Germanium sulfides, mesostructured

First Synthesis of Mesostructured Hexagonal Germanium Sulfides Using Gemini Surfactants... 

Non-aqueous synthetic methods have recently been used to assemble mesoporous transition metal oxides and sulfides. This approach may afford greater control over the condensation-polymerization chemistry of precursor species and lead to enhanced surface area materials and well ordered structures [38, 39], For the first time, a rational synthesis of mesostructured metal germanium sulfides from the co-assembly of adamantanoid [Ge4S ()]4 cluster precursors was reported [38], Formamide was used as a solvent to co-assemble surfactant and adamantanoid clusters, while M2+/1+ transition metal ions were used to link the clusters (see Fig. 2.2). This produced exceptionally well-ordered mesostructured metal germanium sulfide materials, which could find application in detoxification of heavy metals, sensing of sulfurous vapors and the formation of semiconductor quantum anti-dot devices. 

Ozin etal. subsequently prepared hexagonal mesostructured germanium sulfides by using low-valent metal cations such as Co +, Ni +, Cu+, and Zn + to connect [Ge4Sio] clus-... 

Similar to germanium sulfides or selenides, [Sn4Seio] adamantine clusters also exist and have been found to form mesostructured semiconductors with Pt + when templated by the lyotropic liquid-crystalline phase of alkylpyridinium surfactant [Ci6H33NC5H5]Br. This mesophase designated as CiePyPtSnSe has a band gap of 1.5 eV. 

Maclachlan MJ, Coombs N, Ozin GA (1999) Ntm-aqueous supramolecular assembly of mesostructured metal germanium sulfides from (Ge4Sio) clusters. Nature 397 681 84... 

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