利用杂化Cu2O-Pd纳米结构在常温常压下可见光驱动的末端炔的C-C偶联反应
Visible Light-Driven C-C Coupling Reaction of Terminal Alkynes at Atmospheric Temperature and Pressure Reaction Conditions using Hybrid Cu2O-Pd Nanostructures
摘要：
碳-碳（C-C）偶联反应是广泛用于生产精细化学品、农用化学品和药物的反应。在我们最近的贡献（绿色化学，2019，21，5284-5290）中，氧化亚铜（Cu 2 O）纳米球被证明是末端炔（如苯乙炔）的C-C偶联反应的有效催化剂。具体地说，Cu 2 O纳米球被证明成功地催化苯乙炔的氧化C-C偶联反应，形成偶联产物二苯基二乙炔（DPDA）。然而，这些Cu 2 O纳米催化剂需要~110 ℃的相对高的温度。在此，我们报道了基于修饰在Cu 2 O上的混合钯纳米团簇（即，Cu_2 O-Pd）催化剂能利用可见光作为能量输入，在常压反应条件下成功地催化苯乙炔的氧化偶联反应。这是通过比较在存在和不存在可见光下的氧化均偶联反应来显示的。我们的研究结果表明，通过Cu 2 O-Pd纳米球的光催化剂是一个合乎逻辑的替代品，朝着更有效和可持续的工业过程。
英文摘要：
Carbon-carbon (C-C) coupling reactions are widely used reactions in the production of fine chemicals, agrochemicals, and pharmaceuticals. In our recent contribution (Green Chemistry, 2019, 21, 5284-5290), cuprous oxide (Cu2O) nanospheres are shown to be efficient catalysts for C-C coupling reactions of terminal alkynes such as phenylacetylene. Specifically, Cu2O nanospheres are shown to successfully catalyze oxidative C-C homocoupling reaction of phenylacetylene to form a coupling product, diphenyl diacetylene (DPDA). However, these Cu2O nanocatalyst requires a relatively high temperature of ~110 0C. Herein, we report that photocatalysts built on hybrid palladium nanoclusters decorated on Cu2O (i.e., Cu2O-Pd) can utilize visible light as energy input and successfully catalyze oxidative homocoupling of phenylacetylene at atmospheric temperature and pressure reaction condition. This was displayed by the comparison of oxidative homocoupling reactions both in the presence and without the presence of visible light. Our findings indicate that photocatalysts through Cu2O-Pd nanospheres present to be a logical substitute, moving toward more efficient and sustainable industrial processes.
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