کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5410190 | 1506560 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Inelastic neutron scattering study on boson peaks of imidazolium-based ionic liquids
ترجمه فارسی عنوان
بررسی پراکندگی ناپایدار بر روی قله بوسون از مایعات یونی مبتنی بر ایزادولی
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کلمات کلیدی
مایع یونی، پراکندگی نوترون ناپایدار، اوج بسون، شیشه، 00-01، 99-00،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Low energy excitations of 1-alkyl-3-methylimidazolium ionic liquids (ILs) have been investigated by means of neutron spectroscopy. In the spectra of inelastic scattering, a broad excitation peak referred to as a “boson peak” appeared at 1-3Â meV in all of the ILs measured. The intensity of the boson peak was enhanced at the Q positions corresponding to the diffraction peaks, reflecting the in-phase vibrational nature of the boson peak. Furthermore the boson peak energy (EBP) was insensitive to the length of the alkyl-chain but changed depending on the radius of the anion. From the correlation among EBP, the anion radius, and the glass transition temperature Tg, we conclude that both EBP and Tg in ILs are predominantly governed by the inter-ionic Coulomb interaction which is less influenced by the alkyl-chain length. We also found that the EBP is proportional to the inverse square root of the molecular weight as observed in molecular glasses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 210, Part B, October 2015, Pages 164-168
Journal: Journal of Molecular Liquids - Volume 210, Part B, October 2015, Pages 164-168
نویسندگان
Maiko Kofu, Yasuhiro Inamura, Yosuke Moriya, Andrey Podlesnyak, Georg Ehlers, Osamu Yamamuro,