Citation: Yu-Pei FU, Hua YANG, Dan QIAO, Lu-Lu DONG, Xiao-Li CHEN, Hua-Li CUI, Lin LIU, Ji-Jiang WANG. Synthesis, crystal structure, and photocatalytic activity of Co(Ⅱ) and Ni(Ⅱ) complexes based on pyromellitic acid and bis(imidazole)methyl benzene[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(12): 2393-2406. doi: 10.11862/CJIC.2023.200 shu

Synthesis, crystal structure, and photocatalytic activity of Co(Ⅱ) and Ni(Ⅱ) complexes based on pyromellitic acid and bis(imidazole)methyl benzene

School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Reaction Engineering, Laboratory of New Energy & New Function Materials, Yanan University, Yan′an, Shaanxi 716000, China

Corresponding author: Hua YANG, yanghua_08@163.com
Received Date: 14 June 2023
Revised Date: 1 November 2023

Figures(13)

Two new coordination polymers [Co(L)_0.5(1, 3-bib)] (1) and [Ni₂(L)(1, 4-bib)₃(H₂O)₂]·2H₂O (2), where H₄L=1, 2, 4, 5-benzenetetracarboxylic acid, 1, 3-bib=1, 3-bis((1H-imidazol-1-yl)methyl) benzene, and 1, 4-bib=1, 4-bis((1H- imidazol-1-yl)methyl) benzene, were synthesized under hydrothermal conditions. The structures of 1 and 2 were confirmed by elemental analysis, FTIR spectroscopy, single-crystal X-ray diffraction, etc. The results show that 1 and 2 are 3D network structures. The completely deprotonated L^4- ligand adopts the μ₄-к²∶к¹∶к²∶к¹ mode in 1 and the μ₂-к¹∶к⁰∶к¹∶к⁰ coordination mode in 2. Further studies showed that in the presence of H₂O₂ and visible light irradiation conditions, 1 had good photocatalytic performance for the degradation of MO (methyl orange)/MB (methylene blue) in water, and the degradation rates reached 83.2% and 84.5% at 180 min. Under the same conditions, 2 also showed good degradation of the dyes MB and RhB (rhodamine B) in aqueous solution, with 87.0% and 77.4% degradation rates at 180 min, respectively. In addition, the mechanism of photocatalytic degradation of the dye by 1 and 2 was investigated.
- coordination polymer,
- crystal structure,
- photocatalytic degradation
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