A palladium(II)‐coordinated covalent organic framework (Pd(II)@COF) was mechanochemically synthesized from [2,2′‐bipyridine]‐5,5′‐diamine (Bpy) and 1,3,5‐triformylphloroglucinol (Tp), which was demonstrated as a catalyst for conjugate addition of arylboronic acids to unreactive α,β‐unsaturated carboxylic acids in aqueous media (water/acetone = 1:1). Modest to good yields were obtained for most substrates, and studies on the catalyst recyclability showed that the heterogeneous catalyst gave >80% yields in the first 4 cycles. This research broadens the application of COFs supported catalysis and gave a new option for Pd(II)‐catalysis.

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In our research, the terpolymerization of CO 2 and epoxides was realized and the poly(carbonate-ether)diols were successfully synthesized by the catalysis of Salen-metal complex with the non-nucleophilic anion, in which the alternated polycarbonate is generally produced. The poly(carbonate-ether)diols with M n s between 1100 and 8100 g mol À1 and carbonate units (CU) between 31.3% and 52.9% were obtained by tuning temperature, CO 2 pressure, time and water addition. Especially the oligo(carbonate-ether)diols with M n s below 2000 g mol À1and CU over 40% could be obtained, which were ideal starting materials for polyurethane synthesis and novel CO 2 -based polymers with high potential. K E Y W O R D SCO 2 -based materials, poly(carbonate-ether)diols, Salen-cobalt complexes