Triangles and tetrahedra: metal directed self-assembly of metallo-supramolecular structures incorporating bis-beta-diketonato ligands.
Triangles and tetrahedra: metal directed self-assembly of metallo-supramolecular structures incorporating bis-beta-diketonato ligands.
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三角形和四面体：包含双-β-二酮配体的金属超分子结构的金属定向自组装。
DOI：
10.1039/b403673e
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发表时间：
2004
影响因子：
4
通讯作者：
John C. McMurtrie
中科院分区：
文献类型：
--
作者：
J. Clegg;L. Lindoy;B. Moubaraki;K. Murray;John C. McMurtrie
已经研究了六种芳基连接的双-β-二酮（包括一种新的亚萘基连接物质）与铜（II）、铁（III）以及在一种情况下镓（III）的相互作用，目的是获得表现出不同几何形状的金属超分子组装体。生成了包含上述双-β-二酮 (L) 的两种组装类型的新示例。第一种类型由一系列分子三角形表示，分子式为 [Cu(3)(L-H(2))(3)]（溶剂）(n)，而第二种类型由相应选择的不太常见的中性分子四面体给出，分子式为 [Fe(4)(L-H(2))(6)]（溶剂）(n) 以及[Ga(4)(L-H(2))(6)].8.5THF.0.5H(2)O;每种类型的一个例子都已通过 X 射线晶体学进行了表征。报道了[Fe(4)(-H(2))(6)].6THF 的磁化学研究。磁化率类似于居里，并且与铁(III) d(5)（高自旋）中心之间发生的非常弱的耦合一致。两个三核铜 (II) 以及一个四核铁 (III) 和一个四核镓 (III) 组件的 X 射线结构分别证实了它们离散的三角形和四面体几何形状。镓(III)物质的结构与相应的铁(III)物质的结构密切相关。四面体结构提供了这种封装客体溶剂分子的组装的罕见例子——在每种情况下，四氢呋喃都被纳入到中心空腔中。
The interaction of six aryl-linked bis-beta-diketones, including a new naphthylene linked species, with copper(II), iron(III) and, in one instance gallium(III), has been investigated with the aim of obtaining metallo-supramolecular assemblies exhibiting different geometries. New examples of two assembly types incorporating the above bis-beta-diketones (L) were generated. The first type is represented by a range of molecular triangles of formula [Cu(3)(L-H(2))(3)](solvent)(n) while the second is given by a corresponding selection of less-common neutral molecular tetrahedra of formula [Fe(4)(L-H(2))(6)](solvent)(n) as well as [Ga(4)(L-H(2))(6)].8.5THF.0.5H(2)O; an example of each type has been characterised by X-ray crystallography. A magnetochemical investigation of [Fe(4)(-H(2))(6)].6THF is reported. The susceptibility is Curie like and consistent with very weak coupling occurring between the iron(III) d(5)(high spin) centres. The X-ray structures of two trinuclear copper(II) as well as a tetranuclear iron(III) and a tetranuclear gallium(III) assembly confirm their discrete triangular and tetrahedral geometries, respectively. The structure of the gallium(III) species is closely related to that of the corresponding iron(III) species. The tetrahedral structures provide rare examples of such assemblies encapsulating guest solvent molecules--in each case tetrahydrofuran is incorporated in the central cavity.