Mesostructured Metal Germanium Sulfides
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Abstract
A new class of mesostructured metal germanium sulfide materials has been prepared and characterized. The synthesis, via supramolecular assembly of well-defined germanium sulfide anionic cluster precursors and transition-metal cations in formamide, represents a new strategy for the formation of this class of solids. A variety of techniques were employed to examine the structure and composition of the materials. Structurally, the material is best described as a periodic mesostructured metal sulfide-based coordination framework akin to periodic hexagonal mesoporous silica, MCM-41. At the molecular scale, the materials strongly resemble microstructured metal germanium sulfides, in which the structure of the [Ge4S10]4- cluster building-blocks are intact and linked via μ-S−M−S bonds. Evidence for a metal−metal bond in mesostructured Cu/Ge4S10 is also provided.
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