高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (1): 20210576.doi: 10.7503/cjcu20210576

• 研究论文 • 上一篇    下一篇

一种多孔配位聚合物的氢键协同客体响应

莫宗文1,2,张学文1,周浩龙1,周东东1,张杰鹏1   

  1. 1.中山大学化学学院, 生物无机与合成化学教育部重点实验室, 广州 510275
    2.五邑大学生物科技与大健康学院, 江门 529000
  • 收稿日期:2021-08-16 出版日期:2022-01-10 发布日期:2021-09-13
  • 基金资助:
    国家自然科学基金(21731007)

Guest-responses of A Porous Coordination Polymer Based on Synergistic Hydrogen Bonds

MO Zongwen1,2, ZHANG Xuewen1, ZHOU Haolong1, ZHOU Dongdong1, ZHANG Jiepeng1()   

  1. 1.MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,School of Chemistry,Sun Yat?Sen University,Guangzhou 510275,China
    2.School of Biotechnology and Health Sciences,Wuyi University,Jiangmen 529000,China
  • Received:2021-08-16 Online:2022-01-10 Published:2021-09-13
  • Contact: ZHANG Jiepeng E-mail:zhangjp7@mail.sysu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21731007)

摘要:

由硝酸锌、 吡唑-3,5-二羧酸(H3pzdc)和2-氨基对苯二甲酸(H2abdc)在溶剂热条件下反应得到一种多孔配位聚合物(Me2NH2)[Zn2(pzdc)(abdc)]·H2O·DMF(1·g), 其中Me2NH2+由溶剂N,N-二甲基甲酰胺(DMF)水解得到, 1可视为平行排列的平整带状{Zn2(pzdc)}+链被abdc2-柱子交错支撑而成的三维多孔框架. 通过脱附/吸附溶剂分子, 中心对称的配位聚合物1·g可以可逆转变成手性的(Me2NH2)[Zn2(pzdc)(abdc)](1). 单晶结构分析表明, 在客体响应过程中, 基于框架、 抗衡离子和客体分子之间的氢键协作与竞争, 抗衡离子发生了显著的移动 和转动, 导致{Zn2(pzdc)}+链扭曲和转动, 伴随着超过10%的晶胞体积和孔洞率变化. 气体吸附测试表明, 化合物1'对N2和CO2存在不同的结构响应行为.

关键词: 金属有机框架, 柔性, 客体响应, 抗衡离子

Abstract:

Solvothermal reaction of Zn(NO32·6H2O, pyrazole-3, 5-dicarboxylic acid (H3pzdc) and 2-amino-1,4-benzenedicarboxylic acid (H2abdc) in NN-dimethylformamide(DMF) produced a porous coordination polymer(Me2NH2)[Zn2(pzdc)(abdc)]·H2O·DMF(1·g, g means guest molecules, H2O and DMF), in which Me2NH2+ was generated from the hydrolysis of the solvent DMF. The 3-dimensional porous coordination framework of 1 can be regarded as a pillared-ribbon structure consisting of parallelly-aligned flat {Zn2(pzdc)}+ ribbons and abdc2- pillars. via desorption/adsorption of solvent molecules, centrosymmetric 1·g can reversibly transform to a chiral framework (Me2NH2)[Zn2(pzdc)(abdc)](1'). Single-crystal X-ray diffraction analyses showed that, based on the competition and cooperation of hydrogen bonds among the host framework, counter cations, and neutral guest molecules, the counter cations underwent significant movement and rotation in the guest-responsive structural transformations, giving rise to the distortion and rotation of the {Zn2(pzdc)}+ ribbon, as well as more than 10% changes of the unit-cell volume and void ratio. Gas adsorption measurements of 1' showed different responses toward N2 and CO2.

Key words: Metal-organic framework, Flexibility, Guest response, Counter ion

中图分类号: 

TrendMD: