Complex Formation of Cu2+ with Poly(vinyl alcohol) in Strongly Basic Solution as Studied by ESR
1988 Volume 1988 Issue 2 Pages 209-211
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1988 Volume 1988 Issue 2 Pages 209-211
It has been revealed by ESR studies that complexation of Cu2+ with deprotonated OH groups of PVA occurs in aqueous Cu2+-PVA solutions at pH13, forming a gummy precipitate. The inclusion-type complex of Cu(OH)2-PVA produces [Cu(OH)4]2- by the addition of NaOH in the same degree of reactivity as Cu(OH)2 alone, and the above complexation takes place between the resulting [Cu(OH)4]2- species and PVA, all the three Cu species being kept at equilibrium.
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