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首页> 外文期刊>RSC Advances >Catalysed stereodivergent hydrosilylation with Onium Salts stabilised M(0) nanocatalysts prepared in scCO(2)
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Catalysed stereodivergent hydrosilylation with Onium Salts stabilised M(0) nanocatalysts prepared in scCO(2)

机译：洋葱盐催化的立体发散氢化硅烷化稳定scCO（2）中制备的M（0）纳米催化剂。

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摘要

M(0) nanocatalysts stabilised in Onium Salt were synthesised using an original preparation and their effectiveness in catalysing the challenging selective sterodivergent alkyne hydrosilylation reaction was studied. Four metal based nanocrystals, namely Pt, Ir, Rh and Ru stabilised by three Onium Salts (quaternary ammonium salts with different anions and cations), were successfully prepared by supercritical CO2 assisted synthesis. The Onium Salts with three different structures were chosen considering their effect on nanocrystals morphology and surface properties but without interference in the selectivity towards hydrosilylation reaction. It was found that the stereochemical outcome can be adjusted either by varying the metal but preserving the same Onium Salt stabilizer, or varying the metal NCs surface properties by changing the stabilizer structure.
机译：使用原始制剂合成了在鎓盐中稳定的M（0）纳米催化剂，并研究了其在催化具有挑战性的选择性立体发散炔烃氢化反应中的有效性。通过超临界CO2辅助合成成功地制备了由三种鎓盐（具有不同阴离子和阳离子的季铵盐）稳定的四种基于金属的纳米晶体，即Pt，Ir，Rh和Ru。选择具有三种不同结构的鎓盐时要考虑它们对纳米晶体形态和表面性质的影响，但不影响氢化硅烷化反应的选择性。发现可以通过改变金属但保留相同的鎓盐稳定剂来调节立体化学结果，或者可以通过改变稳定剂的结构来改变金属NC的表面性质。

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