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Behavior of Co^{2+} Cations in the Aqueous and Alcoholic Solution of CoCl_2·6H_2O

100%
Petkova P., Nedkov V.
Acta Physica Polonica A
|
2013
|
vol. 123
|
issue 2
207-208
EN
We investigated the optical properties of Co^{2+} cations in the aqueous and alcoholic solution of CoCl_2·6H_2O at room temperature. We measured the absorption spectra of these solutions in the spectral region 395-800 nm. The Racah parameters and the exchange integrals of the aqueous complex [Co(H_2O)_6]^{2+} are calculated. The parameters D_{t} and D_{s} are also calculated on the basis of our experimental data. The parameters δ σ and δπ which are connected with the symmetry of this complex are also determined.
2
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Urbach's Rule in Undoped and Co Doped (80-x)Sb_2O_3-20Na_2O-xWO_3 Glasses

81%
Petkova P., Soltani M., Petkov S., Nedkov V.
Acta Physica Polonica A
|
2012
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vol. 121
|
issue 1
152-154
EN
We have analyzed the Co influence on the absorption spectra of (80-x)Sb_2O_3-20Na_2O-xWO_3 glasses in the Urbach rule region at room temperature. We present the comparison between Co and WO_3 manifestation in the spectral region 2.64-3.14 eV. The spectral characteristics of "crystalline" and "glassy" Urbach's rule are also calculated.
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