辐射防护2012，Vol.32Issue(1)：21-27,7.
离子液体1-丁基-2,3-二甲基咪唑六氟磷酸盐对γ射线辐射稳定性研究
Radiation Stability of Ionic Liquid 1-butyl 2,3-dimethyl Hexafluorophosphate under Gamma Irradiation
摘要
Abstract
The stability of hydrophobic ionic liquid 1-butyl 2,3-dimethylimidazolium hexafluorophosphate（[BuMeMeIm]PF 6） was studied by 60 Co gamma-ray irradiation in nitrogen atmosphere for the maximum dose of 400 kGy.[BuMeMeIm]PF 6 becomes gradually considerably darkened with increasing gamma-ray irradiation dose.The light absorbance of ionic liquids increases linearly with the irradiation dose.But the change in color and UV-Vis absorbance of [BuMeMeIm]PF 6 was obviously less than that of 1-butyl-3-methylimidazolium hexafluorophosphate（[ BuMeIm]PF 6）.Both the FTIR and 1 H NMR spectra of [BuMeMeIm]PF 6 show no difference before and after irradiation.HPLC analysis proved that the radiolysis ratio of the [BuMeMeIm]PF 6 is less than that of [BuMeIm]PF 6.ESIMS data indicate that the loss of the Bu· group from the imidazolium ring is one of the initial step of [BuMeMeIm] ＋ cation radiolysis.Therefore,the substitution of H at C2 position on the imidazolium ring with methyl group increases the radiochemical stability of the imidazolium cation.关键词
γ射线/离子液体/[BuMeMeIm]PF6/辐射稳定性Key words
gamma-ray/ionic liquid/[BuMeMeIm]PF 6/radiation stability分类
化学化工引用本文复制引用
高思旖,窦辉,丁立生,龚频,罗亮,陈达..离子液体1-丁基-2,3-二甲基咪唑六氟磷酸盐对γ射线辐射稳定性研究[J].辐射防护,2012,32(1):21-27,7.基金项目
国家自然科学基金资助项目 （）
南京航空航天大学中央高校基本科研业务费专项资金资助项目 （）
