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首页> 外文期刊>Catalysis science & technology >Surprisingly high sensitivity of copper nanoparticles toward coordinating ligands: consequences for the hydride reduction of benzaldehyde
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Surprisingly high sensitivity of copper nanoparticles toward coordinating ligands: consequences for the hydride reduction of benzaldehyde

机译：令人惊讶的是铜的高灵敏度纳米粒子对协调配体:后果的氢化还原苯甲醛

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摘要

Functionalized copper nanoparticles are widely used as catalysts; however, identification of the catalytically active species remains a challenge. In this study we investigate hydride-assisted reduction reactions with special focus on the structural evolution of copper nanoparticles in the presence of phosphine and nitrogen-based ligands. These compounds are commonly used as stabilizing agents, and therefore are important in the context of other catalytic reactions as well. In particular, we investigate the case of tri-n-butylphosphine. Our findings show that ultrasmall nano-objects are formed as key intermediates to produce catalytically active species in the hydrosilylation of benzaldehyde into the corresponding silyl alcohol. Moreover, we found that the strength of the hydride donor is essential for the formation of the active catalysts. Therefore, this work unveils the previously overlooked high sensitivity of copper nanoparticles toward coordinating ligands in the context of catalysis.
机译：功能化铜纳米粒子广泛用作催化剂;催化地活跃的物种仍然是一个挑战。在这项研究中我们调查hydride-assisted还原反应与特别关注构造演化的铜纳米颗粒磷化氢和硝基的存在配体。稳定剂,因此是很重要的在其他方面的催化反应好。tri-n-butylphosphine。超微nano-objects形成的关键中间体生产催化地活跃物种的氢化硅烷化苯甲醛到相应的甲硅烷基醇。我们发现氢化捐赠者的强度对于积极的形成是至关重要的催化剂。以前被忽视的高灵敏度的铜纳米粒子对协调配体环境催化。

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