Hollow porous organic nanospheres for anchoring Pd(PPh₃)₄ through a co-hyper-crosslinking mediated self-assembly strategy

In this work, we present a facile method for anchoring a transition metal catalyst (Pd(PPh₃)₄) into hollow porous organic nanospheres (H-PONs) based on a co-hyper-crosslinking mediated self-assembly strategy by using polylactide-b-polystyrene (PLA-b-PS) and Pd(PPh₃)₄ as precursors. The intrinsic catalytic activity of Pd(PPh₃)₄ could be well retained even if immobilized into H-PONs through a one-step Scholl reaction. Owing to the hierarchically porous structure, high surface area and well-dispersed active sites, the resulting H-PONs-Pd(PPh₃)₄ exhibited excellent catalytic activity, enhanced stability, and good recyclability for the Suzuki-Miyaura coupling in aqueous media. We hope that such a facile synthesis approach can provide a broad platform to support various transition metal catalysts anchored into hollow porous nanomaterials for the heterogeneous catalysis field.