posted on 2023-11-15, 21:08authored byYiying Pang, Bowei Wang, Xiaoyi Gu, Huawei Shen, Xilong Yan, Yang Li, Ligong Chen
The cycloaddition of CO2 with epoxides to
cyclic carbonates
is one of the most promising and green pathways for CO2 utilization, and the development of highly efficient catalysts remains
a challenge. In this work, a novel hydroxy-rich covalent organic framework
(TFPB-DHBD-COF) was synthesized, and it served as an efficient heterogeneous
catalyst for the reaction of CO2 with 1,2-epoxybutane under
mild conditions, providing the desired products in 90% conversion.
The abundant hydroxy groups in the pore channels of TFPB-DHBD-COF
could not only activate epoxides and CO2 via hydrogen bonding
but also obviously enhance its stability through intramolecular five-membered
ring hydrogen bonding. Thus, this COF also exhibited outstanding stability
and tolerance for diverse substrates. Undoubtedly, this work has enriched
the application of tailored COFs in the activation and utilization
of CO2.