大型纯无机铈稳定/桥连硒钨酸盐的组装：从纳米团簇到层状结构
Assembly of large purely inorganic Ce-stabilized/bridged selenotungstates: from nanoclusters to layers.
作者信息
Chen Wei-Chao, Qin Chao, Li Yang-Guang, Zang Hong-Ying, Shao Kui-Zhan, Su Zhong-Min, Wang En-Bo
机构信息
Institute of Functional Materials Chemistry, Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Changchun 130024 (P. R. China).
出版信息
Chem Asian J. 2015 May;10(5):1184-91. doi: 10.1002/asia.201500004. Epub 2015 Feb 25.
A versatile one-pot strategy was used to synthesize two large, purely inorganic selenotungstates, nanocluster K(6)Na(16) [Ce(6)Se(6)W(67)O(230) (OH)(6) (H(2)O)(17)]⋅47 H(2)O (1) and layer K(9)Na(5) Ce(H(2)O)(4) [Ce(6)Se(10)W(51)O(187) (OH)(7) (H(2)O)(18)]⋅45H(2)O(2), by combining cerium centers and SeO(3) (2-) heteroanion templates. Compound 1 displays a Ce-stabilized hexameric nanocluster with one rhombus-like {W(4)O(15) (OH)(3)} unit in the center, whereas compound 2 is the first example of a Ce-bridged layer selenotungstate network based on linkage of the unusual {Ce(6)Se(10)W(51)O(187) (OH)(7) (H(2)O)(18)} clusters and additional Ce(H(2)O)(4) fragments via Ce-O-Se bridges. The compounds were characterized by elemental analyses, IR spectroscopy, thermogravimetric analyses, powder and single-crystal X-ray diffraction, and electrospray ionization mass spectrometry. Moreover, the electrochemical property of compound 1 was also investigated.
采用一种通用的一锅法策略，通过结合铈中心和SeO₃²⁻杂阴离子模板，合成了两种大型纯无机硒钨酸盐，即纳米簇K₆Na₁₆[Ce₆Se₆W₆₇O₂₃₀(OH)₆(H₂O)₁₇]⋅47 H₂O (1)和层状K₉Na₅Ce(H₂O)₄[Ce₆Se₁₀W₅₁O₁₈₇(OH)₇(H₂O)₁₈]⋅45H₂O(2)。化合物1展示了一种由铈稳定的六聚体纳米簇，其中心有一个菱形的{W₄O₁₅(OH)₃}单元，而化合物2是基于不寻常的{Ce₆Se₁₀W₅₁O₁₈₇(OH)₇(H₂O)₁₈}簇通过Ce-O-Se桥与额外的Ce(H₂O)₄片段相连的铈桥连层状硒钨酸盐网络的首个例子。通过元素分析、红外光谱、热重分析、粉末和单晶X射线衍射以及电喷雾电离质谱对这些化合物进行了表征。此外，还研究了化合物1的电化学性质。
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