Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 105, Issue 23, Pages 5368-5373Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp002310+
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Metal complexation of a series of polymeric gels, with different degrees of ionization, prepared from acrylic acid and acryloyl amino acid monomers (CH2=CHCONH(CH2)(n)COOH, where n = 4, 6 and 8), were investigated. The binding of Cu(II) ions to the gels was studied by means of swelling, quantitative determination of the amount of bound or complexed Cu(II), and EPR spectroscopy of Cu(II) complexes. Both the amount of Cu(II) and the structure of polymer-Cu(II) complex were influenced by the length of the pendent chain, i.e., hydrophobicity of the polymer gels. The metal uptake by the gels increases with increasing hydrophobicity. Two types of polymer-Cu(II) complexes (monomer and dimer, respectively) were identified by EPR spectroscopy, their concentrations were found to be a function of hydrophilic-hydrophobic balance of the polymer gels.
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