We report here a direct knitting Method for preparation of highly robust, effective while air- and moisture-tolerant, and readily recyclable three-dimensional (3D) porous polymer-Pd network (PPPd) from the widely used Pd(PPh₃)₄. Electro-beam induced Pd atom crystallization was observed for the first time in organic polymer and revealed the ultrafine dispersion of palladium atoms. Challenging types of Suzuki-Miyaura couplings, reductive coupling of aryl halides and oxidative coupling of arylboronic acid were successively catalyzed by PPPd in aqueous media. Also catalytically selective CH functionalization reactions were achieved with orders of magnitude more efficient than conventional Pd homogeneous catalysts. The strategy developed here provides a practical method for easy-to-make yet highly efficient heterogeneous catalysis.

我们在这里报告一种直接编织的方法，用于从广泛使用的Pd（PPh ₃）₄制备高度坚固，有效，同时耐空气和湿气以及易于回收的三维（3D）多孔聚合物-Pd网络（PPPd）。首次在有机聚合物中观察到电子束诱导的Pd原子结晶，并揭示了钯原子的超细分散。在水性介质中，PPPd依次催化了具有挑战性的Suzuki-Miyaura偶联类型，芳基卤化物的还原偶联和芳基硼酸的氧化偶联。也是催化选择性碳H官能化反应比常规的Pd均相催化剂效率高出几个数量级。本文开发的策略为易于制造但高效的多相催化提供了一种实用的方法。