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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >From rational design of organometallic precursors to optimized synthesis of core/shell Ge/GeO2 nanoparticles
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From rational design of organometallic precursors to optimized synthesis of core/shell Ge/GeO2 nanoparticles

机译：从合理设计有机金属前体到优化合成核/壳Ge / GeO2纳米颗粒

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摘要

The synthesis of germanium nanoparticles has been carried out, thanks to the design of novel aminoiminate germanium(II) precursors: (ATI) GeZ (with Z = OMe, NPh2, and ATI = N,N'-diisopropyl-aminotroponiminate) and (Am)(2)Ge (Am = N,N'-bis(trimethylsilyl) phenyl amidinate). These complexes were fully characterized by spectroscopic techniques as well as single crystal X-ray diffraction. The thermolysis of both complexes yielded NPs which display similar features that are a Ge/GeO2 core/shell structure with a mean diameter close to 5 nm with a narrow size distribution (<15%). Whereas the high temperatures (>300 degrees C) classically reported in the literature for the preparation of germanium-based NPs were necessary for thermolysis of the complexes (ATI) GeZ, the use of amidinate-based precursors allows the preparation at an unprecedented low temperature (160 degrees C) for the thermolytic route. As suggested by a mechanistic study, the lower reactivity of (ATI) GeZ (for which the concomitant use of high temperature and acidic reagent is required) was explained in terms of lower ring strain compared to the case of (Am)(2)Ge.
机译：锗纳米颗粒的合成已经完成，这要归功于新型氨基化锗（II）前体的设计：（ATI）GeZ（其中Z = OMe，NPh2，而ATI = N，N'-二异丙基-氨基对苯二酸酯）和（Am ）（2）Ge（Am = N，N'-双（三甲基甲硅烷基）苯基mid酰胺）。这些配合物已通过光谱技术以及单晶X射线衍射得到了充分表征。两种配合物的热解均产生具有类似特征的NP，即NP / GeO2核/壳结构，平均直径接近5 nm，尺寸分布窄（<15％）。尽管文献中经典报道的高温（> 300摄氏度）对于锗基纳米粒子的制备对于复合物（ATI）GeZ的热解是必不可少的，但使用mid酰胺基前体却可以在前所未有的低温下进行制备（160摄氏度）进行热解。正如机械研究所建议的那样，与（Am）（2）Ge相比，（ATI）GeZ的较低反应性是通过较低的环应变来解释的（需要同时使用高温和酸性试剂）。 。

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