The generation of singlet oxygen by petroleum and its fractions
- 作者：Rodrigo José ; Corrê ; a ; rcorrea@iq.ufrj.br ; Divinomar Severino ; Rodrigo da Silva Souza ; Elizabete Francisca de Santana ; Lí ; via L. Mauro ; Suyane D.S. Alvarenga ; David E. Nicodem
- 关键词：Singlet oxygen ; Petroleum ; NIR phosphorescence ; Laser flash photolysis
- 刊名：Journal of Photochemistry and Photobiology A ; Chemistry
- 出版年：2012
- 期刊代码：66_10106030
- 类别：ch
- 出版时间：15 May, 2012
- 卷：236
- 期：Complete
- 页码：9-13
- 文件大小：350 K
摘要
Quantum yields of singlet oxygen formation by diesel oil, samples of four different crude petroleum and some fractions of a Brazilian intermediate petroleum were measured at 315 nm, 355 nm, 400 nm and 450 nm both by pulsed LASER or Xe lamp, with analysis of singlet oxygen emission at 1270 nm. All samples generated singlet oxygen in dilute solution. Diesel oil has the highest quantum yield (0.49) and a Venezuelan crude the poorest (0.17). The aromatic, polar, asphaltene and maltene fractions of the Brazilian crude all generate singlet oxygen. Singlet oxygen formation was also observed when undiluted crude petroleum was analyzed.