Crystal structure of [Al4(OH)6(H2O)12][Al(H2O)6]2Br12: a new polyaluminum compound.
Crystal structure of [Al4(OH)6(H2O)12][Al(H2O)6]2Br12: a new polyaluminum compound.
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DOI：
10.1021/ic2002749
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发表时间：
2011-09
影响因子：
4.6
通讯作者：
Zhong Sun;Hui Wang;Huijun Feng;Ying Zhang;Shuangyan Du
中科院分区：
文献类型：
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作者：
Zhong Sun;Hui Wang;Huijun Feng;Ying Zhang;Shuangyan Du
在[Al（4）（OH）（6）（H（2）O）（12）][Al（H（2）O）（6）]（2）Br（12）中观察到顶点共享的四面体[Al（4）（OH）（6）（H（2）O）（12）]（6+）（Al（4））和无序的[Al（H（2）O）（6）]（3+）（Al（1））以1：2的比例共存于每个晶胞中。前者由四个AlO（6）八面体组成，它们通过共享每个八面体的三个顶点而相互连接，形成一个具有理想T（d）对称性的大的正四面体。后者的中心Al（3+）离子与6个无序的OH（2）分子配位，形成具有理想D（3d）对称性的核壳结构。
A vertex-shared tetrahedral [Al(4)(OH)(6)(H(2)O)(12)](6+) (Al(4)) and a disordered [Al(H(2)O)(6)](3+) (Al(1)) that coexist in a 1:2 ratio within each unit cell were observed in the structure of [Al(4)(OH)(6)(H(2)O)(12)][Al(H(2)O)(6)](2)Br(12), which crystallized in a cubic Fd3m space group from a spontaneously hydrolyzed solution of AlBr(3). The former is composed of four AlO(6) octahedra that are connected to each other by sharing three vertexes of each octahedron and form a large regular tetrahedron with ideal T(d) symmetry. The central Al(3+) ion of the latter is coordinated by 6 disordered OH(2) molecules, that form a core-shell structure with ideal D(3d) symmetry.