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Porous Organic Phenanthroline‐Based Polymer as an Efficient Transition‐Metal‐Free Heterogeneous Catalyst for Direct Aromatic C−H Activation
Author(s) -
Tang Yongquan,
Chen Fang,
Wang Sai,
Sun Qi,
Meng Xiangju,
Xiao FengShou
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202100288
Subject(s) - catalysis , transition metal , polymer , monomer , phenanthroline , polymerization , polymer chemistry , organic base , heterogeneous catalysis , chemistry , metal organic framework , materials science , electron transfer , chemical engineering , photochemistry , organic chemistry , engineering , adsorption
Direct C−H bond transformation has been regarded as one of the most important areas in organic synthesis in both academia and industry. However, the heterogeneous transition‐metal‐free catalysis of direct C−H bond transformation has remained a contemporary challenge. To tackle this challenge, we designed and constructed a porous phenanthroline‐based polymer (namely POP‐Phen) via free radical polymerization of vinyl‐functionalized phenanthroline monomers. POP‐Phen shows excellent catalytic performances in transition‐metal‐free catalyzed C−H arylation, even better than those of the corresponding homogeneous catalyst, which is mainly attributed to the high density of catalytically active sites in the heterogeneous catalyst. Kinetic isotope experiments and spectral characterizations demonstrate the electron‐transfer between the heterogeneous catalyst and the base ( t ‐BuOK), a key step for C−H activation. We believe that this porous organic phenanthroline polymer could open a new door for the design of novel heterogeneous transition‐metal‐free catalysts for direct C−H activation.