高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (9): 1339.

• 论文 • 上一篇    下一篇

稀土硼酸盐的结构及其真空紫外(VUV)荧光性质

杨智1,2, 任敏1, 林建华1, 苏勉曾1, 陶冶3, 王渭3   

  1. 1. 北京大学稀土材料化学及应用国家重点实验室, 材料化学系, 北京100871;
    2. 云南师范大学化学系, 昆明 650092;
    3. 中国科学院高能物理研究所同步辐射实验室, 北京 100039
  • 收稿日期:1999-08-05 出版日期:2000-09-24 发布日期:2000-09-24
  • 通讯作者: 林建华(1955年出生),男,博士,教授,主要从事无机材料化学研究.
  • 基金资助:

    国家自然科学基金(批准号:29625101和29971002);国家重点基础研究规划项目(973项目);国家杰出青年基金;云南省教育

The Crystal Structure and VUV Luminescent Property of the Rare Earth Borates

YANG Zhi1,2, REN Min1, LIN Jian-Hua1, SU Mian-Zeng1, TAO Ye3, WANG Wei3   

  1. 1. State Key Laboratoryof Rare Earth Materials Chemistryand Applications, Department of Materials Chemistry, Peking University, Beijing 100871, China;
    2. Department of Chemistry, Yunnan Normal University, Kunming 650092, China;
    3. Beijing Synchrotron Radiation Laboratory, Instituteof High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
  • Received:1999-08-05 Online:2000-09-24 Published:2000-09-24

摘要: 稀土硼酸盐在真空紫外(VUV)波段的吸收与化合物中硼酸根离子的结构有关,扩展Hückel计算表明,硼酸根离子中的B—O成键轨道与B—O反键轨道能量差按BO45->B2O54->BO33->B3O99-顺序减小,这与VUV激发光谱的实验结果一致,表明VUV激发过程对应于电子从B—O成键轨道向反键轨道的跃迁.

关键词: 稀土硼酸盐, 真空紫外, 激发光谱

Abstract: The VUVabsorption of rare earth borates depends strongly on the structure of the borate ions. It is proposed from the simple extended Hückel calculation that the excitation transition in the VUVrange is mainly from the B—O bonding orbital(HOMO) to the antibonding orbital(LUMO). The energy difference between the HOMOand LUMOdecreases in the sequence of BO45->B2O54->BO33->B3O99-, which accords with the VUVexperimental results.

Key words: Rare earth borates, VUV, Excitation spectra

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