Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (6): 1542-1546.doi: 10.1007/s40242-022-2125-7

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Chelating Metal Ions in a Metal-Organic Framework for Constructing a Biomimetic Catalyst Through Post-modification

PANG Kuan1,4, XUE Huan1, LIU Haixiong1, SUN Jing2, LIU Tianfu1,3,4   

  1. 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China;
    2. School of Electronic Information and Electrical Engineering, Shangluo University, Shangluo 726000, P. R. China;
    3. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China;
    4. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2022-04-10 Online:2022-12-01 Published:2022-12-06
  • Contact: SUN Jing, LIU Tianfu E-mail:202207@slxy.edu.cn;tfliu@fjirsm.ac.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China(No.2018YFA0704502), the National Natural Science Foundation of China(No.22033008), and the Foundation of Director of Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China(Nos.2021ZZ103, 2021ZR105).

Abstract: Crystal engineering, as a burgeoning technology, has been widely used to construct metalloporphyrins biomimetic catalysts. Herein, a bimetallic metal-organic framework (MOF) was constructed by 4-(4-carboxyphenyl)-1,2,4-triazole ligand, Co2+ and Zr4+ metal ions by solvothermal reaction(named PFC-88). A N,N-chelation site was found between the two adjacent ligands in PFC-88, consequently a porphyrin-like structure was obtained through chelating Fe3+ in this site by post-modification, named PFC-88-Fe. The result of a single crystal X-ray technology verified that Fe ions were successfully metalated in the N,N-chelation site of PFC-88, which is assisted by the X-ray absorption near-edge structure(XANES) spectra. An o-phenylenediamine oxidation reaction was applied to assessing the catalytic activity of PFC-88-Fe, in which the absorbance increases of phenazine-2,3-diamine at λ=418 nm were recorded by absorption spectroscopy in kinetic mode, exhibiting the application potential as a biomimetic catalyst.

Key words: Metal-organic framework(MOF), Bimetallic MOF, Crystal structure, Metalation