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Journal of Synthetic Crystals ›› 2025, Vol. 54 ›› Issue (6): 1021-1026.DOI: 10.16553/j.cnki.issn1000-985x.2025.0015

• Research Articles • Previous Articles     Next Articles

Synthesis, Crystal Structure and Magnetic of Di-Nuclear VIV Complex

JIN Yuxi(), YU Haili, WANG Yuqing, XIE Longchen, TIAN Hongrui, CHEN Baokuan()   

  1. School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China
  • Received:2025-01-17 Online:2025-06-20 Published:2025-06-23

Abstract: A reduced di-nuclear VIV complex with the chemical formula [VIV2O3(L)(Me-Im)4] (1) was synthesized under solvothermal conditions, employing vanadium pentoxide (V2O5) as vanadium source, pyrazole-3,5-dicarboxylic acid (H2L) and N-methylimidazole (Me-Im) as ligands. Complex 1 was fully characterized by single-crystal X-ray diffraction, powder X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy. The single-crystal X-ray diffraction results indicate that complex 1 crystallizes in the monoclinic system, with the space group P21/c. The structure contains two crystallographically independent VIV ions, which are connected by the completely deprotonated pyrazole-3,5-dicarboxylic acid (L2–) as a bridging ligand. Additionally, four Me-Im act as capping ligands, coordinating with these two VIV ions, collectively constructing the zero-dimensional di-nuclear VIV structure of complex 1. Furthermore, the magnetic properties of complex 1 were investigated due to the presence of single electrons in the VIV d-orbital, and the results reveal the presence of ferromagnetic interactions in the compound.

Key words: VIV ion; complex; crystal structure; solvothermal method; ferromagnetism

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