ESR and Optical Absorption Spectra of Copper (II) Ions in Glasses

Glasses in the system 20Na(2)O-Al2O3-13B(2)O(3)-6.3CaO-0.2Sb(2)O(3)-1.5PbO(2)-(58-x)SiO2-xCuO were prepared with x = 0.0. 0.2 0.4, 0.6 and 0.8 mol% respectively. ESR absorption spectra due to Cu2- (3d(9)) ions show that the ESR signal at 0.2 and 0.4 mol%CuO were similarity. the perpendicular g-value, g(perpendicular to) can be observed at 2.06 whereas the parallel g-value,g(//) cannot be observed. The line width of board line centers were depends on the increasing of concentration of CuO-doped. CuO-doped glasses give rise light blue green color. Confirm from optical absorption techniques as UV-VIS measurment reported were recorded at room temperature. The absorption band near 800 nm (2B(1g)-> 2B(2g)) is due to Jahn-Teller effect of Cu2+. Also absorption hand at around 400 nm (2B(1g)-> 2B(2g)) could be found due to d-d transition of Cu2+ ion in the CuO doped glasses. The results obtained suggest that Cu ions substitutes as an accepted center for [SiO2](4+) in oxygen octahedral rhombohedral distortion.