高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (10): 20220218.doi: 10.7503/cjcu20220218

• 研究论文: 无机化学 • 上一篇    下一篇

两个镉(II)金属有机骨架的可控合成与结构相关性

邢珮琪1, 陆通1, 李光华2, 王力彦1()   

  1. 1.吉林大学化学学院, 超分子结构与材料国家重点实验室
    2.吉林大学化学学院, 无机合成与制备化学国家重点实验室, 长春 130012
  • 收稿日期:2022-04-06 出版日期:2022-10-10 发布日期:2022-05-08
  • 通讯作者: 王力彦 E-mail:wangliyan@vip.sina.com
  • 基金资助:
    国家自然科学基金(21827805)

Controllable Syntheses of Two Cd(II) Metal-organic Frameworks Possessing Related Structures

XING Peiqi1, LU Tong1, LI Guanghua2, WANG Liyan1()   

  1. 1.State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry
    2.State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China
  • Received:2022-04-06 Online:2022-10-10 Published:2022-05-08
  • Contact: WANG Liyan E-mail:wangliyan@vip.sina.com
  • Supported by:
    the National Natural Science Foundation of China(21827805)

摘要:

合成了2,5-二甲氧基-N,N'-双(4-吡啶基)对苯二甲酰胺(简称为dmbpt), 并以其和1,3,5-苯三甲酸(简称为H3btc)为配体合成了2个新配合物[Cd2(dmbpt)2(Hbtc)2]·2DMF·C2H7N·H2O(1)和[Cd3(dmbpt)2(btc)2]·4H2O(2). 配合物1是具有3,5L2拓扑的二维金属有机骨架; 配合物2是具有jcr7拓扑的三维金属有机骨架, 这是一个稀有的拓扑结构. 配合物12都含有二级结构单元Cd2(—COO)4(—Py)4. 在结构关系上, 配合物2的三维网络可以看作是由配合物1的二维网络通过形成新的配位键连接而成的. 在原料和溶剂相同的溶剂热反应条件下, 能以不同比例同时获得2种配合物. 产物中配合物1和配合物2的比例可以通过改变反应物的浓度来调控, 这可能与由DMF分解产生的二甲胺促进H3btc的去质子化有关.

关键词: 金属有机骨架, 二级结构单元, 浓度依赖性合成

Abstract:

2,5-Dimethoxy-N,N'-bis(4-pyridyl)terephthalamide(abbreviated as dmbpt) was synthesized, and two new complexes, [Cd2(dmbpt)2(Hbtc)2]·2DMF·C2H7N·H2O(1) and [Cd3(dmbpt)2(btc)2]·4H2O(2), were further prepared, in which dmbpt and 1,3,5-benzenetricarboxylic acid(abbreviated as H3btc) were used as ligands. Complex 1 is a 2D metal-organic framework(MOF) with 3,5L2 topology. Complex 2 is a 3D MOF with jcr7 topology, which is a rare topology. Both two complexes contain the secondary building unit, Cd2(—COO)4(—Py)4. Regarding structural relations, the 3D framework of complex 2 may be regarded as coordinate-bonded 2D frameworks, which can be found in complex 1. Under the solvothermal condition with the same reactants and solvents, two complexes can be simultaneously produced with different ratios. The ratio of complex 1 to complex 2 in the product can be controlled by changing the concentration of the reactants. This may be attributed to the effect of dimethylamine, which was generated by the decomposition of DMF, on the deprotonation of H3btc.

Key words: Metal-organic framework, Secondary building unit, Concentration-dependent synthesis

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