Post-Synthetic Metalation of Robust Hydrogen-Bonded Organic Framework for Heterogeneous Catalysis.

Han B , Wang H , Wang C , Wu H , Zhou W , Chen B , Jiang J
Journal of the American Chemical Society
Hydrogen-bonded organic framework (HOF)-based catalysts still remain unreported thus far due to their relatively weak stability. In the present work, a robust porous HOF (HOF-19) with a Brunauer-Emmett-Teller surface area of 685 m2 g‒1 was reticu-lated from a cage-like building block, amino-substituted bis(tetraoxacalix[2]arene[2]triazine), depending on the hydro-gen bonding with the help of - interactions. The post-synthetic metalation of HOF-19 with palladium acetate afforded a palladium(II)-containing heterogeneous catalyst with hydro-gen-bonded structure retained, which exhibits excellent catalyt-ic performance for Suzuki-Miyaura coupling reaction with the high isolation yields (96~98%), prominent stability, and good selectivity. More importantly, by simple recrystallization, the catalytic activity of deactivated species can be recovered from the isolation yield 46% to 92% for 4-bromobenzonitrile conver-sion at the same conditions, revealing the great application potentials of HOF-based catalysts.

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