Abstract:

Zinc (Ⅱ) complex (L₁Zn) derived from Schiff base of bis-(salicylaldehyde)-p-phenylenediamine (L₁) and nickel (Ⅱ) complex (L₂Ni) derived from Schiff base bis-(salicylaldehyde)-m-phenylenediamine (L₂) were prepared, and their structures and properties were characterized by nuclear magnetic resonance, infra-red spectroscopy, ultraviolet spectroscopy, fluorescence spectroscopy and mass spectroscopy.The results showed that the fluorescence spectroscopy of two Schiff base bivalent ion complexes indicated blue shift compared with corresponding salicylaldehyde-derived Schiff base.Moreover, thermal excitation experimental results indicated that L₁Zn and L₂Ni were reversible and irreversible thermochromism respectively, and that they were new species of organic thermochromic materials.