v13i1.1551</a></p>