高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (3): 20240437.doi: 10.7503/cjcu20240437

• 研究论文: 无机化学 • 上一篇    下一篇

一种钍-铁金属氧簇的合成、 结构、 磁性及在催化苄胺偶联反应中的应用

王春晖, 张洋, 韩哲, 高原, 何普涌, 范超越, 邱杰()   

  1. 西安交通大学能源与动力工程学院,西安 710049
  • 收稿日期:2024-09-20 出版日期:2025-03-10 发布日期:2024-11-05
  • 通讯作者: 邱杰 E-mail:qiujie1228@mail.xjtu.edu.cn
  • 基金资助:
    国家自然科学基金(22076152)

Synthesis, Structure, Magnetism of a Thorium-Iron Oxo Cluster and Its Application in Catalyzing the Coupling Reaction of Benzylamine

WANG Chunhui, ZHANG Yang, HAN Zhe, GAO Yuan, HE Puyong, FAN Chaoyue, QIU Jie()   

  1. School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China
  • Received:2024-09-20 Online:2025-03-10 Published:2024-11-05
  • Contact: QIU Jie E-mail:qiujie1228@mail.xjtu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22076152)

摘要:

采用溶剂热法合成了一种新型带负电的钍-铁金属氧簇[Th2Fe10O4(C6H5PO3)12(CH3O)8Cl4]6-(Th2Fe10), 并表征了其晶体结构、 化学组成、 磁性质和催化性能. 单晶X射线衍射数据显示, Th2Fe10为一种新型十二核Th-Fe金属氧簇, Th(Ⅳ)和Fe(Ⅲ)离子的协同水解、 醇解和缩聚反应以及苯基膦酸根的钝化作用促进了该簇合物的形成. Th2Fe10不仅是第二例被报道的Th-Fe氧簇, 也是为数不多的锕系-过渡金属氧簇之一. 光性质和磁性质表征结果表明, Th2Fe10晶体具有显著的吸收可见光的特性, 且Fe(Ⅲ)离子间展现出强的反铁磁交换作用. 催化反应结果表明, Th2Fe10具有优良的催化苄胺偶联反应的性能, 实现了高达94%的转化率和96%的选择性, 且经过多次循环使用后, 仍保持良好的催化性能. 活性物种清除实验表明, 电子、 空穴、 1O2和·OH在催化过程中具有重要作用, 并通过电化学测试和电子顺磁共振谱(EPR)进行了验证. 基于以上实验结果推测了催化反应机理.

关键词: 异金属氧簇, 钍-铁氧簇, 磁性, 催化性能, 苄胺偶联反应

Abstract:

A novel negatively charged thorium-iron oxo cluster, [Th2Fe10O4(C6H5PO312(CH3O)8Cl46-(Th2Fe10) was synthesized via the solvothermal method. Multiple techniques were employed to investigate its structure, chemical compositions, magnetic properties and catalytic performance. Single-crystal X-ray diffraction data revealed that the structure of Th2Fe10 represents a novel dodecanuclear Th-Fe oxo cluster, which is formed due to the synergistic hydrolysis, alcoholysis and condensation reactions of Th(Ⅳ) and Fe(Ⅲ) ions, along with the passivation by phenylphosphonate groups. Th2Fe10 is not only the second reported Th-Fe oxo cluster, but also one of the few actinide-transition metal oxo clusters. The crystals of Th2Fe10 exhibit remarkable visible light absorption properties and strong antiferromagnetic exchange interactions between Fe(Ⅲ) ions. Moreover, Th2Fe10 possesses excellent performance in catalyzing the benzylamine coupling reaction, achieving up to 94% conversion and 96% selectivity, while maintaining good catalytic performance after multiple cycles. Scavenging experiments of reactive species demonstrated that electrons, holes, 1O2 and ·OH play significant roles in the catalytic process, which was further verified through electrochemical measurements and electron paramagnetic resonance(EPR) spectroscopy. The catalytic reaction mechanism was postulated based on these experimental results.

Key words: Heterometallic oxo cluster, Thorium-iron oxo cluster, Magnetic property, Catalytic performance, Coupling reaction of benzylamine

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