Method for synthesizing organic ionic compounds

Abstract

The invention discloses a method for synthesizing organic ionic compounds. The method is a two-step method comprising the steps of: first, amine or a heterocyclic compound containing N element is subject to a reaction with a matter which can provide protons, such that an amine salt or a heterocyclic onium salt is produced; second, the obtained amine salt or heterocyclic onium salt is subject to a reaction with carbonate, such that a corresponding quaternary ammonium salt or an N- substituted heterocyclic onium salt is produced. The organic ionic compound is a salt comprising one of the following anions: BF4<->, PF6<->, ClO4<->, CF3SO3<->, C4F9SO3<->, [(CF3SO2)2N] <->, [(C2F5SO2)2N] <->, [B(COOCOO)2] <->, [(CN)2N] <->, BF2(CF3)2<->, BF(CF3)3<->, PF3(C2F5)3<->, and PF3(CF3)3<->. After a reaction is carried out between an acid solution and amine or a heterocyclic compound containing N element, water is removed through heating, vaporizing or distilling, such that the ammonium salt or the heterocyclic onium salt with little water content is obtained. The first step of the method assists in controlling the acid concentration of the reaction system, such that the reaction efficiency can be improved. After the first-step reaction, water residual contents in the ammonium salt or the heterocyclic onium salt can be minimized, such that possibilities of side reactions can be reduced.

Description

technical field

[0001] The invention relates to a synthesis method of an organic ionic compound, in particular to a synthesis method of an organic ionic compound with a lower melting point. Background technique

[0002] Organic ionic compounds are a class of substances composed of organic cations and anions. The cations are usually imidazolium ions, pyridinium ions, quaternary ammonium ions, pyrrolidinium ions or piperidinium ions. The representative molecular structures are as follows:

[0003]

[0004] When the anion is BF 4 - 、PF 6 - , ClO 4 - 、CF 3 SO 3 - 、C 4 f 9 SO 3 - , [(CF 3 SO 2 ) 2 N] - , [(C 2 f 5 SO 2 ) 2 N] - 、[B(COOCOO) 2 ] - , [(CN) 2 N] - , BF 2 (CF 3 ) 2 - , BF(CF 3 ) 3 - 、PF 3 (C 2 f 5 ) 3 - 、PF 3 (CF 3 ) 3 - When one of them, such organic ionic compounds usually have a lower melting point, so they are also called room temperature ionic liquids (room temperature molten salts).

[0005] Organic ionic compounds wi...

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