Binary and ternary copper(II) complexes with NIPAAm/IA copolymers and aminoacids: Interpretation of UV-visible spectra and cyclic voltammograms

Candan Erbil*, Argun Talat G̈kçeören, Esma Sezer

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: ???type-name???Makalebilirkişi

1 Atıf (Scopus)

Özet

The complex formations of homopolymers and copolymers of poly(N-isopropyl acrylamide) (PNIPAAm), polyacrylamide (PAAm) and poly(itaconic acid) (PIA) with Cu(II) ions in aqueous solutions were studied by using UV-visible spectra in the region of 200-1100nm and cyclic voltammograms between -0.800V and 0.600V. According to the optical and electrochemical spectra of the polymer- and copolymer-Cu(II) complexes and their ternary complexes with alanine, i.e., absorptions and the shifts in the wavelength of the maximum absorptions, currents and potentials of the peaks in the pH range of 3-12, the intensities of anodic and cathodic peak currents of polymers containing IA groups decrease with increasing pH and they show maximum absorptions at lower wavelengths than do the homopolymers used in this work. The peak point of the visible band shifts from 800 to 650nm, with increasing pH, while the intensity of the third anodic peak observed after pH=4 increases in the case of both Ala-Cu(II) and its ternary solution with P(NIPAAm-co-IA, 9.8mol%). Both the pH-dependent shifts of maximum absorptions and the appearence of the third anodic peaks as the pH raised were interpreted as a presence of tetracoordinated Cu(II) complexes in the solution and on the electrode surface, involving combined carboxyl, amide and amine interaction.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)525-534
Sayfa sayısı10
DergiJournal of Macromolecular Science - Pure and Applied Chemistry
Hacim44
Basın numarası5
DOI'lar
Yayın durumuYayınlandı - May 2007

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