Facile synthesis of ultrathin metal-organic framework nanosheets for Lewis acid catalysis

查看全文 作　　者：Xiaofei [1,2]Zhang;Lin [2]Chang;Zhongjie [2]Yang;Yanan [2]Shi;Chang [1,2]Long;Jianyu [2]Han;Binhao [2]Zhang;Xueying [2]Qiu;Guodong [2]Li;Zhiyong [1,2]Tang

机构地区：[1]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China;[2]CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China

出　　处：《Nano Research》索引2019年第12卷第2期,共4页

基　　金：the National Key Basic Research Program of China (Nos. 2014CB931801 and 2016YFA0200700, Z. Y. T.);National Natural Science Foundation of China (Nos. 21890381, 21721002 and 21475029, Z. Y. T.;21722102, 51672053 and 21303029, G. D. L.);Beijing Natural Science Foundation (No. 2182087, G. D. L.);Frontier Science Key Project of Chinese Academy of Sciences (No. QYZDJ-SSW-SLH038,Z. Y. T.);K. C. Wong Education Foundation (Z. Y T.);Youth Innovation Promotion Association CAS (No. 2016036, G. D. L.). 摘　　要：Ultrathin metalorganic framework (MOF) nanosheets are attracting great interest in catalysis due to their unique and intriguing two-dime nsional (2D) features. Although many progresses have been achieved, it is still highly desirable to develop novel strategies for controllable synthesis of the well-defined ultrathin MOF nanosheets. Herein we report a polyvinylpyrrolidone (PVP)-assisted route to synthesize the ultrathin Ni-MOF nanosheets characteristic of 1.5 nm in thickness, in which PVP is reacted with 2-aminoterephthalic acid (H2BDC-NH2) via formation of C=N bon d, followed by coord inatio n with Ni2+ io ns to form the ultrathi n MOF n anosheets. Impressively, when used in the Kno eve nagel condensation reactions of propane dinitrile with different aldehydes, ultrathin Ni-MOF nanosheets display the significantly enhanced catalytic activity and good stability in respect with the bulk Ni-MOF, mainly owing to the exposed active sites as well as facile mass transfer and diffusion of substrates and products. 关键词：ULTRATHIN NANOSHEET METAL-ORGANIC framework Lewis acid site KNOEVENAGEL CONDENSATION

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Facile synthesis of ultrathin metal-organic framework nanosheets for Lewis acid catalysis

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