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Proceedings Paper

Spectroscopic studies of asphaltenes
Author(s): Sonia Goncalves Abreu; Jannett Hung; Hector M. Gutierrez; Alberto Fernandez; Jimmy A. Castillo
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Paper Abstract

Molecular absorption and fluorescence studies of Asphaltenes in toluene solution and thin films absorbed onto glass plates were carried out. The fluorescence was induced by two different type of laser: a CW Ar+ and Nd-Yag laser. A red shifted was observed in both: fluorescence and absorption spectra, which can be attributed to asphaltenes aggregation. Experiments made with sample films in glass plate with the 532 nm Nd-Yag laser, shows a very narrow band at 566.1 nm (1126 cm-1) but with higher relative intensity compare to those obtained with CW laser, which is attributed to a Raman line. This signal can be employed to perform adsorption studies onto solid surfaces.

Paper Details

Date Published: 25 October 1999
PDF: 8 pages
Proc. SPIE 3784, Rough Surface Scattering and Contamination, (25 October 1999); doi: 10.1117/12.366722
Show Author Affiliations
Sonia Goncalves Abreu, Univ. Central de Venezuela (Venezuela)
Jannett Hung, Univ. Central de Venezuela (Venezuela)
Hector M. Gutierrez, Univ. Central de Venezuela (United States)
Alberto Fernandez, Univ. Central de Venezuela (Venezuela)
Jimmy A. Castillo, Univ. Central de Venezuela (Venezuela)

Published in SPIE Proceedings Vol. 3784:
Rough Surface Scattering and Contamination
Zu-Han Gu; Philip T. C. Chen; Zu-Han Gu; Alexei A. Maradudin; Alexei A. Maradudin, Editor(s)

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