Journal of the American Chemical Society
Journal of the American Chemical Society
5 years ago

Uncoordinated Amine Groups of Metal–Organic Frameworks to Anchor Single Ru Sites as Chemoselective Catalysts toward the Hydrogenation of Quinoline

Uncoordinated Amine Groups of Metal–Organic Frameworks to Anchor Single Ru Sites as Chemoselective Catalysts toward the Hydrogenation of Quinoline
Yu Wang, Lirong Zheng, Yue Lin, Zhaoxiang Deng, Dongsheng He, Tao Yao, Xin Wang, Yadong Li, Yuen Wu, Xiaoqian Wang, Xusheng Zheng, Juncai Dong, Lei Zhang, Wei Liu, Jian Yang, Zhijun Li, Huanxin Ju, Wensheng Yan, Wenxing Chen
Here we report a precise control of isolated single ruthenium site supported on nitrogen-doped porous carbon (Ru SAs/N–C) through a coordination-assisted strategy. This synthesis is based on the utilization of strong coordination between Ru3+ and the free amine groups (−NH2) at the skeleton of a metal–organic framework, which plays a critical role to access the atomically isolated dispersion of Ru sites. Without the assistance of the amino groups, the Ru precursor is prone to aggregation during the pyrolysis process, resulting in the formation of Ru clusters. The atomic dispersion of Ru on N-doped carbon can be verified by the spherical aberration correction electron microscopy and X-ray absorption fine structure measurements. Most importantly, this single Ru sites with single-mind N coordination can serve as a semihomogeneous catalyst to catalyze effectively chemoselective hydrogenation of functionalized quinolones.

Publisher URL: http://dx.doi.org/10.1021/jacs.7b01686

DOI: 10.1021/jacs.7b01686

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