有机化学 ›› 2015, Vol. 35 ›› Issue (5): 1090-1096.DOI: 10.6023/cjoc201411030 上一篇    下一篇

研究论文

双核开链茂铁咪唑受体的合成与阴离子识别研究

卓继斌a, 晏希泉a, 王小雪a, 谢莉莉a,b, 袁耀锋a,b   

  1. a 福州大学化学学院 福州 350116;
    b 能源与环境光催化国家重点实验室 福州 350002
  • 收稿日期:2014-11-16 修回日期:2014-12-09 发布日期:2015-01-05
  • 通讯作者: 袁耀锋 E-mail:yaofeng_yuan@fzu.edu.cn
  • 基金资助:

    国家自然科学基金(Nos.21202019,21372043)、国家基础科学人才培养基金(No.J1103303)资助项目.

Synthesis and Anion Recognition of Acyclic Ferrocene-Based Imidazole Receptors

Zhuo Jibina, Yan Xiquana, Wang Xiaoxuea, Xie Lilia,b, Yuan Yaofenga,b   

  1. a College of Chemistry, Fuzhou University, Fuzhou 350116;
    b State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002
  • Received:2014-11-16 Revised:2014-12-09 Published:2015-01-05
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos.21202019, 21372043), and the National Science Foundation for Fostering Talents in Basic Research of China (No.J1103303).

通过二茂铁甲基咪唑1与不同的二溴代烷反应合成了一系列双核开链的茂铁咪唑受体3a~3e, 化合物3e的晶体结构表明分子间有着强的C—H…F氢键作用. 利用电化学和核磁共振氢谱考察了受体3a~3e对不同常见阴离子的识别能力. 电化学滴定实验表明受体3a~3e在乙腈溶液中均能很好地识别F-. 核磁滴定证实了受体与不同阴离子之间氢键作用及参与类型. Job曲线表明受体分子与阴离子间形成1:1型的配合物, 通过络合常数(Ka)的对比表明受体b<3c对氟离子的选择性识别能力最好.

关键词: 二茂铁, 开链, 咪唑鎓, 合成, 阴离子识别

The design and synthesis of artificial receptors capable of binding and sensing anions have been widely explored in the field of host-guest chemistry. Herein, a series of acyclic ferrocene-based imidazolium receptors 3a~3e were designed and synthesized. All the receptors were prepared by reactions of 1-(ferrocenylmethylene)imidazole 1 with corresponding dibromides in solvent under refluxing, followed by anion exchanges with NH4PF6. The structures of all the products were determined by IR, 1H NMR, 13C NMR, MS and elemental analysis. The crystal structure 3e was confirmed by X-ray crystallography, and it was clear that molecules were linked by C—H…F hydrogen bonds interactions. The interaction between these receptors and various anions was studied by electrochemical measurements and 1H NMR spectroscopy. The receptors 3a~3e were proven to be highly selective and sensitive to F-. 1H NMR titrations demonstrated that the receptors and anions form 1:1 complex, and the receptors displayed a strong (C—H)+…X- in anion recognition. Receptor 3c was the most effective receptor to bind with fluoride ion compared to the others.

Key words: ferrocene, acyclic, imidazolium, synthesis, anion recognition