New chemical evidence for the ability to generate radical molecular ions of polyenes from ESI and HR-MALDI mass spectrometry |
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| Authors: | Guaratini Thais Vessecchi Ricardo L Lavarda Francisco C Maia Campos Patricia M B G Naal Zeki Gates Paul J Lopes Norberto P |
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| Institution: | Universidade de S?o Paulo, Faculdade de Ciências Farmaceuticas de Ribeir?o Preto, Via do Café S/N, CEP 14040-903, Ribeir?o Preto-SP, Brazil. |
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| Abstract: | We report here new chemical evidence for the generation of radical molecular ions of compounds with a conjugated pi-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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