[Zurück]

N. Vedeanu, O. Cozar, I. Ardelean, B. Lendl:
"IR and Raman investigation of x(CuO×V2O5)(1-x) [P2O5×CaF2] glass system.";
Journal of Optoelectronics and Advanced Materials, 8 (2006), 1; S. 78 - 81.

X(CuO×V2O5)(1-x)[P2O5×CaF2] glass system with 0 £ x £ 40 mol% were investigated using IR and Raman spectroscopy in order to put in evidence the structural changes induced by the transition metal (TM) oxides (Cu2+ and V4+ ions). Both IR and Raman spectra presents the specific bands for the phosphate network. For x ³ 7 mol% the depolymn. of the phosphate network appears and new short units or ring structural units occur. Non-bridging oxygen atoms are involved in the V-O-P and Cu-O-P bonds. 2D correlation spectroscopy method was also used for the anal. of the structural unit formation in these glasses. Hetero-spectral correlation anal. indicates that between the IR band at 840 cm-1 attributed to V-O-V stretching vibration and Raman band at 710 cm-1 and 1175 cm-1 attributed to P-O-P stretching vibration and PO2 stretching resp. exists a strong correlation. A correlation exist also between the IR band at .apprx. 650 cm-1 attributed to P-O-P sym. stretching and the Raman band at 1175 cm-1 due to the sym. stretching vibration of PO2 group.

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