鉴定 [C4mim][NTf2] 的辐射分解产物及其对 Sr2+ 萃取的影响。

Identification of radiolytic products of [C4mim][NTf2] and their effects on the Sr2+ extraction.

机构信息

Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

出版信息

Dalton Trans. 2013 Mar 28;42(12):4299-305. doi: 10.1039/c2dt32418k.

DOI:10.1039/c2dt32418k

PMID:23344964

Abstract

The trace water-soluble radiolytic products of neat 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C(4)mim][NTf(2)]) were identified by analysing water-washed samples of γ-ray irradiated ionic liquids. CF(3)SO(2)OH, CF(3)SOOH, CF(3)SO(2)NH(2), HF and H(2)SO(3) were confirmed as main radiolytic products of [C(4)mim][NTf(2)], and the total radiation chemical yields of the water-soluble radiolytic products (0.35 μmol J(-1)) and that of hydrogen ions (0.46 ± 0.02 μmol J(-1)) were determined by using ion chromatography and neutralization titration, respectively. It was found that the water-soluble radiolytic products of [C(4)mim][NTf(2)] greatly reduced the extraction efficiency of Sr(2+) from water to irradiated [C(4)mim][NTf(2)], while the water-insoluble radiolytic products of [C(4)mim][NTf(2)] had a slight influence on the Sr(2+) extraction.

摘要

通过分析γ射线辐照离子液体的水洗样品，鉴定了纯净 1-丁基-3-甲基咪唑双（三氟甲烷磺酰基）亚胺（[C(4)mim][NTf(2)])的痕量水溶性放射分解产物。CF(3)SO(2)OH、CF(3)SOOH、CF(3)SO(2)NH(2)、HF 和 H(2)SO(3)被确认为[C(4)mim][NTf(2)]的主要放射分解产物，通过离子色谱和中和滴定分别确定了水溶性放射分解产物的总辐射化学产率（0.35 μmol J(-1))和氢离子的总辐射化学产率（0.46 ± 0.02 μmol J(-1))。结果发现，[C(4)mim][NTf(2)]的水溶性放射分解产物大大降低了 Sr(2+)从水中到辐照[C(4)mim][NTf(2)]的萃取效率，而[C(4)mim][NTf(2)]的不溶性放射分解产物对 Sr(2+)的萃取影响较小。