کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9575308 | 1504345 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Studies on photodissociation of dibromoalkane in UV region
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The photodissociation of CH2Br2, 1,2-C2H4Br2 and 1,4-C4H8Br2 near 234 and 267 nm has been studied using resonance-enhanced multiphoton ionization with time-of-flight mass spectrometry. The wavelength dependence of the relative quantum yields ΦBr and ΦBrâ for both Br(2P3/20) and Brâ(2P1/20) channels was measured. The results indicated that the yields ΦBr of C2H4Br2 is larger than that of CH2Br2. And the quantum yields wavelength dependent of C4H8Br2 shows a different tendency compared to CH2Br2 and C2H4Br2. A likely explanation for the different quantum yields relies on the non-adiabatic transitions and avoided curve crossing mechanism. Additionally, ab initio calculations were performed to get potential energy surface curves of CH2Br2 to elucidate the photodissociation channels in UV region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 314, Issues 1â3, 18 July 2005, Pages 173-178
Journal: Chemical Physics - Volume 314, Issues 1â3, 18 July 2005, Pages 173-178
نویسندگان
Lei Ji, Ying Tang, Rongshu Zhu, Bifeng Tang, Bing Zhang,