کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1194840 | 1492396 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molecular hydrogen ion elimination from alkyl iodides under strong laser beam irradiation
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The elimination of H2+ from alkyl iodides under strong (up to 5 Ã 1015 W cmâ2) laser irradiation is studied by means of time-of-flight mass spectrometry. The study has been performed by using 60 fs (λ = 800 nm) and 35 ps (λ = 1064, 532, 355 and 266 nm) laser pulses. It is concluded that the H2+ ions are ejected from ionic states via Coulomb explosion processes. The molecular rearrangement leading to H2+ formation is attributed to a tunneling process through a H transfer barrier. For the case of methyl iodide, about 10% of the doubly charged parent ions undergo molecular rearrangement. From a comparison of the H2+/H+ ion yield ratio of the studied molecules, it turns out that the H2+ formation from H atoms bonded to a terminal carbon atom is more efficient than that arising from H atoms bonded to central C atoms of the molecular chain.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 248, Issues 1â2, 1 January 2006, Pages 1-8
Journal: International Journal of Mass Spectrometry - Volume 248, Issues 1â2, 1 January 2006, Pages 1-8
نویسندگان
C. Kosmidis, S. Kaziannis, P. Siozos, A. Lyras, L. Robson, K.W.D. Ledingham, P. McKenna, D.A. Jaroszynski,