用于碳碳双键偶联和烃类合成的可调层状微孔和介孔中的级联反应
Cascade Reactions in Tunable Lamellar Micro- and Mesopores for C=C Bond Coupling and Hydrocarbon Synthesis.
作者信息
Lin Fan, Zhang Junyan, Liu Dongxia, Chin Ya-Huei Cathy
机构信息
Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S 3E5, Canada.
Department of Chemical and Biomolecular Engineering, University of Maryland, 4418 Stadium Drive, College Park, MD, 20742, USA.
出版信息
Angew Chem Int Ed Engl. 2018 Sep 24;57(39):12886-12890. doi: 10.1002/anie.201803929. Epub 2018 Aug 19.
Two-dimensional MFI zeolite nanosheets contain Brønsted acid sites partially confined at the intercept between micro- and mesopores. These acid sites exhibit exceptional reactivities and stabilities for C=C bond coupling and ring-closure reactions that transform light aldehydes to aromatics. These sites are much more effective than those confined within the micropores of MFI crystallites and those unconfined on H SiW O clusters or mesoporous aluminosilicate Al-MCM-41. The partially confined site environment solvates and stabilizes the transition states of the kinetically relevant steps during aromatization.
二维MFI沸石纳米片含有部分局限于微孔和介孔截面上的布朗斯台德酸位点。这些酸位点在将轻质醛转化为芳烃的C=C键偶联和环化反应中表现出卓越的反应活性和稳定性。这些位点比局限于MFI微晶微孔内的位点以及未局限于H₄SiW₁₂O₄₀簇或介孔硅铝酸盐Al-MCM-41上的位点更有效。部分局限的位点环境使芳构化过程中动力学相关步骤的过渡态溶剂化并使其稳定。
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