Journal of Synthetic Crystals, Volume. 54, Issue 6, 1021(2025)
Synthesis, Crystal Structure and Magnetic of Di-Nuclear VIV Complex
Yuxi JIN, Haili YU, Yuqing WANG, Longchen XIE, Hongrui TIAN, and Baokuan CHEN*
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.