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Polymer complexes. LXXI. Spectroscopic studies, thermal properties, DNA binding and antimicrobial activity of polymer complexes
Author(s) -
Diab M.A.,
ElSonbati A.Z.,
Morgan Sh.M.,
ElMogazy M.A.
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4378
Subject(s) - chemistry , hydrazone , monomer , polymer , magnetic susceptibility , metal , crystallography , metal ions in aqueous solution , polymer chemistry , inorganic chemistry , stereochemistry , nuclear chemistry , organic chemistry
Polymer complexes of Co(II), Ni(II), Mn(II), Cr(III) and Cd(II) were prepared by the reaction of 3‐allyl‐5‐[(4‐nitrophenylazo)]‐2‐thioxothiazolidine‐4‐one (HL) with metal ions. The structure of polymer complexes was characterized by elemental analysis, IR, UV–Vis spectra, X‐ray diffraction analysis, magnetic susceptibility, conductivity measurements and thermal analysis. Reaction of HL with Co(II), Ni(II), Mn(II), Cr(III) and Cd(II) ions (acetate or chloride) give polymer complexes ( 1–5 ) with general stoichiometric [M(L)(O 2 CCH 3 )(H 2 O) 2 ] n (where L = anionic of HL and M = Co(II) (1) or Ni(II) (2) ), [Mn(HL) 2 (OCOCH 3 ) 2 ] n (3) , [Cr(L) 2 (Cl)(H 2 O)] n (4) and [Cd(HL)(O 2 CCH 3 ) 2 ] n (5) . The value of HOMO–LUMO energy gap (ΔE) for forms (A‐C) of monomer (HL) is 2.529, 2.296 and 2.235 eV, respectively. According to ΔE value, compound has minimum ΔE is the more stable, so keto hydrazone form (C) is more stable than the other forms (azo keto form (A), azo enol form (B)). The interaction between HL, polymer complexes of Co(II), Ni(II), Mn(II), Cr(III) and Cd(II) with Calf thymus DNA showed hypochromism effect. The HL and its polymer complexes were tested against some bacterial and fungal species. The results showed that the Cr(III) polymer complex (4) has more antibacterial activity than HL and polymer complexes (1–3 and 5) against Bacillus subtilis , Staphylococcus aureus and Salmonella typhimurium .