高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (2): 199.

• 研究论文 •    下一篇

γ-[SiW10O36]8-夹心型稀土元素单取代多酸化合物的合成与表征

岳斌, 江磊, 孔祖萍, 焦锋, 林欣荣, 金松林   

  1. 复旦大学化学系, 上海 200433
  • 收稿日期:2003-04-23 出版日期:2004-02-24 发布日期:2004-02-24
  • 通讯作者: 岳 斌(1966年出生),男,博士,副教授,从事丰产元素化学研究.E-mail;yuebin@fudan.edu.cn E-mail:yuebin@fudan.edu.cn
  • 基金资助:

    国家自然科学基金(批准号;20371013)资助

Synthesis and Characterization of Sandwich Rare Earth Metal Mono-substituted Polyoxometalates with γ-[SiW10O36]8- as Ligand

YUE Bin, JIANG Lei, KONG Zu-Ping, JIAO Feng, LIN Xin-Rong, JIN Song-Lin   

  1. Department of Chemistry, Fudan University, Shanghai 200433, China
  • Received:2003-04-23 Online:2004-02-24 Published:2004-02-24

摘要: 利用缺位填充法合成了12个γ-[SiW10O36]8-夹心型稀土元素单取代多酸化合物K13[Ln(SiW10O36)2]·nH2O(Ln=La3+,Ce3+,Pr3+,Nd3+,Sm3+,Eu3+,Gd3+,Tb3+,Dy3+,Ho3+,Er3+,Yb3+).通过元素分析确定其组成,由红外光谱、紫外-可见吸收光谱、循环伏安及室温磁化率测定结果确认稀土离子与γ-[SiW10O36]8-相配位;183WNMR及荧光光谱结果则表明,稀土离子处于2个γ-[SiW10O36]8-构成的八配位环境中,标题化合物具有夹心型D2d对称性结构.

关键词: 稀土元素, 两缺位&gamma, -Keggin配体, 夹心结构

Abstract: Twelve rare earth metal mono-substituted polyoxometalates, K13[Ln(γ-SiW10O36)2]·nH2O(Ln=La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+, Ho3+, Er3+, Yb3+), were synthesized by vacant sites-filling method by using γ- [SiW10O36]8- as the ligand. The compounds were characterized by elemental analysis, UV-Vis absorption spectra, IR spectra, CV, paramagnetic measurement, fluorescence spectra and 183W NMR. These results indicate that the rare earth metal ion is coordinated with eight terminal oxygen atoms of two γ- [SiW10O36]8- ligands with D2d symmetry and the title compounds have 1;2 sandwich structure.

Key words: Rare earth metal, Di-vacant γ-Keggin type ligand, Sandwich structure

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