Gemini surfactant behavior of conventional surfactant dodecyltrimethylammonium bromide with anionic azo dye Sunset Yellow in aqueous solutions
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Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elseiver
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, the interaction of an anionic azo dye Sunset Yellow with conventional cationic surfactant dodecyltrimethylammonium bromide (DTMABr) has been examined as a function of the dye concentration at 25 degrees C by electrical conductivity and UV-VIS spectroscopy measurements. Carpena's method, combined with Aguiar's approach, was applied to the analysis of the conductivity data for evaluating the micellization parameters such as critical micelle concentrations (cmc), degree of counterion bindings (beta), and micellization Gibbs free energies (Delta(mic)G) from the specific conductivity-surfactant concentration curves. The UV-VIS absorption spectroscopy measurements were performed to obtain information on the dye concentration dependence of the stacking properties of Sunset Yellow in water. The results indicated that although DTMABr is a conventional surfactant with a single alkyl chain, it shows gemini surfactant behavior at relatively high dye concentrations as a result of the surfactant-dye interactions. To the best of our knowledge, this is the first study that shows both the gemini surfactant behavior of DTMABr in the presence of SSY and J-aggregations of SSY at high SSY concentrations in the presence of DTMABr. Furthermore, in the presence of DTMABr, the SSY molecules at low concentrations form H-aggregates; they show J-aggregation at high concentrations. (C) 2022 Elsevier B.V. All rights reserved.
Açıklama
EA thanks the Scientific and Technological Research Council of Turkey (TUB_ITAK, grant number: 217Z079); Bolu Abant Izzet Baysal University Directorate of Research Projects Commission (BAP, grant number: 2021.03.03.1505) for supporting this work. ODL research was supported by the U.S. National Science Foundation (grant no: DMS-2106675). AMFN acknowledges financial support from INCT/CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico; Grant number: 465259/2014-6), INCT/FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo; Grant Number: 14/50983-3), INCT/CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior; Grant number: 88887.136373/2017-00), FAPESP (Thematic Project; Grant 2016/24531-3), and INCT-FCx (Instituto Nacional de Ciencia e Tecnologia de Fluidos Complexos).
Anahtar Kelimeler
Surfactant-Dye Interactions, Micellization Parameters, Carpena's Method, Critical Micelle Concentration, Sodium Dodecyl-Sulfate, Sulfonate Amphoteric Surfactant
Kaynak
Journal of Molecular Liquids
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
360
Sayı
Künye
Akpinar, E., Uygur, N., Topcu, G., Lavrentovich, O. D., & Neto, A. M. F. (2022). Gemini surfactant behavior of conventional surfactant dodecyltrimethylammonium bromide with anionic azo dye Sunset Yellow in aqueous solutions. Journal of Molecular Liquids, 360, 119556.
