Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (7): 804-812.DOI: 10.11944/j.issn.1000-0518.2016.07.150382

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Cu(Ⅱ)-Coordinated Supramolecular Metallogels Based on Schiff Base Ligands: Preparation and Characterization

XUE Min(),FENG Yanan,LIU Zhen,SUN Ping   

  1. The Key Laboratory for Surface Engineering and Remanufacturing in Shaanxi Province,School of Chemical Engineering,Xi'an Univeristy,Xi'an 710065,China
  • Received:2015-10-28 Accepted:2016-01-15 Online:2016-06-30 Published:2016-06-30
  • Contact: XUE Min
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21403166, No.21303135), Science and Technology Program of Xi'an(No.CXY1443WL14), Key Disciplines of Analytical Chemistry in Shaanxi Province for Financial Support


Three Schiff base ligands containing two pyridine rings, isophthalaldehyde-bis(4-pyridine formyl hydrazone)(S1), isophthalaldehyde-bis(3-pyridine formyl hydrazone)(S2) and isophthalaldehyde-bis(2-pyridine formyl hydrazone) (S3), have been synthesized with isophthalaldehyde and one of isonicotinyl hydrazine, nicotinic hydrazine and 2-pyridine-carboxylic acid hydrazine as raw materials. The gelation behaviors of the three Schiff base ligands with Cu(Ac)2 in different solvents were tested, and three Cu(Ⅱ)-metallogels were obtained. The gelation test results show that a slight variation in ligand structures can lead to dramatic changes in gelation abilities of ligands. The microstructures of metallogels observed by SEM reveal that the morphology of a metallogel depends on the structure of the ligand. FT-IR and UV/Vis spectroscopy studies reveal that the coordination interaction between Schiff base ligands and Cu(Ⅱ) plays an important role for the formation and maintenance of metallogels. The XRD analysis demonstrates that two metallogels formed by ligand S1 and Cu(Ac)2 in two mixed solvents take the same tetragonal packing mode.

Key words: metallogel, Schiff base ligands, coordination interaction, self-assembly