Spectroscopic studies of asphaltenes

Sonia Goncalves Abreu; Jannett Hung; Hector M. Gutierrez; Alberto Fernandez; Jimmy A. Castillo

doi:10.1117/12.366722

25 October 1999 Spectroscopic studies of asphaltenes

Sonia Goncalves Abreu, Jannett Hung, Hector M. Gutierrez, Alberto Fernandez, Jimmy A. Castillo

Proceedings Volume 3784, Rough Surface Scattering and Contamination; (1999) https://doi.org/10.1117/12.366722
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

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.

Citation Download Citation

Sonia Goncalves Abreu, Jannett Hung, Hector M. Gutierrez, Alberto Fernandez, and Jimmy A. Castillo "Spectroscopic studies of asphaltenes", Proc. SPIE 3784, Rough Surface Scattering and Contamination, (25 October 1999); https://doi.org/10.1117/12.366722

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