CAJ | 학술논문

烷基链的长短和对称性影响着四烷基季铵离子液体的理化性质,影响着其应用前景.本实验室设计、合成了系列新型丁基三乙基季铵型功能化离子液体,该类离子液体与之前报道的相应离子液体相比,具有相对较低的熔点,同时也具有更低的粘度.合成的离子液体中阴离子分别是三氟甲基磺酰根((CF_3SO_2)_2N~-)、六氟磷酸根(PF_6)、四氟硼酸根(BF_1~-)、硫酸氧根(HSO_4~-)、硫氰酸根(SCN~-)和对甲苯磺酸根(PTSA);利用核磁共振仪、密度仪、热分析仪、黏度仪、元素分析仪对其进行表征;研究了其与常规溶剂的相溶性,并对其结构和性质之间的关系进行探讨.
완기련적장단화대칭성영향착사완기계안리자액체적이화성질,영향착기응용전경.본실험실설계、합성료계렬신형정기삼을기계안형공능화리자액체,해류리자액체여지전보도적상응리자액체상비,구유상대교저적용점,동시야구유경저적점도.합성적리자액체중음리자분별시삼불갑기광선근((CF_3SO_2)_2N~-)、륙불린산근(PF_6)、사불붕산근(BF_1~-)、류산양근(HSO_4~-)、류청산근(SCN~-)화대갑분광산근(PTSA);이용핵자공진의、밀도의、열분석의、점도의、원소분석의대기진행표정;연구료기여상규용제적상용성,병대기결구화성질지간적관계진행탐토.
The length of the alkyl groups and the symmetry of the cations in tetraalkylammonium-based ionic liquids affect the physical properties and their applications. A novel class of ionic liquids based on triethylbutylammonium cation was prepared in our group. In this series, (CF_3SO_2)_2N~- [bis (trifluoromethanesufonyl)imide], PF_6~- , BF_4~-, HSO_4~-, SCN~- and PTSA~- (p-toluenesulfonic acid) were assigned to be the counter ions for the ionic liquids. The synthesis of ionic liquids started with the reaction of triethylamine and n-butyl bromide, followed by the ionic exchange using LiNTf_2, KPF_6, NH_4 BF_4, (Ag_2O and H_2SO_4), KSCN and (Ag_2O and PTSA) as the reactants. Then the residue was extracted with diethyl ether for several times to get the pure product. ~1 H NMR, thermal analysis, cone-plate viscometry, densitometer method, element analysis are applied to determine the structures and properties of these ionic liquids. It is found that these ILs have lower melting points and viscosities compared to the corresponding ionic liquids with symmetrical tetraalkyammonium cations, indicating the significant importance of the asymmetrical cation on the physical properties of the ILs. The miscibility of these ILs with some common solvents was studied, and the relationship between configuration and property of the ILs were also discussed.