CONDUCTIVITY, LUMINESCENCE AND VIBRATIONAL STUDIES OF THE POLY(ETHYLENE GLYCOL)-400 ELECTROLYTE BASED ON EUROPIUM TRICHLORIDE

Poly(ethylene glycol) 400/(EuCl3)(x) electrolytic complexes with 0 les s than or equal to x less than or equal to 0.327 were prepared. The io nic conductivity of these systems was investigated, and the data were satisfactorily well fitted by the empirical Vogel-Tamman-Fulcher equat ion. Two different conductivity regions depending on the electrolytic complexes compositions were observed. The conformation of the poly(eth ylene glycol) 400 (PEG 400) in the complexes was investigated by FT-IR and Raman spectroscopies. These investigations suggest that the PEG 4 00 chains in PEG 400/(EuCl3)(x) present a TGT conformation (T = trans, G = gauche). Moreover, by laser luminescence spectroscopy it was also proved that each Eu3+ ion is coordinated by four oxygen atoms of PEG in a distorted C-2v site symmetry.