在MOF上安装N,N'-bidentate合物定拉催化剂,以实现高效的Heck反应
Xiao-Li Xu1, Nian-Nian Wang1, Yong-Hao Zou1
1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210023, Nanjing, PR China.
研究人员开发了一种新的单位催化剂,使用金属有机框架 (MOF) 和氨基氨基氨基酸 (APBA) 连接物. 这种Pd@MOF-APBA系统显示了赫克反应的高效率和稳定性,使催化剂可重复使用.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术纳米技术
背景情况:
- 金属有机框架 (MOF) 是先进的催化剂载体,具有可调节的多孔性和多样化的结构.
- MOFs提供高度暴露的活性位点,使它们成为增强催化剂寿命的有希望的来源.
- 解决催化剂失活问题,如浸出和聚合,对于高效的催化过程至关重要.
研究的目的:
- 合成一种新的单位催化系统,以提高催化剂的寿命和效率.
- 在MOF结构中利用多功能氨基-皮里丁酸 (APBA) 连接体.
- 为了研究在催化反应中分散在MOF-APBA (Pd@MOF-APBA) 上的原子的性能.
主要方法:
- 一种多功能氨基-皮里丁-酸 (APBA) 连接物的合成.
- 修改MOF-808通过用APBA替换调节器连接体.
- 在MOF-APBA结构上分散的催化中心原子,形成Pd@MOF-APBA.
- 在赫克反应中评估Pd@MOF-APBA催化剂.
主要成果:
- Pd@MOF-APBA单点催化系统显示出高效率和稳定性.
- 在赫克反应中实现了高平均周转率 (95000) 和低金属残留量 (4.8 ppm).
- 催化剂在多次运行中表现出极好的可循环利用性,而在格拉姆级反应中没有显著的反应性损失.
结论:
- 开发的Pd@MOF-APBA催化剂有效地推迟了的失活,包括浸出和聚合.
- 适合的N,N'-二酸连体的电特性和结构是催化剂高活性和效率的关键.
- 这种单站式催化系统为开发强大且可重复使用的催化剂提供了有前途的方法.
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