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首页> 外文期刊>Langmuir: The ACS Journal of Surfaces and Colloids >Hydride abstraction initiated hydrosilylation of terminal alkenes and alkynes on porous silicon
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Hydride abstraction initiated hydrosilylation of terminal alkenes and alkynes on porous silicon

机译:氢化物抽象引发了多孔硅上末端烯烃和炔烃的氢化硅烷化

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摘要

Hydride abstraction by triphenylcarbenium cations in the presence of terminal alkynes and alkenes results in hydrosilylation at room temperature on hydride-terminated porous silicon surfaces, leading to alkenyl- and alkyl-terminated surfaces, respectively. A wide range of surface terminations are possible as the reaction conditions tolerate a variety of functional groups. Silicon-carbon bond formation is substantiated by Fourier transform infrared and C-13 solid-state NMR spectroscopies, in addition to chemical and stability studies. Generation of an energetic surface silicon-based positive charge is thus a viable route to the formation of silicon-carbon bonds via hydrosilylation, a step previously postulated for the mechanism of exciton-mediated hydrosilylation on photoluminescent nanocrystalline silicon. [References: 47]
机译:在末端炔烃和烯烃的存在下,三苯碳鎓阳离子氢化物的提取导致氢化物封端的多孔硅表面在室温下发生氢化硅烷化,分别导致烯基和烷基封端的表面。由于反应条件可耐受多种官能团,因此可能存在多种表面终止反应。除了化学和稳定性研究以外,傅立叶变换红外光谱和C-13固态NMR光谱证实了硅碳键的形成。因此,基于硅的高能表面正电荷的产生是经由氢化硅烷化形成硅-碳键的可行途径,该步骤先前被假定为在光致发光纳米晶体硅上激子介导的氢化硅烷化机理的步骤。 [参考:47]

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