New chemical evidence for the ability to generate radical molecular ions of polyenes from ESI and HR-MALDI mass spectrometry.
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.
Guaratini
Thais
T
Universidade de São Paulo, Faculdade de Ciências Farmaceuticas de Ribeirão Preto, Via do Café S/N, CEP 14040-903, Ribeirão Preto-SP, Brazil.
Vessecchi
Ricardo L
RL
Lavarda
Francisco C
FC
Maia Campos
Patricia M B G
PM
Naal
Zeki
Z
Gates
Paul J
PJ
Lopes
Norberto P
NP
D000818:Animals; D002338:Carotenoids / Q000032:analysis*; D012176:Retinoids / Q000032:analysis*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods
D012176:Retinoids; D002338:Carotenoids