中文摘要：

主要考察了辛基（苯基）-N,N-二异丁基胺甲酰基甲基氧化膦（CMPO）在1-乙基-3-甲基咪唑双三氟甲基磺酰胺酸盐（[C2mim][NTf2]）中的γ 辐解行为，同时考察辐射对CMPO/[C2mim][NTf2]萃取能力的影响。通过超高效液相色谱-四极杆飞行时间质谱联用仪（UPLC/Q-TOF-MS）进行定量分析、辐解产物认定以及产物半定量分析。CMPO/正十二烷作为对比条件进行了相同研究。结果表明：CMPO在[C2mim][NTf2]中的辐解率低于其在正十二烷中，并且辐解路径不同。在正十二烷体系中，CMPO主要发生C―P、C―N键的断链，而在离子液体体系中CMPO主要发生异丁基脱除反应，并与[C2mim]^＋·、·CF3等离子液体产生的自由基发生取代反应。综合辐解研究结果，我们提出CMPO/[C2mim][NTf2]的辐解路径，这加深了CMPO在离子液体中辐解机理的认识。最后，通过萃取实验发现，当硝酸浓度为0.01 mol·L^-1，辐照剂量为800 kGy 时，CMPO/[C2mim][NTf2]对Eu3＋的萃取率依旧达到99%以上。

英文摘要：

The y-radiolysis of octylphenyl-（N,N-（diisobutyl）carbamoyl-methyl） phosphine oxide （CMPO） in 1- ethyl-3-methylimidazoliumbis （trifluoromethylsulfonyl） imide （[C2mim][NTf2]） was studied. The effect of radiation on CMPO/[C2mim][NTf2] extractability was also investigated. Quantitative analysis of CMPO in irradiated CMPO/ [C2mim][NTf2] systems, identification and semi-quantitative analysis of the radiolytic products were performed using ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry （UPLC/Q-TOF-MS）. For comparison, CMPO/dodecane was also studied under the same conditions. The radiolysis ratio of CMPO in [C2mim][NTf2] was found to be lower than in dodecane, because of the different radiolysis pathways. The radiolysis pathway of CMPO in molecular solvent was mainly chain scission of C-P and C-N, while that in [C2mim][NTf2] was the elimination of isobutyl, as well as substitution reactions with [C2mim]^＋· and · CF3 generated from solvent [C2mim][NTf2]. Based on the radiolysis study, we propose a radiolysis pathway for CMPO/[C2mim] [NTf2], providing a deeper understanding of the radiolytic mechanism of CMPO in ionic liquids. Finally, the Eu^3＋ partitioning of CMPO/[C2mim][NTf2] from 0.01 mol· L^-1 HNO3 was higher than 99% at 800 kGy.