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19 November 2003 Evidence of molecular aggregation of asphaltenes by using induced laser fluorescence technique
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Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.530770
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy
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.
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Sonia Goncalves Abreu, Jimmy A. Castillo, Alberto Fernandez, and S. Acevedo "Evidence of molecular aggregation of asphaltenes by using induced laser fluorescence technique", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.530770
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