کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9746599 | 1492397 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Site-specific fragmentation caused by core-level photoexcitation: Comparison between Si:1s and 2p photoexcitations in F3SiCH2CH2Si(CH3)3 vapor
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Site-specific fragmentation caused by core-level photoexcitation: Comparison between Si:1s and 2p photoexcitations in F3SiCH2CH2Si(CH3)3 vapor Site-specific fragmentation caused by core-level photoexcitation: Comparison between Si:1s and 2p photoexcitations in F3SiCH2CH2Si(CH3)3 vapor](/preview/png/9746599.png)
چکیده انگلیسی
Ionic fragmentation caused by Si:1s photoexcitation of 1-trifluorosilyl-2-trimethylsilylethane [F3SiCH2CH2Si(CH3)3] vapor was studied using monochromatized synchrotron radiation and a reflectron-type mass spectrometer. The total ion-yield spectrum in the Si:1s excitation region was found to be very similar to the superposition of the ion-yield spectra of Si(CH3)4 and SiF4, showing that site-specific excitation occurred in this molecule. When the photon energy was scanned from low to high, the 1s â Ï* excitation at the Si atom bonded to three CH3 groups suppressed the production of CH3+ and SiCH3+. The 1s â Ï* excitation at the Si atom bonded to three F atoms, on the other hand, enhanced the production of F+ and SiF+ and suppressed the production of SiF3+. These results suggest that Si:1s site-specific excitation causes site-specific fragmentation. The fragmentation caused by Si:1s â Ï* photoexcitation was also found to be more violent than that caused by Si:2p â Ï* photoexcitation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 247, Issues 1â3, 1 December 2005, Pages 101-105
Journal: International Journal of Mass Spectrometry - Volume 247, Issues 1â3, 1 December 2005, Pages 101-105
نویسندگان
Shin-ichi Nagaoka, Asuka Tamura, Akiko Fujii, Joji Ohshita, Kazumasa Okada, Toshio Ibuki, Isao H. Suzuki, Haruhiko Ohashi, Yusuke Tamenori,