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Download fileGermanium Compounds Containing GeE Double Bonds (E = S, Se, Te) as Single-Source Precursors for Germanium Chalcogenide Materials
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posted 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 ChungNew
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
