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Proceedings Paper

Evidence of molecular aggregation of asphaltenes by using induced laser fluorescence technique
Author(s): Sonia Goncalves Abreu; Jimmy A. Castillo; Alberto Fernandez; S. Acevedo
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Paper Abstract

Fluorescence spectroscopy provides a powerful method in studies investigates complex molecules. In this work we present some fluorescence studies about molecular aggregation of asphaltenes in toluene and tethahidrofuran (thf) solution were carried out. The fluorescence was induced by a CW Ar+ laser (λexc = 514.5 nm). At low concentration (< 500 mgL-1) no red shift was observed in fluorescence spectra, but the dependence of the fluorescence intensity with the solution concentration have a linear increase below 50 mgL-1, then, for higher samples concentration a dramatical dismished as the concentration increased is observed, which can attributed to the asphaltene aggregation.

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.530770
Show Author Affiliations
Sonia Goncalves Abreu, Univ. Central de Venezuela (Venezuela)
Jimmy A. Castillo, Univ. Central de Venezuela (Venezuela)
Alberto Fernandez, Univ. Central de Venezuela (Venezuela)
S. Acevedo, Univ. Central de Venezuela (Venezuela)


Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

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