1. CTAS
  2. All Volumes and Issues
  3. Volume 5, Number 2
  4. RESEARCH OF COMPLEX FORMATION OF POLYETHYLENIMINE WITH COPPER (II), NICKEL (II), COBALT (II) IONS.

RESEARCH OF COMPLEX FORMATION OF POLYETHYLENIMINE WITH COPPER (II), NICKEL (II), COBALT (II) IONS.

CTAS.
2022;
Volume 5, Number 2
: 16-23
https://doi.org/10.23939/ctas2022.02.016
Authors:
  1. Lilianna Oliynyk
  2. Oksana Makota
  3. Zoryana Komarenska
  4. S. I. Gerasimchuk
1
Lviv Polytechnic National University
2
Lviv Polytechnic National University
3
Lviv Polytechnic National University
4
Lviv Polytechnic National University

There is described the influence of polyethylenimine globule structure on complexation with copper (II), nickel (II) and cobalt (II) ions. There are determined the values of the coordination number with the change of the pH of the solution for the complexes of ethylenediamine, diethylenetriamine and polyethylenimine with metal ions. It is investigated that the complexation of these metal ions with low molecular weight amines passes through three stages and with PEI through two stages. It is shown that the content of free nitrogen atoms in PEI, which do not react with metal ions, increases with increasing concentration of PEI in solution. The number of monomer units associated with metal ions depends on the size of the globule of the macromolecule, as well as the reaction process. The complexation reaction in solution is determined by the diffusion of metal ions into the polymer globule. If the reaction takes place in a diffusion field at a low polymer concentration, the rate of complexation is proportional to the concentration of macromolecules and the concentration of metal ions in solution.

polyethylenimine; metal ions; complex formation; polyamines; metal-polymer complexes; polymer globule
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