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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (6): 1021-1026.DOI: 10.16553/j.cnki.issn1000-985x.2025.0015

• 研究论文 • 上一篇    下一篇

双核VIV配合物的合成、晶体结构及磁性研究

金雨欣(), 于海丽, 王钰晴, 谢龙琛, 田洪瑞, 陈宝宽()   

  1. 辽宁石油化工大学石油化工学院,抚顺 113001
  • 收稿日期:2025-01-17 出版日期:2025-06-20 发布日期:2025-06-23
  • 通信作者: 陈宝宽,博士,教授。E-mail: chenbaokuan@lnpu.edu.cn
  • 作者简介:金雨欣(2000—),女,辽宁省人,硕士研究生。E-mail: 2980221561@qq.com
  • 基金资助:
    国家自然科学基金(22171122);辽宁“兴辽英才计划”青年拔尖人才项目(XLYC2007130)

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

摘要: 本文以五氧化二钒(V2O5)作为钒源,吡唑-3,5-二羧酸(H2L)和N-甲基咪唑(Me-Im)为配体,在溶剂热的条件下合成了一例还原型双核VIV配合物,其化学式为[VIV2O3(L)(Me-Im)4](1)。通过单晶X射线衍射、粉末X射线衍射、傅里叶变换红外光谱、热重分析及X射线光电子能谱等对配合物1进行了充分地表征。单晶X射线衍射结果表明:配合物1结晶于单斜晶系,P21/c空间群,其结构中包含两个晶体学独立的VIV离子,完全去质子化的吡唑-3,5-二羧酸(L2–)作为桥联配体将两个VIV离子连接,而四个Me-Im作为封端配体与这两个VIV离子配位,由此构筑了配合物1的零维双核VIV结构。此外,由于VIV d轨道中含有单电子,因此研究了配合物1的磁性能,结果表明该配合物存在铁磁相互作用。

关键词: VIV离子; 配合物; 晶体结构; 溶剂热法; 铁磁

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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