Palladium supported on urea-containing porous organic polymers as heterogeneous catalysts for C–C cross coupling reactions and reduction of nitroarenes

• Published in: Journal of Saudi Chemical Society Vol. 25; no. 9; p. 101317
• Main Authors: Dong, Zhenhua, Pan, Hongguo, Chen, Jing, Fan, Lulu, Guo, Jiaxing, Wang, Wentao
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2021; Elsevier
• Subjects: Heck cross coupling; Pd nanoparticles; Porous organic polymers; Reduction of nitroarenes; Suzuki-Miyaura cross coupling; Heck cross coupling; Suzuki-Miyaura cross coupling; Reduction of nitroarenes; Pd nanoparticles; Porous organic polymers
• ISSN: 1319-6103
• DOI: 10.1016/j.jscs.2021.101317

The novel palladium nanoparticles (Pd@POPs) were successfully prepared with controllable sizes and dispersity through the introduction of H2PdCl4 into urea-linked porous organic polymers (POPs) in an aqueous environment followed by reducing Pd(II) to Pd(0) by NaBH4. The newly prepared Pd@POPs were thoroughly characterized by FT-IR, ICP-AES, BET, XRD, SEM and TEM. Furthermore, the catalytic reactivities of this novel Pd@POPs were investigated via Heck, Suzuki-Miyaura cross-coupling reaction and nitroarene reduction, and they exhibited superior catalytic performances in all these three reactions, producing the corresponding products in up to quantitative yields. Additionally, the Pd@POPs had excellent recyclability in both Heck and Suzuki-Miyaura cross-coupling reactions with the repeating time up to four times and ten times, respectively, along with no obvious decrease of catalytic reactivities.