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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2008, Volume 59, Issue 8,

https://doi.org/10.37358/RC.08.8.1914

Simona Gabriela Muntean, Georgeta Maria Simu, Ludovic Kurunczi, Zoltan Szabadai

Experimental and Mathematical Study of the Aggregation of a Green Trisazo Direct Dye

Abstract:

Dye ions have a tendency to self-associate in aqueous solutions. The main macroscopic factors influencing the aggregation are: dye concentration, electrolyte concentration, and temperature. In the present work, the aggregation characteristics of a trisazo direct dye (VD) have been investigated by spectrophotometric and mathematical analysis. The molecular aggregation of VD dye has been studied in aqueous solutions as a function of dye concentration (1.077.10-3 ¸ 8.975.10-6 M) and solution pH (4 ¸ 10). As the concentration increases, the spectra flattening out as well as a second peak begins to form off the main one signifying that the molecules are beginning to aggregate. The variation of the solution pH, determines a change of the spectral maximum, which confirms the aggregation of the studied dye. The mathematical processing of the data confirms the presence of three species in the studied range of concentration.

Keywords:
trisazo dye; dye aggregation; absorption matrix

Issue: 2008, Volume 59, Issue 8
Pages:
Publication date: 2008/9/9
https://doi.org/10.37358/RC.08.8.1914
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