کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1886665 | 1043544 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Radiation-induced darkening of ionic liquid [C4mim][NTf2] and its decoloration
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
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چکیده انگلیسی
The radiation effect on a hydrophobic room-temperature ionic liquid (RTIL), 1-butyl-3-methyl-imidazolium bis[(trifluoromethyl)sulfonyl]imide ([C4mim][NTf2]), was studied by γ-irradiation under nitrogen atmosphere. Accompanied by color darkening and increase of light absorbance in a wide wavelength range, a distinct absorption peak at around 290 nm for irradiated [C4mim][NTf2] appeared when acetonitrile was used as solvent, and the intensity of the peak enhanced with increasing dose. The spectrophotometric study on the irradiated RTILs containing 1,3-dialkylimidazolium cations associated with different inorganic anions revealed that the peak is ascribed to the radiolysis products of the [C4mim]+. And the wavelength of the peak was affected by alkyl chain length on imidazolium cation, while the intensity of the peak was influenced by anions. With incorporating a little amounts of oxidants, such as KMnO4 and HNO3 into irradiated [C4mim][NTf2], the intensity of the peak at 290 nm decreased obviously and the decoloration of [C4mim][NTf2] occurred, suggesting that the peak at 290 nm is assigned to the colored species and the species can be oxidized.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 78, Issue 12, December 2009, Pages 1133-1136
Journal: Radiation Physics and Chemistry - Volume 78, Issue 12, December 2009, Pages 1133-1136
نویسندگان
Liyong Yuan, Jing Peng, Ling Xu, Maolin Zhai, Jiuqiang Li, Genshuan Wei,