高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (10): 1620.

• 研究论文 • 上一篇    下一篇

KMgF3:Eu,X(X=Ce,Cr,Gd,Cu)体系中Eu2+振动光谱和共掺离子的格位取代

苏海全, 贾志宏, 石春山   

  1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室, 长春 130022
  • 收稿日期:2000-09-26 出版日期:2001-10-24 发布日期:2001-10-24
  • 通讯作者: 石春山(1939年出生),男,研究员,博士生导师,从事稀土固体化学和新材料研究.
  • 基金资助:

    国家重点基础研究发展规划项目(批准号:G1998061323)资助课题

Vibronic Transitions and Site Substitution of Eu2+ and Codoped Ions in KMgF3:Eu-X (X=Ce, Cr, Gd, Cu) System

SU Hai-Quan, JIA Zhi-Hong, SHI Chun-Shan   

  1. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2000-09-26 Online:2001-10-24 Published:2001-10-24

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摘要： 测定了一系列单掺杂Eu2+和双掺杂Eu,X(X=Ce,Cr,Gd,Cu)的KMgF3晶体在300K和77K的高分辨发射光谱以及伴随的振动光谱,据此研究了Eu2+在这些体系中的振动跃迁特征,并指认了每一振动峰所对应的正则振动模式.

关键词: 振动光谱, 发射光谱, KMgF3, 格位取代

Abstract: The higHResolution emission spectra of KMgF3:Eu and KMgF3:Eu-X(X=Ce, Cr, Gd, Cu) single crystals were measured at 300 and 77 K. The vibronic side bands of Eu2+ were characterized and an assignment of the normal mode frequencies to particular vibrations has been made. The correlation between the vibronic frequencies of Eu2+ and the site substitution of other co-doped ions was first found. The relationship between vibronic intensity of Eu2+ and other doped ions concentration showed that Cr3+, Gd3+ ions competed K+ sites with Eu2+ ions. Ce3+ and Eu3+ occurred the electron transference. The introduction of Cu+ made for Eu2+ substuting for K+ sites.

Key words: Vibronic spectrum, Emission spectrum, KMgF3, Displacement site

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