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New chemical evidence for the ability to generate radical molecular ions of polyenes from ESI and HR-MALDI mass spectrometry.

Tipo de material: TextoTextoSeries ; Analyst, 129(12), p.1223-1226, 2004Trabajos contenidos:
  • Guaratini, T
  • Vessecchi, R. L
  • Lavarda, F. C
  • Campos, P. M. M
  • Naal, Z
  • Gates, P. J
  • Lopes, N. P
Tema(s): Recursos en línea: Resumen: We report here new chemical evidence for the generation of radical molecular ions of compounds with a conjugated ?-system (polyene)in ESI and HR-MALDI mass spectrometry. The oxidation potential of the neutral polyenes was calculated by cyclic-voltammetry and the results compared with those previously published for other complex conjugated compounds that have also been shown to form M?+ in ESI-MS. This study clearly demonstrates the correlation between the oxidation potential and the formation of the M?+ for the polyenes studied.
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We report here new chemical evidence for the generation of radical molecular ions of compounds with a conjugated ?-system (polyene)in ESI and HR-MALDI mass spectrometry. The oxidation potential of the neutral polyenes was calculated by cyclic-voltammetry and the results compared with those previously published for other complex conjugated compounds that have also been shown to form M?+ in ESI-MS. This study clearly demonstrates the correlation between the oxidation potential and the formation of the M?+ for the polyenes studied.

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