کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5376344 | 1504324 | 2007 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photofragmentation of guanine, cytosine, leucine and methionine
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The photofragmentation spectra of guanine, cytosine, leucine and methionine were measured with noble gas resonance radiation at energies from 8.43 to 21.2Â eV, and the spectra are related to the published valence band photoemission spectra. As expected, lower photon energies lead to “softer” ionization and reduced fragmentation. For the nucleobases guanine and cytosine, photoionization below 16.67Â eV leads predominantly to the parent ion. The fragmentation pattern of leucine is similar to that of published spectra of other amino acids with aliphatic side chains, and whose outer orbitals are similar, with oxygen and nitrogen lone pair character. Methionine behaves very differently because the outer orbital has sulphur lone pair character, and reduced fragmentation is observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 334, Issues 1â3, 20 April 2007, Pages 53-63
Journal: Chemical Physics - Volume 334, Issues 1â3, 20 April 2007, Pages 53-63
نویسندگان
O. Plekan, V. Feyer, R. Richter, M. Coreno, M. de Simone, K.C. Prince,