节点文献

一种新颖的六帽Keggin型钼钒砷酸盐——（H₃O）₃[AsMo₁₂O₄₀（VO）₆]·6H₂O的水热合成和晶体结构

Hydrothermal Synthesis and Crystal Structure of a Novel Hexacapped Keggin-type Molybdovanadoarsenate （H₃O）₃[AsMo₁₂O₄₀（VO）₆]·6H₂O

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 HAO Na, LI Yang-Guang, SHEN En-Hong, WANG En-Bo , LU Ying, DUAN Ying-Bo(1. Faculty of Chemistry, Northeast Normal University, Changchun 130024, China;2. Northeast General Pharmaceutical Factory, Shenyang 110026, China)

【机构】东北师范大学化学学院；东北制药总厂长春 130024；长春 130024；沈阳 110026；

【摘要】 <正> 近年来,含有Keggin结构的杂多酸以其优异的结构可修饰性及其在催化、功能材料和医药等方面的潜在应用而引起人们广泛的研究兴趣。在这一领域中,众多过渡金属取代的Keggin型杂多化合物,尤其是含有钒和铝的多金属氧酸盐由于其独特的电磁特性及结构特点而倍受关注。但迄今为止,只有少数带帽Keggin型结构的杂多阴离子被报道。这些Keggin阴离子通常具有低的V/Mo更多还原

【Abstract】 A novel molybdovanadoarsenate(H3O)3[AsMo12O4o(VO)6] · 6H2O has been hydrothermally synthesized and structurally characterized by elemental analyses, cerimetric titration, EPR, and single crystal X-ray diffraction. The compound crystallizes in the triclinic system, space group PI with a = 1. 262 9(3) nm, b=1. 263 5(3) nm, c=l. 767 2(4) nm, a=91. 01(3)°, β=89. 98(3)°, 7=90. 00(3)°, V=2. 819 8(10) nm3, Z=2, R1 = 0. 095 5, wR2=0. 178 8. The polyoxoanion exhibits a hexacapped a-Keggin-type structure, in which six (VO5) square pyramids were distributed on the surface of (AsMo12O40) unit and made the bridge-oxygen (Ob, Oc) atoms of the a-Keggin-type polyoxoanion occupied.更多还原