Synthesis And Applications In Thermochromism And Electrochemical Of Ionic Liquids

Ionic liquids are usually refers to salts with melting points below100℃and composed entirely ofions. As a new type of green solvents, ionic liquids (ILs) have been applied successfully in many fields.In the thesis, a series of N-methyl imidazole based ILs have been synthesized and characterized by¹H-NMR and IR spectroscopy. The thesis have investigated some ILs based thermochromic systems, andthe electrochemical properties of several conductive polymer carbonized materials in ILs also have beenstudied. The main contents and results are as follows:1.[Emim]Br,[Bmim]Br,[Hmim]TsO and [Bmim]BF₄ILs have been synthesized by the methods ofthe literature news.¹H-NMR and IR spectroscopic information certifies that these ILs have the samestructures as that predicted by theory, and they all can satisfy the need of the experiment.2. Taking setanol as solvent, CVL as chromophoric reagent and IL as chromogenic agent, a series ofthermochromic complexes have been prepared. The thermochromic phenomena of all compounds afterheated have been observed directly by eyes, and the thermochromic complexes have been systematicallyresearched by visible and IR spectroscopy. The results indicated that the five thermochromatic compoundsconform to thermochromism concept, belong to irreversible thermochromism systems.3. Taking ionic liquid [Bmim]BF₄as electrolyte, platinum gauze electrode as counter electrode, silverions electrode as reference electrode, the electrochemical properties of the conductive polymer electrodematerials have been studied by cyclic voltammetry, constant current charge/discharge and EIS tests withclassic three electrodes system.The results indicated that the reversibility and cyclical stability of theseelectrodes made by conductive polymer carbonized materials are all very good, but the specific capacitanceof them are all small.