Metal-organic frameworks bonded with metal N-heterocyclic carbenes for efficient catalysis |
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Authors: | Chang He Jun Liang Yu-Huang Zou Jun-Dong Yi Yuan-Biao Huang Rong Cao |
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Institution: | State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;University, of Chinese Academy of Sciences, Beijing 100049, China;Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China |
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Abstract: | Metal N-heterocyclic carbenes (M-NHCs) on the pore walls of a porous metal-organic framework (MOF) can be used as active sites for efficient organic catalysis. Traditional approaches that need strong alkaline reagents or insoluble Ag2O are not, however, suitable for the incorporation of NHCs on the backbones of MOFs because such reagents could destroy their frameworks or result in low reactivity. Accordingly, development of facile strategies toward functional MOFs with covalently bound M-NHCs for catalysis is needed. Herein, we describe the development of a general and facile approach to preparing MOFs with covalently linked active M-NHC (M = Pd, Ir) single-site catalysts by using a soluble Ag salt AgOC(CF3)3 as the source and subsequent transmetalation. The well-defined M-NHC-MOF (M = Pd, Ir) catalysts obtained in this way have shown excellent catalytic activity and stability in Suzuki reactions and hydrogen transfer reactions. This provides a general and facile strategy for anchoring functional M-NHC single-site catalysts onto functionalized MOFs for different reactions. |
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Keywords: | metal-organic framework N-heterocyclic carbene MIL-101 Suzuki reaction transfer hydrogenation |
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