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Plasmonic Scissors for Molecular Design

机译:用于分子设计的等离子剪刀

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Heterogeneous catalysts play an important role in surface catalytic reactions, but selective bond breaking and control of reaction products in catalytic processes remain significant challenges. High-vacuum tip-enhanced Raman spectroscopy (HV-TERS) is one of the best candidates to realize surface catalytic reactions. Herein, HV-TERS was employed in a new method to control dissociation by using hot electrons, generated from plasmon decay, as plasmonic scissors. In this method, the N=N bond in 4,4'-dimercaptoazobenzene was selectively dissociated by plasmonic scissors, and the reaction products formed from the radical fragment (SC_6H_5N) were controlled by varying the pH value. Under acidic conditions, p-aminothiophenol was produced from the radical fragment by attachment of hydrogen ions, whereas under alkaline conditions, 4-nitrobenzenethiol was obtained by attachment of oxygen ions to the substrate.
机译:非均相催化剂在表面催化反应中起重要作用,但是在催化过程中选择性键断裂和反应产物的控制仍然是重大挑战。高真空尖端增强拉曼光谱(HV-TERS)是实现表面催化反应的最佳候选者之一。在本文中,HV-TERS被用在一种新方法中,该方法通过使用由等离子体激元衰减产生的热电子作为等离子体激元剪刀来控制解离。在该方法中,通过等离激元剪刀选择性地分离4,4'-二巯基偶氮苯中的N = N键,并通过改变pH值来控制由自由基片段(SC_6H_5N)形成的反应产物。在酸性条件下,通过氢离子的附着从自由基片段中生成对氨基苯硫酚,而在碱性条件下,通过将氧离子附着在底物上获得4-硝基苯硫醇。

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