Abstract:

Task-specific Schiff-base ionic liquid with double reactivity centers was prepared by step synthesis. Firstly, Fe-based ionic liquid with the functional group of -NH₂ was synthesized by the reaction of 1-propylamine-3-methylimdazolium chloride and FeCl₃. Secondly, Schiff-base ligand H₂L was prepared by the reaction of 1,3-diamino-2-hydroxypropane and 3,5-di-tert-butylsalicylaldehyde, and its cobalt complex CoL was also prepared. Complex CH₂Cl-CoL with the functional group of -CH₂Cl was synthesized by the reaction of 4-chlorobutyryl chloride and complex CoL. Finally, task-specific Schiff-base ionic liquid was prepared by the reaction between -NH₂ and -CH₂Cl of the above two compounds. The compounds synthesized were characterized by elemental analysis, infrared spectrometry(IR), UV-Visible spectroscopy(UV-Vis), ¹H nuclear magnetic resonance spectra(¹H NMR), Mass spectrometry(MS), inductively coupled plasma mass spectro-metry(ICP-MS) and Raman spectrometry. Task-specific Schiff-base ionic liquid was confirmed to be prepared successfully and to be composed by Schiff-base Co complex cation and Fe complex anion.

Key words: Schiff-base, Fe, Task-specific ionic liquid