Germanium Compounds Containing GeE Double Bonds (E = S, Se, Te) as Single-Source Precursors for Germanium Chalcogenide Materials
datasetposted on 2017-03-22, 13:06 authored by Hyo-Suk Kim, Eun Ae Jung, Seong Ho Han, Jeong Hwan Han, Bo Keun Park, Chang Gyoun Kim, Taek-Mo Chung
New germanium chalcogenide precursors, SGe(dmamp)2 (3), SGe(dmampS)2 (4), SeGe(dmamp)2 (5), SeGe(dmampS)2 (6), TeGe(dmamp)2 (7), and TeGe(dmampS)2 (8), were synthesized from Ge(dmamp)2 (1) and Ge(dmampS)2 (2) using sulfur, selenium, and tellurium powders (dmamp = 1-dimethylamino-2-methyl-2-propanolate, dmampS = 1-dimethylamino-2-methylpropane-2-thiolate). Complexes 1 and 2 were synthesized from metathesis reactions of GeCl2·dioxane with 2 equiv of aminoalkoxide or aminothiolate ligands. Thermogravimetric analysis of complex 1 displayed good thermal stability and volatility. The molecular structures of complexes 2–8 from X-ray single crystallography showed distorted trigonal bipyramidal geometry at the germanium centers. Germanium chalcogenide materials (GeSe and GeTe) were obtained from the thermal decomposition of complexes 5, 6, and 8 in hexadecane. X-ray diffraction patterns exhibited that GeSe and GeTe had orthorhombic and rhombohedral phases, respectively. This study affords a facile method to easily prepare germanium chalcogenide materials using well-designed and stable complexes by thermal decomposition of single-source precursors in solution.
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Germanium Chalcogenide Materials New germanium chalcogenide precursors1- dimethylamino -2-methylpropane Complexes 1germanium chalcogenide materialsGeTedecompositionGermanium chalcogenide materialscomplexes 5tellurium powders2 equivaminothiolate ligands1- dimethylamino -2-methyl dmampSrhombohedral phasesSeSingle-Source PrecursorsTeX-ray diffraction patternsgermanium centersGeSesingle-source precursorsmetathesis reactionsThermogravimetric analysisbipyramidal geometry