Near-monodisperse tetrahedral rhodium nanoparticles on charcoal: The shape-dependent catalytic hydrogenation of arenes
Near-monodisperse tetrahedral rhodium nanoparticles on charcoal: The shape-dependent catalytic hydrogenation of arenes
复制标题
DOI：
10.1002/anie.200603961
复制
发表时间：
2007-01-01
影响因子：
16.6
通讯作者：
Son, Seung Uk
中科院分区：
文献类型：
--
作者：
Park, Kang Hyun;Jang, Kwonho;Son, Seung Uk
木炭上装载的过渡金属是各种有机转化的有用试剂。此外，这些非均相体系是很有前途的工业催化剂。例如，市售的Pd/C在实验室中经常用于脱苯、加氢和CÀC成键反应，也用于工业，[1]和Ni/C、[2]Cu/C、[3]和Co/C[4]最近分别被开发为偶联、硅氢化和环加成反应的催化剂。商业上可用的Rh/C在广泛的有机反应中表现出优异的催化活性，包括氢化、氢甲酰化、氢羰基化和芳基卤化物的还原偶联，[5]和大量的努力旨在提高该试剂的效率。例如，更好的固体支撑，如纳米多孔碳和层状粘土，已经被开发出来最近，Wai和Koningsberger小组已经证明碳纳米管和纳米纤维由于其增强的分散能力是更好的支撑离子液体也被用作铑的有希望的载体；该配合物在苯加氢反应中表现出良好的稳定性和催化活性
Transition metals loaded on charcoal are useful reagents for a wide variety of organic transformations. Moreover, these heterogeneous systems are promising industrial catalysts. For example, commercially available Pd/C is frequently used in debenzylation, hydrogenation, and CÀC bond-formation reactions in the laboratory and is also used in industry,[1] and Ni/C,[2] Cu/C,[3] and Co/C [4] have recently been developed as catalysts for coupling, hydrosilylation, and cycloaddition reactions, respectively.Commercially available Rh/C shows excellent catalytic activity in a broad range of organic reactions, including hydrogenation, hydroformylation, hydrocarbonylation, and reductive coupling of aryl halides,[5] and considerable effort has been aimed at enhancing the efficiency of this reagent. For instance, better solid supports, such as nanoporous carbon and layered clays, have been developed.[6] Recently, the Wai and Koningsberger groups have shown that carbon nanotubes and nanofibers are better supports owing to their enhanced dispersion ability.[7] An ionic liquid has also been used as a promising support for rhodium; the resulting complex showed good stability and catalytic activity in the hydrogenation of benzene.[8]