New copper (II) complexes of polyampholytes or polyelectrolytes polymers: solid-state NMR, FTIR, XRD and thermal analysis

LÁZARO MARTÍNEZ, JUAN M.; CHATTAH, ANA KARINA; MONTI, GUSTAVO A.; LEAL DENIS, MARÍA F.; BULDAIN, GRACIELA Y.; CAMPO DALL´ORTO, VIVIANA

ELSEVIER SCI LTD

Año: 2008 vol. 49 p. 5482 - 5482

ovel solid copper(II) complexes were obtained from the polyampholyte poly(EGDE?MAA?IM) and the polyelectrolyte poly(EGDE?MAA) polymers with copper salts at different concentration levels. The materials were characterized employing solid-state Nuclear Magnetic Resonance (NMR), Fourier Transform infrared (FTIR), X-ray powder diffraction (XRPD), differential scanning calorimetry (DSC) and thermogravimetry (TG). The reticulation induced by MAA in these materials against the poly(EGDE?IM) gel was analyzed by DSC. The coordination behavior of the carboxylic acid of MAA, compared to that provided by the imidazole ring, was studied through solid-state 13C NMR and changes in the FTIR spectra. The non-homogenous character of the doped and undoped materials was analyzed by the glass transition temperature (Tg), 2D 1H?13C WISE NMR and proton spin?lattice relaxation time in the rotating frame (TH1r). In particular, the TH1r and TH1 values in the complexes decreased with the Cu(II) concentratio