Potentiometric Study and Biological Activity of Some Metal Ion Complexes of Polyvinyl Alcohol (PVA)

The acid-base equilibrium of polyvinyl alcohol (PVA) is investigated. The stability constant values of the binary complexes between PVA and metal ions Cu(II), Co(II), Ni(II) and Zn(II) formed in solution were investigated potentiometrically. The relationships between the properties of the studied ce...

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Bibliographic Details
Published in:International journal of electrochemical science 2013-01, Vol.8 (1), p.1520-1533
Main Authors: Hosny, Wafaa M., Khalaf-Alaa, Perihan A.
Format: Article
Language:English
Subjects:
Antimicrobial activities
IR spectra
Metal complexes
Polyvinyl alcohol(PVA)
Potentiometry
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Summary:The acid-base equilibrium of polyvinyl alcohol (PVA) is investigated. The stability constant values of the binary complexes between PVA and metal ions Cu(II), Co(II), Ni(II) and Zn(II) formed in solution were investigated potentiometrically. The relationships between the properties of the studied central metal ions as ionic radius, electronegativity, atomic number, and ionization potential of the formed complexes were investigated and give information about the nature of chemical bonding in complexes and make possible the calculation of unknown stability constants. CuII and NiII complexes with PVA are isolated as solid complexes and characterized by chemical and physical methods, and their general formula [ML.nH2O]2H2O, where M = CuII and NiII, L = PVA, and n = 2 and 4 for CuII and NiII respectively. The ligand and their metal chelates have been screened for their antimicrobial activities using the disc diffusion method against the selected bacteria and fungi.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)14116-2