Spatially isolated palladium in porous organic polymers by direct knitting for versatile organic transformations

• Published in: Journal of catalysis Vol. 355; pp. 101 - 109
• Main Authors: Wang, Xinbo, Min, Shixiong, Das, Swapan K., Fan, Wei, Huang, Kuo-Wei, Lai, Zhiping
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.11.2017
• Subjects: C[sbnd]H bond activation; Direct knitting; Heterogeneous catalysis; Porous organic polymers; Suzuki-Miyaura cross coupling; Suzuki-Miyaura cross coupling; Heterogeneous catalysis; CH bond activation; Porous organic polymers; Direct knitting
• ISSN: 0021-9517; 1090-2694
• DOI: 10.1016/j.jcat.2017.08.030

[Display omitted] •A one-step knitting method to prepare microporous PPPd is developped.•PPPd has a flower-like morphology with high surface area.•PPPd is stable in air and aqueous soluton.•Single-atomic dispersion of Pd is achieved in PPPd.•PPPd showed excellent catalytic activity in versatile organic transformations. 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.