双吡啶双酰胺配体构筑的钴配合物的合成、结构及光催化性能研究

人工晶体学报 ›› 2024, Vol. 53 ›› Issue (10): 1791-1797.

双吡啶双酰胺配体构筑的钴配合物的合成、结构及光催化性能研究

徐智祥, 安志烜, 李玉瑶, 孙畅, 李晓慧

渤海大学化学与材料工程学院,锦州 121013

收稿日期:2024-06-24 出版日期:2024-10-15 发布日期:2024-10-21
通信作者: 孙畅,博士,讲师。E-mail:15754330995@163.com;李晓慧,博士,副教授。E-mail:lixh198@126.com
作者简介:徐智祥(2003—),男,辽宁省人。E-mail:230452768@qq.com
基金资助:
国家自然科学基金青年科学基金(22201021,22301019);辽宁省科技厅博士启动项目(2022-BS-302);辽宁省大学生创新创业训练计划(S202310167078)

Synthesis, Structure and Photocatalytic Properties of a Cobalt Complex Constructed by Dipyridyl-Diamide Ligand

XU Zhixiang, AN Zhixuan, LI Yuyao, SUN Chang, LI Xiaohui

College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China

Received:2024-06-24 Online:2024-10-15 Published:2024-10-21

摘要/Abstract

摘要： 本文以半刚性的双吡啶双酰胺配体(E)-4,4′-(乙烯-1,2-二基)双-(3-吡啶基)苯甲酰胺(EDPB)作为有机连接体,在溶剂热条件下使其与CoCl₂进行自组装,合成了一例新的钴配合物[Co(EDPB)Cl₂]。通过单晶X射线衍射、粉末X射线衍射、红外光谱、热重分析、固体紫外可见漫反射光谱等技术对该配合物进行了结构和性能测试。结果表明,在该配合物中,中心Co(II)原子呈现四配位模式,并通过EDPB配体连接成一维链状结构。该配合物展现出优异的可见光吸收性能,对Cr(VI)还原反应展现出优异的非均相催化活性,反应60 min时Cr(VI)的还原率达到97.9%。探究了[Co(EDPB)Cl₂]配合物对光催化Cr(VI)还原反应的循环使用性,其至少可循环使用5次而不发生活性降低,证明其优异的循环稳定性。

关键词: 钴配合物, 双吡啶双酰胺配体, 溶剂热合成, 光催化, Cr(VI)还原

Abstract: In this paper, a semi-rigid dipyridyl-diamide ligand was selected as the organic linker to assemble with CoCl₂, and a new cobalt complex [Co(EDPB)Cl₂] (EDPB=(E)-4,4′-(ethene-1,2-diyl)bis(N-(pyridin-3-yl)benzamide)) was prepared under the solvothermal conditions. The structure and properties of the complex were tested by single crystal X-ray diffraction, powder X-ray diffraction, infrared spectra, thermogravimetric analysis, and solid-state UV-Vis diffuse reflectance spectra. It is found that the Co(II) atoms in the complex are tetracoordinated, which connect with EDPB ligands to form a 1D chain structure. The complex exhibits excellent absorption for visible light and highly heterogeneous catalytic activity for Cr(VI) reduction reaction with 97.9% of reduction rate in 60 min. The complex’s ability to be recycled for photocatalytic Cr(VI) reduction reaction was examined. Remarkably, it can be reused at least five times without any degradation in activity, showing its excellent cycling stability.

Key words: cobalt complex, dipyridyl-diamide ligand, solvothermal synthesis, photocatalysis, Cr(VI) reduction

中图分类号:

O614.81⁺2

徐智祥, 安志烜, 李玉瑶, 孙畅, 李晓慧. 双吡啶双酰胺配体构筑的钴配合物的合成、结构及光催化性能研究[J]. 人工晶体学报, 2024, 53(10): 1791-1797.

XU Zhixiang, AN Zhixuan, LI Yuyao, SUN Chang, LI Xiaohui. Synthesis, Structure and Photocatalytic Properties of a Cobalt Complex Constructed by Dipyridyl-Diamide Ligand[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(10): 1791-1797.

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