Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (10): 20220218.doi: 10.7503/cjcu20220218

• Article: Inorganic Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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