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首页> 外文期刊>Catalysis science & technology >Initiator-free hydrocarbon oxidation using supported gold nanoparticles
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Initiator-free hydrocarbon oxidation using supported gold nanoparticles

机译：使用支持的金纳米颗粒的无引发剂烃氧化

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The oxidation of cyclic alkenes (cyclopentene, cyclohexene, cycloheptene and cyclooctene) has been carried out under green solvent-free conditions using ambient air as the oxidant gas with a carbon-supported gold catalyst. We show that radical initiators are only required for this reaction when the cyclic alkene contains a stabilizer molecule, such as 6-bis(t-butyl)-4-methylphenol (BHT) or 3-octadecyl-(3,5-di-t-butyl-4-hydroxyphenyt)-propanoate (irganox 1076). We show that either removing the stabilizer chemically or sourcing the cycloalkane without the stabilizer the oxidation, both with and without radical initiator, is identical. This indicates that the only function of the radical initiator is to counteract the stabilizer. We have extended this work to show that stabilizer-free internal linear alkenes can be effectively epoxidised with air using the carbon-supported gold catalyst. However, unfortunately linear a-alkenes still require the addition of an initiator to achieve reaction. This work demonstrates that removal of a sacrificial reagent from a reaction is possible which adheres to the principles of green chemistry.
机译：在无环境空气作为氧化气中，在无绿色溶剂条件下在无绿色溶剂条件下进行了环环烷烃（环戊烯，环己烯，环己烯和环烯烯）的氧化。 We show that radical initiators are only required for this reaction when the cyclic alkene contains a stabilizer molecule, such as 6-bis(t-butyl)-4-methylphenol (BHT) or 3-octadecyl-(3,5-di-t -butyl-4-羟基苯基） - 丙酸酯（Irganox 1076）。我们表明，要么化学去除稳定剂，要么在没有稳定剂的情况下采购环烷烷，无论带有和没有自由基引发剂，氧化都是相同的。这表明自由基引发剂的唯一功能是抵消稳定剂。我们已经扩展了这项工作，以表明可以使用碳支持的金催化剂有效地用空气将无稳定器内线性烯烃有效化。但是，不幸的是，线性A-Alkenes仍然需要添加引发剂才能实现反应。这项工作表明，可以从反应中去除牺牲试剂，从而遵循绿色化学原理。

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