高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (9): 2181.

• 研究论文 • 上一篇    下一篇

Zn(II), Cu(II), Co(II)与3,5-二硝基苯甲酸-咪唑三元超分子配合物的合成、晶体结构及性质

张有明,张勤生,林奇,曹成,卢彦云,魏太保   

  1. 西北师范大学化学化工学院, 生态环境相关高分子材料教育部重点实验室, 甘肃省高分子材料重点实验室, 兰州 730070
  • 收稿日期:2011-04-07 修回日期:2011-05-19 出版日期:2011-09-10 发布日期:2011-08-11
  • 通讯作者: 魏太保 E-mail:weitaibao@126.com
  • 基金资助:

    国家自然科学基金(批准号： 21064006)资助.

Syntheses, Crystal Structures and Properties of Three New Complex Constructed from 3,5-Dinitrobenzoic Acid and Imidazole with Zn(Ⅱ), Cu(Ⅱ) and Co([Ⅱ)

ZHANG You-Ming, ZHANG Qin-Sheng, LIN Qi, CAO Cheng, LU Yan-Yun, WEI Tai-Bao*   

  1. Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment\|Related Polymer Materials, Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
  • Received:2011-04-07 Revised:2011-05-19 Online:2011-09-10 Published:2011-08-11
  • Contact: WEI Tai-Bao E-mail:weitaibao@126.com
  • Supported by:

    国家自然科学基金(批准号： 21064006)资助.

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被引次数

10

摘要： 摘要 在水和甲醇混合溶液中合成了3个配合物[Zn(DNBC)2(Im)2](1), [Cu(DNBC)2(Im)(H2O)](2) [Co1.5(DNBC)4(Im)(CH3OH)(H2O)2](3) (DNBC = 3,5-二硝基苯甲酸, Im = 咪唑), 并进行了常规表征，单晶X-射线衍射测定了3个配合物的晶体结构。结果表明，配合物1采用四配位，且形成扭曲的四面体形式，通过分子间氢键及范德华力形成了三维网状的超分子框架结构。配合物2中金属铜原子采用五配位，分别与四个氧原子和一个咪唑氮原子配位，形成一个扭曲的四方锥体，而且通过羧基和硝基与金属铜连接形成一个一维Z字链的超分子链状结构。配合物3的空间群为p2(1)/n, a = 1.20876(7)nm, b = 2.63287(16)nm, c = 1.36466(9)nm, V = 4.3045(5)nm3, Z = 4, F(000) = 2166, Co…Co原子之间的距离为0.3587nm。在配合物3中，由八面体配位的Co(II)离子与μ-OH2组成的三核金属钴通过氢键与相邻的三核金属钴连接，Co(II)离子与μ-OH2形成一维Z字链，并且配合物的空腔中包含未配位的咪唑和甲醇分子。配合物3的磁学性质测试表明，三核金属Co(II)之间存在着很好的反铁磁交换作用。

关键词: 3,5-二硝基苯甲酸;  , 咪唑;  , 配合物;  , 晶体结构

Abstract: Three complexes with 3,5-dinitrobenzoic acid (DNBC) and imidazole (Im) ligands Zn(DNBC)2(Im)2 (1), Cu(DNBC)2(Im)(H2O) (2), Co1.5(DNBC)4(Im)(CH3OH) (3) were synthesized in water-methanol mixture solution and characterized by elemental analysis, IR spectra. Their crystal structures were determined by single crystal X-ray diffraction. The c complex 1 possesses tridimensional netlike supramolecular structure which is formed by intermolecular hydrogen bonding and Van der Waals force, where each Zn(II) is in 2O+2N coordination modes, each four-coordinated Zn(II) ions form a distorted tetrahedral geometry. The complex 2 has a 1D zigzag chain networks, where each Cu(II) is in 4O+N coordination modes, and each five-coordinated Cu(II) ions form a distorted square-pyramidal geometry. The complex 3 crystallizes in the monoclinic system with space group P2(1)/n, a = 1.20876(7)nm, b = 2.63287(16)nm, c = 1.36466(9)nm, V = 4.3045(5)nm3, Z = 4, F(000) = 2166, the adjacent Co…Co distance of 0.3587nm. Complex 3 possesses 1D zigzag chain composed by Co(II) and by μ-OH2, while triple-clear of octahedral Co(II) bridged by μ-OH2 further connected through the hydrogen bonding to adjacent triple-clear Co(II). Thus, the aggregation of the coordination units through O–H…O hydrogen bonds, results in the formation of channels, which are occupied by imidazole molecules and methanol molecules. Magnetic measurements of complex 3 indicate antiferromagnetic interactions between adjacent Co(II) ions within the trimer.

Key words: 3,5-Dinitrobenzoic acid; , Imidazole; , Complex; , Crystal structure

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