Citation: Yuan GAO, Yiming LIU, Chunhui WANG, Zhe HAN, Chaoyue FAN, Jie QIU. A hexanuclear cerium oxo cluster stabilized by furoate: Synthesis, structure, and remarkable ability to scavenge hydroxyl radicals[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(3): 491-498. doi: 10.11862/CJIC.20240271 shu

A hexanuclear cerium oxo cluster stabilized by furoate: Synthesis, structure, and remarkable ability to scavenge hydroxyl radicals

School of Nuclear Science and Technology, Xi′an Jiaotong University, Xi′an 710049, China

Corresponding author: Jie QIU, qiujie1228@xjtu.edu.cn
Received Date: 17 July 2024
Revised Date: 19 December 2024

Figures(7)

To explore the effects of ligands on the structure, properties, and applications of cerium oxo clusters, we synthesized the first cerium oxo cluster using furoate (FA) as ligands. The crystal NH₄[Ce₆O₄(OH)₄(FA)₁₂(NO₃)(H₂O)]·5CH₃CN·12H₂O (1) of this cluster were thoroughly characterized using techniques such as single-crystal X-ray diffraction, powder X-ray diffraction, X-ray photoelectron spectroscopy, elemental analysis, thermogravimetry, and spectroscopy. Single-crystal X-ray diffraction analysis revealed that compound 1 exhibits a hexanuclear cluster structure with a [Ce₆O₄(OH)₄]¹²⁺ core. As confirmed by the Raman spectrum, the Ce—O—Ce bond in this core suggests its formation via the hydrolysis reaction of Ce(Ⅳ) ions. This core is further stabilized by one water, one nitrate, and twelve FA groups to form the entire cluster structure. These results reveal that the hydrolysis and condensation reactions of Ce(Ⅳ) ions and their complex reaction with FA result in the formation of the cluster. The Fenton reaction was used to generate hydroxyl radicals, and methyl violet was utilized as an indicator to explore the free radical scavenging ability of compound 1. The UV-visible spectra indicated that the solution of compound 1 effectively scavenges hydroxyl radicals. As the volume of the compound 1 solution gradually increased from 50 to 2 000 μL, the scavenging efficiency rose from 8.32% to 91.06%.
- metal oxo cluster,
- cerium oxo cluster,
- hydrolysis reaction,
- free radical scavenging
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