Studies of the Association of Dyes with Surfactants in Aqueous Solutions: Spectrophotometry and Computer Simulation
Тип публікації :
Стаття
Дата випуску :
2019
Автор(и) :
Shapovalov, Serghey
Ponomariov, Vadim
Mosharenkova, Oryna
Butenko, Sophia
Мова основного тексту :
Англійська
eKNUTSHIR URL :
Том :
7
Випуск :
2
ISSN :
2312-3222
Початкова сторінка :
9
Кінцева сторінка :
19
Цитування :
[APA 7] Shapovalov, S., Ponomariov, V., Mosharenkova, O., & Butenko, S. (2019). Studies of the Association of Dyes with Surfactants in Aqueous Solutions: Spectrophotometry and Computer Simulation. French-Ukrainian Journal of Chemistry, 7(2), 9–19. https://doi.org/10.17721/fujcV7I2P9-19
[ДСТУ] Studies of the Association of Dyes with Surfactants in Aqueous Solutions: Spectrophotometry and Computer Simulation / S. Shapovalov et al. French-Ukrainian Journal of Chemistry. 2019. Vol. 7, no. 2. P. 9—19. DOI: 10.17721/fujcV7I2P9-19 (date of access: 25.07.2026).
The association of cationic dye (pinacyanol, PC) with anionic dyes (ethyleosin, EE, or rhodamine 200 C, R200C), and also the interaction “dye+surfactant” has been investigated in aqueous solutions by visible spectroscopy and computer simulation. Cetylpyridinium bromide (CPB), sodium dodecylsulfate (SDS) and triton X-100 (TX) were used as cationic, anionic and non-ionic surfactants respectively. The formation of “dye+surfactant” associates takes place at low dye concentrations (≥10‑6 M) and concentrations of surfactant, which are much smaller than the critical micelle concentrations (CMC). In contrast, similar concentrations (10‑6 – 10‑4 M) of small cations of tetramethylammonium or tetraethylammonium have no noticeable effect on the absorption spectra of the dye in the “dye+tetraalkylammonium salt” systems; it indicates the absence of formation of new compound between the dye and salt. The standard enthalpy of formation of “dye+dye” or “dye+surfactant” associates has been determined by AM1 and PM3 semiempirical methods. The computer simulation confirms that the formation of these associates is energetically beneficial.
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