Azole ionic liquid containing phosphine compound and preparation method thereof

The invention discloses azole ionic liquid containing a phosphine compound and a preparation method thereof. The preparation method specifically comprises the steps that trihydrocarbylphosphine and bromoethanol are added to a solvent, the mixture is uniformly mixed and reacts, the obtained solution is filtered, and the filtrate is washed and spin-dried, a product (a) is obtained, (a) is dissolvedin chloroform in an ice-water bath, then a chloroform solution of thionyl bromide is dropped into the chloroform solution of (a), filtering is performed after the ice-water bath stirring is performed,the filtrate is washed and spin-dried to obtain a product (b), (b) is mixed with a hydrocarbyl imidazole or triazole in a solvent, the mixture reacts at 80-125 DEG C, after cooling and drying, (b) issubjected to double decomposition reaction with sodium salt or silver salt such as dicyandiamide anion, nitrocyanamide anion, dinitonium anion, cyanylborohydride anion, dicyanylborohydride anion andazide anion in a solvent, wa