Safari Sahar, Ghorbani-Choghamarani Arash, Monem Arezo, Rezaeivala Majid
Department of Organic Chemistry, Faculty of Chemistry and Petroleum Sciences, Bu-Ali Sina University, Hamedan, Iran.
Department of Chemical Engineering, Hamedan University of Technology, Hamedan, Iran.
Sci Rep. 2025 Jul 12;15(1):25272. doi: 10.1038/s41598-025-10438-8.
This study designed and synthesized a new magnetic Palladium-containing nanocatalyst supported on ZnFeO (zinc ferrite magnetic nanoparticles). TGA, TEM, FT-IR, EDS, XRD, BET, VSM, X-ray mapping, ICP-OES, and SEM techniques are used to analyze the structure and magnetic properties of this nanomagnetic material. The synthesized heterogeneous catalyst (ZnFeO@SiO@CPTMS@PYA-Pd) revealed remarkable properties, including high thermal and chemical stability, low toxicity, and efficient reusability. The catalytic behavior of ZnFeO@SiO@CPTMS@PYA-Pd was studied in very well-known C-C bond formation reactions (i.e., Stille and Suzuki cross-coupling reactions), and substituted biphenyls were achieved with good to high yield and conversion. The catalyst demonstrated exceptional performance in cross-coupling reactions, achieving yields of up to 96% for Suzuki reactions (100 min reaction time) and 94% for Stille reactions (120 min reaction time) under optimized conditions. The ZnFeO@SiO@CPTMS@PYA-Pd was recovered easily by an external magnet and reused for five consecutive runs while maintaining with negligible decreases in its activity in described coupling reactions.
本研究设计并合成了一种负载在ZnFeO(锌铁氧体磁性纳米颗粒)上的新型含钯磁性纳米催化剂。采用热重分析(TGA)、透射电子显微镜(TEM)、傅里叶变换红外光谱(FT-IR)、能谱分析(EDS)、X射线衍射(XRD)、比表面积分析(BET)、振动样品磁强计(VSM)、X射线映射、电感耦合等离子体质谱(ICP-OES)和扫描电子显微镜(SEM)技术来分析这种纳米磁性材料的结构和磁性。合成的多相催化剂(ZnFeO@SiO@CPTMS@PYA-Pd)具有显著的性能,包括高热稳定性和化学稳定性、低毒性以及高效的可重复使用性。在非常著名的C-C键形成反应(即Stille和Suzuki交叉偶联反应)中研究了ZnFeO@SiO@CPTMS@PYA-Pd的催化行为,以良好至高的产率和转化率得到了取代联苯。该催化剂在交叉偶联反应中表现出优异的性能,在优化条件下,Suzuki反应(反应时间100分钟)的产率高达96%,Stille反应(反应时间120分钟)的产率高达94%。ZnFeO@SiO@CPTMS@PYA-Pd可通过外部磁铁轻松回收,并连续重复使用五次,同时在所述偶联反应中其活性的降低可忽略不计。
Sci Total Environ. 2023-5-10