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化工学报  2013 

酯基功能性离子液体性质及其在空气采样中的应用

DOI: 10.3969/j.issn.0438-1157.2013.z1.025, PP. 165-169

Keywords: 离子液体,电导率,热稳定性,富集

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Abstract:

合成了两种新型酯基功能性离子液体1-乙酸甲酯基-3-甲基咪唑双三氟甲基磺酰亚胺([CH2COOCH3MIM]NTf2)和1-对甲基苯甲酸甲酯基-3-甲基咪唑双三氟甲基磺酰亚胺([CH2C6H4COOCH3MIM]NTf2),研究了化合物的热稳定性,在各种溶剂中的溶解性以及在有机溶剂乙腈、DMSO、甲醇和乙酸乙酯中的电导率,同时比较了其与常用的富集材料Tenax的富集效果。结果表明:该类离子液体在300℃以下基本没有失重,热稳定性较好;能与大多数有机溶剂互溶,溶解性随着溶剂极性的增加而增大;离子液体的电导率随着浓度和温度的升高而升高,且在不同有机溶剂中电导率相差较大,其顺序为κ(乙腈作溶剂)>κ(甲醇作溶剂)>κ(DMSO作溶剂)>κ(乙酸乙酯作溶剂);离子液体[CH2COOCH3MIM]NTf2对酯类物质的富集效果优于Tenax。

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