Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (02): 265-272.doi: 10.3866/PKU.WHXB201111251


Synthesis, Characterization and Properties of Salen-Type Complexes

LIU Jia, GUO Li-Qin, ZHANG Xiao-Hong, RUAN Wen-Juan, ZHU Zhi-Ang   

  1. College of Chemistry, Nankai University, Tianjin 300071, P. R. China
  • Received:2011-09-08 Revised:2011-11-21 Published:2012-01-11
  • Contact: RUAN Wen-Juan
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20671053).

Abstract: Two new Salen ligands H2L1 (N,N'-bis(3-dimethoxy-salicylidene)-4,5-dimethoxy-1,2- phenylenediamine) and H2L2 (N,N'-bis(3-dimethoxy-salicylidene)-4,5-dinitryl-1,2-phenylenediamine), and their nickel, copper, and zinc complexes ML1, and ML2 (M=Ni, Cu, Zn) were synthesized. The compounds synthesized were characterized by 1H-nuclear magnetic resonance (1H NMR), ultraviolet-visible absorption spectrometry (UV-Vis), infrared (IR) spectrometry, mass spectroscopy (MS), and elemental analysis. The fluorescence properties of the complexes were also studied. The fluorescence intensity of ligand H2L2 was lower than that of ligand H2L1, because of the introduction of the strong electron-withdrawing group, ―NO2. Moreover, the fluorescence intensities of the zinc complexes are greater than those of the ligands; however the fluorescence is quenched upon complexing of nickel or copper ions. In addition, the cyclic voltammetry shows that the redox process in CuL1 was a one-electron quasi-reversible charge-transfer. Because of the introduction of the electron-donating group ―OCH3, the solution conductivity of ligand H2L1 was lower than that of H2L2.

Key words: Salen-type complex, Synthesis and characterization, Spectrum property, Electrochemical property, Fluorescence property


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