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优秀的pd载磁纳米催化剂在多碳素和酸双联体上

Haijiao Jia¹, Mengqi Cheng¹, Ran Zhao¹

¹Tianjin Key Laboratory for Modern Drug Delivery and High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.

|April 29, 2024

概括

一种在磁性上固定的新型纳米催化剂在苏苏基和赫克反应中表现出高效率和可重复使用性. 这种催化剂提供了出色的产量和稳定性,显示了工业应用的巨大潜力.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
催化剂是一种催化剂.

背景情况:

(Pd) 纳米催化剂对于各种有机转变至关重要.
开发可回收和高效的异质催化剂仍然是一个重大挑战.
在磁性支上固定Pd在催化剂回收和重复使用方面具有优势.

研究的目的:

为了合成和描述一种新的磁性纳米催化剂 (Fe3O4@SiO2-FPBA-DTPA-Pd).
评估新纳米催化剂在木和赫克反应中的催化性能.
评估固定催化剂的稳定性和可重复使用性.

主要方法:

合成Fe3O4@SiO2核心外纳米粒子.
使用乙二胺五酸 (DTPA) 和甲基酸 (FPBA) 作为双体,使的固定.
使用技术进行表征,以确定尺寸,Pd含量,热稳定性和磁性.
在多个苏子基和赫克合反应中对催化活性的评估.

主要成果:

这种Fe3O4@SiO2-FPBA-DTPA-Pd纳米催化剂的尺寸为5-15nm,含量为1.44 mmol/g的Pd2+/Pd0.
催化剂表现出高热稳定性 (低于232.7°C) 和和磁化为21.17emu/g,用于磁性回收.
在17个测试的苏子基和赫克反应中,14个反应的产量超过了90%,超过了单个连接体组的催化剂.
纳米催化剂在木和赫克反应模型中经过七个反应周期后保持了超过95%的产量,这表明其可重复使用性很好.

结论:

开发的Fe3O4@SiO2-FPBA-DTPA-Pd纳米催化剂对木和赫克反应非常有效.
磁支使催化剂易于分离和回收,这对于工业过程至关重要.
这种强大且可重复使用的纳米催化剂显示了有机合成中大规模工业应用的重大前景.

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