Abstract Imines are important intermediates in organic synthesis. To avoid derivatives, the research on direct oxidized amines as an alternative method is imminent. The gold (Au)–palladium (Pd) alloy nanoparticles (NPs) catalyst shows a favourable activity and high selectivity on benzylamine oxidation reaction under light irradiation. The yield of the reaction on the alloy NPs with a Au:Pd ratio of 1:1.86 in the dark was 36% at 45 °C, while the yield increased to 95% under light illumination. The study demonstrates different properties from alloy NP to pure Au NP and Pd NP catalysts which may be caused by increased surface charge heterogeneity in the alloy system. The conversion rate of the reaction can also be enhanced by light irradiation and heat. The light energy which utilized by Localized Surface Plasmon Resonance effect of gold in alloy system can highly enhanced the efficiency of reaction. These findings provide useful guidelines for designing efficient alloy catalysts with a plasmonic metal and a catalytically active transition metal for various organic syntheses driven by sunlight. Graphic Abstract

中文翻译：

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室温可见光照射下钯金合金纳米粒子选择性氧化胺合成亚胺

摘要 亚胺是有机合成中重要的中间体。为了避免衍生物，直接氧化胺作为替代方法的研究迫在眉睫。金 (Au)-钯 (Pd) 合金纳米粒子 (NPs) 催化剂在光照射下对苄胺氧化反应显示出良好的活性和高选择性。Au:Pd 比为 1:1.86 的合金 NPs 在 45°C 下的反应产率为 36%，而在光照下产率增加到 95%。该研究证明了合金 NP 到纯 Au NP 和 Pd NP 催化剂的不同性质，这可能是由于合金系统中表面电荷异质性增加所致。光照射和加热也可以提高反应的转化率。金在合金体系中的局域表面等离子体共振效应所利用的光能可大大提高反应效率。这些发现为设计具有等离子体金属和催化活性过渡金属的高效合金催化剂提供了有用的指导，用于由阳光驱动的各种有机合成。图形摘要