Pd(OAc)2/P-COF: a phosphine-based COF supported palladium-salt heterogeneous catalyst for Suzuki-Miyaura coupling reactions at ambient conditions

A new type of phosphine covalent organic frameworks (P-COFs) has garnered interest because of their high specific surface area and good thermal stability. These microporous materials have potential applications in gas storage, separation, heterogeneous catalysis, and other fields. Here, we present a heterogeneous catalyst consisting of a phosphine-based COF supported by palladium salt (Pd(OAc)2/P-COF) for Suzuki-Miyaura coupling reactions. The electron-rich heteroatoms (P, N) can securely anchor the active component (Pd) within the walls of P-COF. This catalyst exhibits excellent catalytic activity and cyclic stability. The coupling yield of phenylboronic acid and chlorobenzene with low activity reaches 100% at room temperature for 3 h. After five cycles, the coupling yield of bromobenzene and phenylboronic acid remains above 93%.