Spectroscopic study of UV-VIS electronic transitions of Ni2+ ions in different phases of Sol- Gel process | ||
| journal of kerbala university | ||
| Article 1, Volume 12, Issue 2, June 2016, Pages 34-43 PDF (0 K) | ||
| Author | ||
| Qussay Mohammed Salman | ||
| Abstract | ||
| Allowed and forbidden Electronic transition of Ni2+ ions have been investigated in solution, sol and Xerogel .Two complexes NiCl2.6H2O and Ni(NO3)2.6H2O) have been dissolved in (water and ethanol) and doped in silica matrices using sol-gel technique. The molar ratio of TEOS: H2O: Ethanol which adopted in this study were 1:8:12 of PH value = 1 at 60oC. It is found that up to 150oC the Xerogel samples as well as in sol and solution Ni2+ ions have octahedral symmetry. The Racah parameter (B) and ligand field strength (∆) has been calculated for Ni2+ ions in solution it is found ∆ /B=0.85, while in silica matrices ligand field strength has been increased to be greater than 0.9 .It also found that absorbance peaks also have red shift with increasing draying time . | ||
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