Temperature and Ligand Effects on the Ho(Ⅲ) Absorption Spectra in Aqueous Solution

수용액에서의 Ho(III) 착물의 흡수 스펙트럼에 영향을 미치는 온도 및 리간드 효과에 관한 연구

  • Mi Kyeong Kim (Department of Chemistry, Korea University) ;
  • Wha-Jin Han (Department of Chemistry, Korea University) ;
  • Seung Jun Jeon (Department of Chemistry, Korea University) ;
  • Keon Kim (Department of Chemistry, Korea University)
  • 김미경 (고려대학교 이과대학 화학과) ;
  • 한화진 (고려대학교 이과대학 화학과) ;
  • 전승준 (고려대학교 이과대힉 화학과) ;
  • 김건 (고려대학교 이과대학 화학과)
  • Published : 1992.12.20

Abstract

Absorption spectra were observed for several Ho(III)-ligand systems in aqueous solution under the changes of ligand concentration and temperature. The intensity change of hypersensitive band $(^5I_8\;\to\;^5G_6)$ was quite remarkable with temperature and concentration, and was interpreted as the change of coordination environments. The transition intensities observed in these spectra were analyzed in terms of the Judd-Ofelt intensity parameters, $\Omega_\lambda$ ($\lambda$ = 2, 4, 6), for 4f $\to$ 4f electric dipole transitions. The $\Omega_2$ parameter was the most sensitive to the temperature and concentration. Using the changes of $\Omega_2$, $Cl^-$ and ${NO_3}^-$ ions were found to form inner sphere complexes in aqueous solution.

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