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Dual-site N-oxidation engineering enables modulated polarization in covalent organic frameworks for efficient
Hao Luo1, Hao Wang1, Shiyuan Wei1
1Hunan Provincial Key Laboratory of Micro and Nano Material Interface, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China. jianhanhuang@csu.edu.cn.
None:
N-Oxidation of imine linkages and pyridine moieties in pyridine-based covalent organic frameworks induces dual-site polarization. Due to the optimized polarization density and plentiful N+-O- polar units, TFPyB-O-COF exhibits an exceptional NH3 production rate of 519.8 µmol g-1 h-1 for photocatalytic N2 reduction, which is proposed to proceed via an alternating association mechanism.
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