کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1196006 | 964441 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reduction of Cationic Free-Base meso-Tris-N-Methylpyridinium-4-yl Porphyrins in Positive Mode Electrospray Ionization Mass Spectrometry
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Reductions involving more than one electron with formation of the M+ and [M+2H]+ ions were observed for electrosprayed meso-tris(N-methylpyridinium-4-yl)porphyrin iodides, MI3. These reductions were studied by using different solvents and flow rates. Formation of the [M+2H]+ ions occurred only for protic solvents and to a larger extent at lower flow rates. The type of the fourth substituent does not seem to affect the reduction processes. Formation of the two reduced species, M+ and [M+2H]+ ions, may occur through the participation of counter ion/solvent clusters. Reduction of multiply charged, non-metallated species with formation of [M+nH]+ ions (n > 1) was not observed before in positive mode electrospray mass spectrometry.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the American Society for Mass Spectrometry - Volume 18, Issue 4, April 2007, Pages 762–768
Journal: Journal of the American Society for Mass Spectrometry - Volume 18, Issue 4, April 2007, Pages 762–768
نویسندگان
Catarina I.V. Ramos, M. Graça Santana Marques, A.J. Ferrer Correia, Vanda Vaz Serra, João P.C. Tomé, Augusto C. Tomé, M. Graça P.M.S. Neves, J.A.S. Cavaleiro,