Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10558207 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2005 | 13 Pages |
Abstract
The effect of solvents, halo substituents and surfactants on the aggregation of xanthene dyes (fluorescein and eosin Y) has been investigated. It has been found that polar protic solvents promote the aggregation of both the dyes while polar aprotic solvents hinder the aggregation process. Apolar solvents can disintegrate the aggregates previously formed in aqueous medium. The nature of the driving forces for aggregation in the two dyes is different. Surfactants bearing charge opposite to the dye molecules facilitate aggregation. These observations bear direct relevance to the possible use of fluorescein and eosin Y as quantum yield standards, photosensitizers, laser dyes and biological labels.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Swati De, Susmita Das, Agnishwar Girigoswami,