info:eu-repo/semantics/article
Singlet oxygen production by a crude oil from the San Jorge Gulf Basin, Argentina
Fecha
2018-11Registro en:
López, Rosmari Marisa; Mangani, Adriana del Luján; Arbeloa, Ernesto Maximiliano; Luiz, Marta Mabel; Gutiérrez, María Isela; Singlet oxygen production by a crude oil from the San Jorge Gulf Basin, Argentina; Wiley Blackwell Publishing, Inc; Photochemistry and Photobiology; 94; 6; 11-2018; 1138-1142
0031-8655
CONICET Digital
CONICET
Autor
López, Rosmari Marisa
Mangani, Adriana del Luján
Arbeloa, Ernesto Maximiliano
Luiz, Marta Mabel
Gutiérrez, María Isela
Resumen
The quantum yields for singlet oxygen production by diluted solutions of an Argentine crude oil and its SARA (saturates, aromatics, resins and asphaltenes) fractions were obtained by direct detection of the characteristic phosphorescence following monochromatic excitation at 355 nm. The most efficient sensitizers of singlet oxygen in organic media are crude oil, maltenes and aromatics fractions (values of singlet oxygen quantum yield are around 0.7), and resins (values around 0.1) are the poorest. Also, the quenching of singlet oxygen by the crude oil and its fractions was investigated; the asphaltenes and the petroleum are relatively efficient quenchers of singlet oxygen.