Local Symmetry of Cu²⁺Ions in Sodium Silicate Glasses from Data of EPR Spectroscopy

The effect of Alkali Type on the Optical Behavior of Cu Doped Borate Glass Bandpass Filter

“…(6). The obtained spectra show main signal band around magnetic field of order 3300 (Gauss) corresponding to presence the copper on the divalent forms [38,39]. This data are good agreement with optical data, which exhibit green color for the prepared samples.…”

Effect of alkaline earths on spectroscopic and structural properties of Cu2+ ions-doped lithium borate glasses

“…2B 1g → 2A 1g , 2B 1g → 2B 2g , and 2B 1g → 2E g are expected. But in this case a single broad absorption band has been observed which is assigned to the 2B 1g → 2B 2g transition of Cu 2+ ions [24][25][26].…”

“…The 2T 2g level splits into 2B 2g and 2E g levels. This causes predominantly an elongated octahedral coordination with four short in plane bond lengths and long axial bond lengths [24,25]. Accordingly three transitions i.e.…”

The effect of copper ions addition on structural and optical properties of zinc borate glasses

“…The free ion term for Cu 2 + ion (3d 9 ) is 2 D. In a ligand field of octahedral symmetry the 2 D ground state splits into the e g and t 2g states. However, as the ground state for Cu 2 + ions in an octahedral ligand field is e g , tetragonal splitting due to Jahn-Teller distortion will occur and the e g level splits to 2 B 1g and 2 A 1g and the t 2g level to 2 B 2g and 2 E g levels [38,39] [19,38]. The broadening of this band can be due to the overlap of all the three transitions.…”