C–C Coupling Reactions Catalyzed by Gold Nanoparticles: Evidence for Substrate-Mediated Leaching of Surface Atoms Using Localized Surface Plasmon Resonance Spectroscopy

C–C Coupling Reactions Catalyzed by Gold Nanoparticles: Evidence for Substrate-Mediated Leaching of Surface Atoms Using Localized Surface Plasmon Resonance Spectroscopy
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金纳米粒子催化的 C–C 偶联反应:使用局域表面等离子共振光谱进行基质介导的表面原子浸出的证据

DOI:
10.1021/acs.jpcc.8b12453
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发表时间:
2019
期刊:
The Journal of Physical Chemistry C
影响因子:
--
通讯作者:
Andiappan, Marimuthu
Andiappan, Marimuthu
中科院分区:
--
文献类型:
--
作者:
Mohammadparast, Farshid;Dadgar, Andishaeh P.;Tirumala, Ravi Teja;Mohammad, Sayeed;Topal, C. Ozge;Kalkan, A. Kaan;Andiappan, Marimuthu

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非均相金属纳米催化剂最近成为各种偶联催化剂(例如,C-C, C-N, C-S, C-O等)。然而,催化途径的表征仍然具有挑战性。通过利用与催化相关的金(Au)纳米结构的局部表面等离子体共振(LSPR),我们证明了紫外可见光谱可以用来确认均相催化途径。具体来说,我们已经证明了在C-C偶联条件下,金纳米颗粒经过底物诱导浸出形成均匀的金催化物质。LSPR光谱方法为跟踪纳米催化剂的稳定性和表征一系列偶联反应的催化途径打开了一扇新的大门。
Heterogeneous metal nanocatalysts have recently emerged as attractive catalysts for a variety of couplings (e.g., C–C, C–N, C–S, C–O, etc.). However, the characterization of the catalytic pathway remains challenging. By exploiting localized surface plasmon resonance (LSPR) of the catalytically relevant gold (Au) nanostructure, we show that UV–vis spectroscopy can be used to confirm the homogeneous catalytic pathway. Specifically, we have demonstrated that Au nanoparticles under C–C coupling conditions undergo substrate-induced leaching to form homogeneous Au catalytic species. The LSPR spectroscopic approach opens a new door to track stability of nanocatalysts and characterize the catalytic pathway in a range of coupling reactions.
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DOI: --
发表时间: 2016
期刊:
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