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Journal articles on the topic 'Azo-surfactant'

Author: Grafiati

Published: 4 February 2023

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1

Shahi, Neelam, Kumar Shah, Prasad Yadav, and Ajaya Bhattarai. "The spectral study of azo dye and cationic surfactant interaction in ethanol-water mixture." Journal of the Serbian Chemical Society 86, no. 5 (2021): 483–94. http://dx.doi.org/10.2298/jsc201116020s.

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The interaction of the azo dye methyl red (MR) with dodecyl trimethyl ammonium bromide (DTAB) has been studied by the spectrometric methods through the azo-hydrazone tautomeric behaviour of MR for a series of the ethanol?water system (0.1, 0.2, 0.3 and 0.4 volume fractions of ethanol) at room temperature. The critical micelle concentration was determined using the conductometric technique with the increased ethanol volume, influenced by the solvent polarity and the architectural flexibility of methyl red. The azo form of methyl red brings the electrostatic interaction with the cationic surfactant through the adsorption phenomenon. The binding parameters were calculated with the aid of a modified Benesi?Hildebrand equation.

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2

Abdallah, Dalia, Matthew J. Cully, Yuzhuo Li, and Devon A. Shipp. "Stoichiometric complexes of polyelectrolyte and azo-functionalized surfactant." Colloid and Polymer Science 286, no. 6-7 (January 8, 2008): 739–45. http://dx.doi.org/10.1007/s00396-007-1827-1.

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3

Liu, Z., D. A. Edwards, and R. G. Luthy. "Nonionic Surfactant Sorption onto Soil." Water Science and Technology 26, no. 9-11 (November 1, 1992): 2337–40. http://dx.doi.org/10.2166/wst.1992.0731.

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Experiments in batch soil/aqueous systems were conducted to evaluate the sorption onto soil of four nonionic surfactants. At bulk solution surfactant concentration less than the respective critical micelle (aggregate) concentration (CMC or CAC), sorption can be assessed using a surface tension technique and can be characterized with a Freundlich isotherm. At bulk solution surfactant concentrations equal to or greater than the critical concentration, sorption of the micelle-forming surfactants can be assessed by a spectrophotometric technique with an azo dye and had a constant value; sorption of the lamellae-forming surfactant can be assessed by a chemical oxidation technique and, however, appeared to be an increasing function of the surfactant dose.

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4

Czajka, A., G. Liao, O. O. Mykhaylyk, and S. P. Armes. "In situ small-angle X-ray scattering studies during the formation of polymer/silica nanocomposite particles in aqueous solution." Chemical Science 12, no. 42 (2021): 14288–300. http://dx.doi.org/10.1039/d1sc03353k.

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SAXS is used to study the formation of polymer/silica nanocomposite particles prepared by surfactant-free aqueous emulsion polymerization of 2,2,2-trifluoroethyl methacrylate in the presence of silica nanoparticles using a azo initiator at 60 °C.

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5

Darbandi, Fatemeh, Azadeh Mousavi, Tayebe Bagheri Lotfabad, Amir Heydarinasab, and Soheila Yaghmaei. "Azo dye removal via surfactant-assisted polyvinylidene fluoride membrane." Environmental Health Engineering and Management 8, no. 1 (February 15, 2021): 25–32. http://dx.doi.org/10.34172/ehem.2021.04.

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Background: Recently, concerns have been raised regarding the environmental and public health safety of azo dyes, the most widely used synthetic dyes. The membrane technique has been introduced as one of the efficient methods for dye removal treatments. Polyvinylidene fluoride (PVDF) membrane manipulated by surfactants was studied for removal of the azo dye, carmoisine. Methods: PVDF membrane was prepared via non-solvent-induced phase separation (NIPS) and used to remove the azo dye, carmoisine. Three nonionic surfactants including Tween 20, Tween 60, and Tween 80 were used individually as additives in casting solutions to improve PVDF membrane properties. Results: Fourier-transform infrared spectroscopy (FTIR) demonstrated the presence of functional groups of carbonyl (C=O) and hydroxyl (OH), assigned to Tween molecules, in the membrane chemical structure. All Tween species caused a decrease in the surface hydrophobicity of PVDF membranes illustrated by the reduced contact angles. Each Tween at a 2% concentration in the dope solution led to an increase in the pore-size of PVDF membranes, which was estimated by scanning electron microscopy (SEM). However, this impact was reversed at Tween concentrations of 4%. Membranes were assessed for dye removal efficiency and permeate flux in a cross-flow system. Permeability of PVDF membranes improved (~78%) with adding Tween 80 at a concentration of 2%. Tween 60 at a 2% concentration resulted in a ~45% increase in dye removal efficiency of PVDF membranes. And, atomic force microscopy (AFM) showed that Tween 60 increased membrane surface roughness. Conclusion: Surfactant-mediated changes in the surface properties of PVDF membrane improved dye removal efficacy.

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6

Ghoreishi, Sayed Mehdi, Mohsen Behpour, and Mehdi Shabani-Nooshabadi. "Interaction of anionic azo dye and TTAB: cationic surfactant." Journal of the Brazilian Chemical Society 20, no. 3 (2009): 460–65. http://dx.doi.org/10.1590/s0103-50532009000300008.

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7

Favaro, Yvette L., and Vincent C. Reinsborough. "Micellar catalysis in mixed anionic/cationic surfactant systems." Canadian Journal of Chemistry 72, no. 12 (December 1, 1994): 2443–46. http://dx.doi.org/10.1139/v94-310.

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Dye solubility and stopped-flow kinetic studies were conducted in sodium dodecylsulfate/dodecyltrimethylammonium bromide and sodium dodecylsulfate/decyltrimethylammonium bromide micellar solutions with excess anionic surfactant. The enhanced rate in the presence of anionic micelles of the Ni2+(aq)/pyridine-2-azo-p-dimethylaniline (PADA) complexation reaction was used as a probe of the mixed micellar situation. PADA solubilities and the kinetic parameters derived through the Robinson model for micellar catalysis were consistent with a complete incorporation of the cationic surfactant into the sodium dodecylsulfate micelles.

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8

Wu, Yaming, Yuhai Liu, Jianxiang Chen, and Runmiao Yang. "Synthesis, Self-Assembly and Photoresponsive Behavior of Liquid Crystals Based on Azobenzene." Crystals 11, no. 12 (December 14, 2021): 1560. http://dx.doi.org/10.3390/cryst11121560.

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A new amphiphilic surfactant (C4-Azo-C5-HDA) was formed by liquid crystals (LCs) based on azobenzene, whose structures were characterized by 1H-NMR spectroscopy. The reversible hydrogelation upon changes in temperature and light exposure was also studied. Under the irradiation of UV light, the trans-isomer of C4-Azo-C5-HDA rapidly photoisomerized to the cis-isomer, resulting in rapid disruption of the gel. The thermotropic liquid crystal behavior of the gelator was investigated via Differential Scanning Calorimetry (DSC) and Polarizing Optical Microscopy (POM). The biocompatibility experiment of multi-stimulus response of the liquid crystal provides a potential driving force for the development of biomaterials.

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9

Armagan, Bulent, Orhan Ozdemir, Mustafa Turan, and Mehmet S. Çelik. "Adsorption of Negatively Charged Azo Dyes onto Surfactant-Modified Sepiolite." Journal of Environmental Engineering 129, no. 8 (August 2003): 709–15. http://dx.doi.org/10.1061/(asce)0733-9372(2003)129:8(709).

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10

Al- Mammar, Dunya Edan. "Characteristics of azo-dye onto surfactant modified chromium contained leather waste." IOSR Journal of Applied Chemistry 7, no. 2 (2014): 83–92. http://dx.doi.org/10.9790/5736-07218392.

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11

Bayat, Izadan, Molina, Sánchez, Santiago, Semnani, Dinari, Guirado, Estrany, and Alemán. "Electrochromic Self-Electrostabilized Polypyrrole Films Doped with Surfactant and Azo Dye." Polymers 11, no. 11 (October 25, 2019): 1757. http://dx.doi.org/10.3390/polym11111757.

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Two azo dyes, acid red 1 (AR1) and acid red 18 (AR18), were used alone or in combination with sodium dodecyl sulfate (SDS) for the electropolymerization of a pyrrole monomer. Polypyrrole (PPy) showed higher redox capacity when SDS and AR18 were used simultaneously as dopant agents (PPy/AR18-SDS) than when the conducting polymer was produced in the presence of SDS, AR18, AR1, or an AR1/SDS mixture. Moreover, PPy/AR18-SDS is a self-stabilizing material that exhibits increasing electrochemical activity with the number of oxidation–reduction cycles. A mechanism supported by scanning electron microscopy and X-ray diffraction structural observations was proposed to explain the synergy between the SDS surfactant and the AR18 dye. On the other hand, the Bordeaux red color of PPy/AR18-SDS, which exhibits an optical band gap of 1.9 eV, rapidly changed to orange-yellow and blue colors when films were reduced and oxidized, respectively, by applying linear or step potential ramps. Overall, the results indicate that the synergistic utilization of AR18 and SDS as dopant agents in the same polymerization reaction is a very successful and advantageous strategy for the preparation of PPy films with cutting-edge electrochemical and electrochromic properties.

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12

Akbaş, Halide, and Melike Aydemir. "Interfacial and micellar properties of anionic azo dye-surfactant binary systems." Colloid Journal 70, no. 5 (October 2008): 541–48. http://dx.doi.org/10.1134/s1061933x08050025.

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13

Ogino, Keizo, Hirotaka Uchiyama, Mitsuo Ohsato, and Masahiko Abe. "Fading phenomenon of azo oil dye in anionic-nonionic surfactant solutions." Journal of Colloid and Interface Science 116, no. 1 (March 1987): 81–87. http://dx.doi.org/10.1016/0021-9797(87)90100-7.

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14

Nazar, Muhammad Faizan, Syed Sakhawat Shah, and Muhammad Arshad Khosa. "Interaction of Azo Dye with Cationic Surfactant Under Different pH Conditions." Journal of Surfactants and Detergents 13, no. 4 (January 22, 2010): 529–37. http://dx.doi.org/10.1007/s11743-009-1177-8.

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15

Oakes, John, Peter Gratton, and Sarah Dixon. "Solubilisation of dyes by surfactant micelles. Part 3; A spectroscopic study of azo dyes in surfactant solutions+." Coloration Technology 119, no. 5 (September 2003): 301–6. http://dx.doi.org/10.1111/j.1478-4408.2003.tb00188.x.

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16

Connolly, TJ, VC Reinsborough, and XY Xiang. "Solubilization of pada in Hydrocarbon Fluorocarbon Surfactant Mixtures." Australian Journal of Chemistry 45, no. 4 (1992): 769. http://dx.doi.org/10.1071/ch9920769.

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Solubilities of pyridine-2-azo-p-dimethylaniline ( pada ) were determined at 25�C in four mixed fluorocarbon/hydrocarbon short-chained surfactant systems: ( i ) sodium decyl sulfate/sodium perfluoroheptanoate; (ii) sodium octanesulfonate /sodium perfluorooctanoate ; (iii) sodium octanesulfonate /sodium perfluoroheptanoate ; (iv) sodium nonanesulfonate /sodium perfluoroheptanoate. Systems ( i ), (iii) and (iv) showed micellar miscibility (one mixed micelle) and synergistic solubilization effects. System (ii) had two critical micelle concentrations pointing to two micellar forms in solution, and no synergism could be detected. From these four examples, it is deduced that single mixed micelles are formed when the critical micelle concentrations of the pure surfactants are within a factor of 3 of each other.

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17

Thani, Mohammed Z., Safaa A. Dadoosh, Abbas S. Fahad, Asmaa M. Abdullah, and Younus S. Fahad. "Synthesis of New Azo Compound and its Application for Spectrophotometric Determination of Sulfamethoxazole and Extraction using Cloud Point Extraction." INTERNATIONAL JOURNAL OF DRUG DELIVERY TECHNOLOGY 12, no. 03 (June 30, 2022): 1311–18. http://dx.doi.org/10.25258/ijddt.12.3.63.

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In this study, we synthesized new sulfamethoxazole azo derivative by converted the SMZ drug to diazonium salt and coupling it with salbutamol in the alkaline medium to form an orange water-soluble azo dye that has a maximum absorption at λmax 450 nm. This reaction was used in the spectrophotometric determination of SMZ drug. It was obeyed to beer-lambert,s low over concentration between (10–100 mg.L-1) with LOD (0.507 mg.L-1), LOQ (1.5 mg.L-1) and molar absorptivity (2332.2 L.mol-1.cm-1). The approach indicated great sensitivity for the assessment of chosen medicine. Another method, a new cloud point extraction approach, was successfully used to extract the SMZ medication in its pure form as well as in pharmaceutical formulations. Due to its features and structure, non-ionic surfactant, also known as 2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy] ethanol, was chosen as the green extraction solvent in this study. The effect of several parameters on the CPE of Sulfamethoxazole, including as the type and volume of surfactant, salt, temperature, and incubation duration, was thoroughly researched, and a set of ideal conditions was established. The correlation coefficient (R2) for the calibration curve was found to be 0.9956. The limit of detection (LOD), limit of quantitation (LOQ) and molar absorptivity were 0.122 mgL-1, 0.403 mg.L-1 and 11319.41 L.mol-1.cm-1, respectively.

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18

Petrossian, Artem, and Stefania Residori. "Nonlinear Optics: Surfactant Enhanced Optical Reorientation in Azo-Dye- Doped Liquid Crystals." Optics and Photonics News 13, no. 12 (December 1, 2002): 32. http://dx.doi.org/10.1364/opn.13.12.000032.

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19

Hamada, Kunihiro, Masumi Nishizawa, Daisuke Yoshida, and Masaru Mitsuishi. "Degradation of an azo dye by sodium hypochlorite in aqueous surfactant solutions." Dyes and Pigments 36, no. 4 (March 1998): 313–22. http://dx.doi.org/10.1016/s0143-7208(97)00030-2.

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20

Torres‐Pérez, J., M. Solache‐Ríos, and M. T. Olguín. "Sorption of Azo Dyes onto a Mexican Surfactant‐Modified Clinoptilolite‐Rich Tuff." Separation Science and Technology 42, no. 2 (February 2007): 299–318. http://dx.doi.org/10.1080/01496390601069879.

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21

Uchiyama, H., M. Abe, and K. Ogino. "Fading phenomena of azo oil dye in anionic-nonionic surfactant solutions III. The effect of solubilizates on the fading behavior of azo oil dye in mixed surfactant systems." Colloid & Polymer Science 265, no. 9 (September 1987): 838–44. http://dx.doi.org/10.1007/bf01418461.

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22

Connolly, Terrence J., and Vincent C. Reinsborough. "Micellar rate enhancement studies in mixed sodium fluorocarbon/hydrocarbon surfactant solutions." Canadian Journal of Chemistry 70, no. 6 (June 1, 1992): 1581–85. http://dx.doi.org/10.1139/v92-194.

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Stopped-flow kinetic studies were conducted in mixed micellar solutions of fluorocarbon and hydrocarbon anionic surfactants to determine the prevalent micellar form. The probe reaction was the Niaq2+/pyridine-2-azo-p-dimethylaniline (PADA) complexation, which is many times accelerated in the presence of anionic micelles. Binding constants for Niaq2+ and PADA partitioning between bulk solution and micelles were determined through the murexide technique and solubility measurements respectively and the molar reaction volume was obtained from the Robinson equation. The three binary surfactant systems investigated had sodium perfluoroheptanoate as the fluorocarbon surfactant while the hydrocarbon surfactants were sodium decylsulfate, sodium nonanesulfonate, and sodium octanesulfonate. The kinetic results were consistent with unimicellar composition in all three systems which was not the behaviour previously found with the sodium octane sulfonate/sodium perfluoroctanoate system. The difference was attributed to closer similarity in the surfactant pair hydrophobicities as revealed through their critical micelle concentrations. Another finding was that mixed micelles synergistically can lead to a much greater solubilization of PADA than is possible through either of the pure surfactants.

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23

Kobayashi, Shiro, and Hiroshi Uyama. "Solubilization of Azo Dye by Nonionic Poly(2-oxazoline) Surfactant in Aqueous Solution." Polymer Journal 23, no. 8 (August 1991): 1015–17. http://dx.doi.org/10.1295/polymj.23.1015.

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24

Yang, Zhenglong, Hongzheng Chen, Lei Cao, and Mang Wang. "Preparation and photoconductivity study of azo nanoparticles via liquid phase surfactant-assisted reprecipitation." Journal of Materials Science 39, no. 11 (June 2004): 3587–91. http://dx.doi.org/10.1023/b:jmsc.0000030710.28407.0a.

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25

ABE, Masahiko, Mitsuo OHSATO, Hirotaka UCHIYAMA, Nobuyuki TSUBAKI, and Keizo OGINO. "Protonation Equilibrium of Azo Oil Dye in the Aqueous Solutions of Mixed Surfactant Systems." Journal of Japan Oil Chemists' Society 35, no. 7 (1986): 522–28. http://dx.doi.org/10.5650/jos1956.35.522.

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26

Pendse, Anuradha, Rasika Mhatre, and K. Aruna. "Optimization of bio-surfactant production by Azo-rhizobium strain isolated from oil-contaminated soil." GSC Biological and Pharmaceutical Sciences 3, no. 3 (June 30, 2018): 035–46. http://dx.doi.org/10.30574/gscbps.2018.3.3.0040.

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27

Karukstis, Kerry K., Jonathan P. Litz, Matthew B. Garber, Laura M. Angell, and George K. Korir. "A spectral approach to determine location and orientation of azo dyes within surfactant aggregates." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 75, no. 4 (April 2010): 1354–61. http://dx.doi.org/10.1016/j.saa.2009.12.087.

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28

MENEK, N., E. EREN, and S. TOPCU. "Kinetic investigation of an azo dye oxidation by hydrogen peroxide in aqueous surfactant solution." Dyes and Pigments 68, no. 2-3 (2006): 205–10. http://dx.doi.org/10.1016/j.dyepig.2005.01.010.

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29

Hayashita, T., T. Kurosawa, T. Miyata, K. Tanaka, and M. Igawa. "Effect of structural variation within cationic azo-surfactant upon photoresponsive function in aqueous solution." Colloid & Polymer Science 272, no. 12 (December 1994): 1611–19. http://dx.doi.org/10.1007/bf00664729.

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30

Yam, Vivian Wing-Wah, Yu Yang, Jiaxin Zhang, Ben Wai-Kin Chu, and Nianyong Zhu. "Synthesis, Characterization, and Photoisomerization Studies of Azo- and Stilbene-Containing Surfactant Rhenium(I) Complexes." Organometallics 20, no. 23 (November 2001): 4911–18. http://dx.doi.org/10.1021/om010192m.

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31

Sharma, Ajit K., and Byeong-Kyu Lee. "Surfactant-aided sol-gel synthesis of TiO2–MgO nanocomposite and their photocatalytic azo dye degradation activity." Journal of Composite Materials 54, no. 12 (March 21, 2016): 1561–70. http://dx.doi.org/10.1177/0021998316636464.

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In this work, a surfactant-aided TiO2–MgO nanocomposite (Ti-M-S) was successfully synthesized by a sol-gel process with the aid of sodium dodecyl sulfate as a structure-directing anionic surfactant. The results demonstrated the effectiveness of this approach for controlling both the amount and the distribution of MgO nanoparticles within the TiO2 framework after calcination. The photocatalytic activity of the synthesized nanocomposite for degradation of methyl orange (MO) and methylene blue (MB) dyes used as a model wastewater contaminant was investigated under visible light irradiation. The synthesized nanocomposite was systematically characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy/energy-dispersive X-ray (SEM/EDX) analysis. The decolorization results revealed that the Ti-M-S1 (with an anionic surfactant: sodium dodecyl sulfate) and Ti-M-S2 (with a non-ionic surfactant: Triton X-100) nanocomposites showed much more photocatalytic activity than the pure TiO2 did under visible light. MB and MO dye removal efficiencies of 82.4% and 77.8 %, respectively, were achieved by Ti-M-S1 (1%) within about 120 min and no further changes in the uptake were observed up to 24 h. This confirmed the suitability of the synthesized nanocomposite for use as a photocatalyst under visible light with the added advantage of increasing the versatility of potential applications for TiO2 photocatalysts.

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32

Thomas, Maciej, Krzysztof Barbusiński, Katarzyna Kalemba, Paweł Jan Piskorz, Violetta Kozik, and Andrzej Bąk. "Optimization of the Fenton Oxidation of Synthetic Textile Wastewater using Response Surface Methodology." Fibres and Textiles in Eastern Europe 25 (December 31, 2017): 108–13. http://dx.doi.org/10.5604/01.3001.0010.5380.

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This article presents the possibility of using the classical Fenton process (Fe(II)/H2O2) to purify synthetic textile wastewater (COD=1872 mg O2/dm3, TOC=660 mg/dm3) containing azo dye Anilan Blue GRL 250% (200 mg/dm3) and Sodium Lauryl Sulphate (SLS) as anionic surfactant at a concentration of 95 mg/dm3. Model studies were carried out using RSM, obtaining a good fit of approximated values to experimental values (R2=0.9461 and R2adj=0.7379). For optimal process parameters (pH 3, Fe(II) 0.85 g/dm3, H2O2 14.5 g/dm3), complete decolourisation (<10 mg Pt/dm3) was achieved as well as a reduction in COD, TOC and SLS concentrations to 83%, 44% and 98%, respectively.

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33

De Vijlder, Michel. "Influence of Solubilized Azo Dyes on the C.M.C. Value of Cetyl-Trimethylammonium Bromide." Zeitschrift für Physikalische Chemie 217, no. 6 (June 1, 2003): 653–66. http://dx.doi.org/10.1524/zpch.217.6.653.20450.

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AbstractThe spectral changes in the visible absorption range of the two anionic azo dyes Methyl an Ethyl Orange in neutral aqueous solution, induced by the presence of Cetyl-trimethylammonium bromide (CTAB) micelles, are attributed to the partial solubilization of the dyes rather than to the formation of mixed micelles. The same phenomenon is not observed with the larger Orange IV (C6H5NHC6H4N=NC6H4SO3−Na+). The c.m.c.CTAB values in the presence of dyes were obtained from spectrophotometric as well as from surface tension measurements. The reduction of the electrostatic forces within the micelles due to the presence of dye counterions initially provokes the expected progressive lowering of the c.m.c.CTAB values. In a higher dye concentration range, however, appears a systematical increase denoting a renewed strengthening of the interactions between dye and surfactant monomers that also prevail below the c.m.c. (Buwalda et al.). This assumption is supported by the observed corresponding decrease of the values for the association constant which characterize the interactions existing between the dye monomers and the surfactant micelles. At fixed dye concentrations, increasing amounts of a strong electrolyte (NaBr) lower the c.m.c.CTAB in accordance with the requirements of the Corrin-Harkins relation. Partition coefficient values have been estimated from the spectrophotometric data by using the relation proposed by Kawamura et al.. They depend on the nature and on the concentration of the solubilizate as well as on the ionic strength of the solution but their order of magnitude invariably evidences the importance of the solubilization process.

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34

ABE, Masahiko, Takashige KASUYA, and Keizo OGINO. "Interaction between an Anionic Surfactant and Some Oil Soluble Azo Dyes at Oil/Water Interface." Journal of Japan Oil Chemists' Society 35, no. 9 (1986): 762–67. http://dx.doi.org/10.5650/jos1956.35.762.

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35

Oakes, John, Peter Gratton, and Toby Gordon-Smith. "Combined kinetic and spectroscopic study of oxidation of azo dyes in surfactant solutions by hypochlorite." Dyes and Pigments 46, no. 3 (September 2000): 169–80. http://dx.doi.org/10.1016/s0143-7208(00)00051-6.

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36

El-Dougdoug, W. I. A. "Synthesis and Evaluation of Anionic Copolymeric Surfactant as Dispersing Agent for Some Heterocyclic Azo-Dyes." Journal of Dispersion Science and Technology 31, no. 10 (September 20, 2010): 1298–306. http://dx.doi.org/10.1080/01932691.2010.506848.

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37

Kinashi, Kenji, Isana Ozeki, Ikumi Nakanishi, Wataru Sakai, and Naoto Tsutsumi. "Holographic Performance of Azo-Carbazole Dye-Doped UP Resin Films Using a Dyeing Process." Materials 12, no. 6 (March 21, 2019): 945. http://dx.doi.org/10.3390/ma12060945.

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For the practical application of dynamic holography using updatable dyed materials, optical transparency and an enlarged sample size with a uniform dispersion of the dye and no air bubbles are crucial. The holographic films were prepared by applying a dyeing method comprising application, curing, dyeing, and washing to an unsaturated polyester (UP) resin film. The unsaturated polyester (UP) resin film with high optical transparency was dyed with a 3-[(4-cyanophenyl)azo]-9H-carbazole-9-ethanol (CACzE) (azo-carbazole) dye via the surfactant, polyoxyethylene (5) docosyl ether, in an aqueous solution. The amount of dye uptake obtained via the dyeing process ranged from 0.49 to 6.75 wt.%. The dye concentration in the UP resin was proportional to the dye concentration in the aqueous solution and the immersion time. The UP resin film with 3.65 wt.% dye exhibited the optical diffraction property η1 of 0.23% with a response time τ of 5.9 s and a decay time of 3.6 s. The spectroscopic evaluation of the UP resin film crosslinking reaction and the dyeing state in the UP resin film are discussed. Furthermore, as an example of its functionality, the dynamic holographic properties of the dye-doped UP resin film are discussed.

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38

Simončič, Barbara, and Franci Kovac. "A study of dye–surfactant interactions. Part 2. The effect of purity of a commercial cationic azo dye on dye–surfactant complex formation." Dyes and Pigments 40, no. 1 (January 1999): 1–9. http://dx.doi.org/10.1016/s0143-7208(98)00028-x.

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39

Saha, Anindita, and Prabhat Pandit. "Removal of Acid Yellow 36 and Rhodamine B from single and binary systems by reverse micelles." International Journal of ChemTech Research 13, no. 4 (2020): 383–93. http://dx.doi.org/10.20902/ijctr.2019.130407.

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In the present study reverse micelles are employed to encapsulate ionic dyes such as, azo dye Acid Yellow 36 (AY36) also known as Metanil Yellow and cationic dye Rhodamine B (RhB). This method proved to be highly efficient in the removal of high concentrations of dyes as much as 40mg/100ml from aqueous solutions of single and binary systems. The effect of different parameters like initial dye concentration, surfactant concentration, pH and salt (KCl) concentration on the percentage removal of the dyes were studied. It was observed that the percentage removal for both anionic and cationic dye decreased with the increase in the initial dye concentration and increased with the increase in the surfactant concentration in case of both the dyes in single and binary systems. Further, it was noticed that for anionic dye the percentage removal increased with the increase of both pH and KCl concentration while the results were exactly the reverse in case of RhB dye which exists in both cationic and zwitterionic forms at pH above 4. In binary systems, it was found that the removal of RhB increased compared to its removal from single system, while the removal of AY36 decreased in binary system

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40

Amin, Alaa S., and Gamal O. El-Sayed. "Colorimetric Microdetermination of Mercury(II) with Some Quinoxaline Azo Compounds in Presence of an Anionic Surfactant." Monatshefte fuer Chemie/Chemical Monthly 132, no. 5 (May 21, 2001): 587–96. http://dx.doi.org/10.1007/s007060170096.

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Gomes, Ana Carolina Ribeiro, Luciene Dias Fernandes Cafer, Paula Homem-de-Mello, Maurício Domingues Coutinho-Neto, and Ivanise Gaubeur. "The interaction of an azo compound with a surfactant and ion pair adsorption to solid phases." Journal of Colloid and Interface Science 367, no. 1 (February 2012): 370–77. http://dx.doi.org/10.1016/j.jcis.2011.10.032.

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42

Chaudhary, Savita, Aastha Sood, and S. K. Mehta. "Surfactant Anchoring and Aggregate Structure at Silica Nanoparticles: A Persuasive Facade for the Adsorption of Azo Dye." Journal of Nanoscience and Nanotechnology 14, no. 9 (September 1, 2014): 6824–34. http://dx.doi.org/10.1166/jnn.2014.9214.

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Abe, M., T. Kasuya, and K. Ogino. "Thermodynamics of surfactant-dye complex formation in aqueous solutions. Sodium alkyl sulfates and azo oil dye systems." Colloid & Polymer Science 266, no. 2 (February 1988): 156–63. http://dx.doi.org/10.1007/bf01452813.

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44

Gürkan, Ramazan, Halil İbrahim Ulusoy, and Mehmet Akçay. "Surfactant Enhanced-Spectrophotometric Determination of Uranium (VI) at Trace Levels by Using Eriochrome Black T as a Chelating Agent." Eclética Química Journal 36, no. 3 (October 31, 2017): 37. http://dx.doi.org/10.26850/1678-4618eqj.v36.3.2011.p37-46.

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A sensitive and relatively selective spectrophotometric method is proposed for the rapid determination of uranium using Eriochrome Black T (EBT) being a 2,2’-dihydroxy azo benzene derivative metal indicator in the presence of cationic surfactant of N-cetyl N,N,N-trimethylammonium bromide (CTAB). The complex formation reaction between EBT and uranyl ion, UO2 2+ is instantaneous in presence of NH3/NH4Cl buffer at pH 9.5 and the absorbance as analytical signal remains stable for over 6 h. CTAB as cationic surfactant and polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether, octyl phenol ethoxylate (Triton X-100) as nonionic surfactant are used for improving the sensitivity and solubility of the analytical system, respectively. The proposed method allows the determination of uranium in the concentration range of 0.025-2 μg mL–1 with a molar absorption coefficient of 92440.60 L mol–1 cm–1 and Sandell’s sensitivity of 2.92 μg cm2- in micellar medium while it allows the determination of uranium in the concentration range of 0.25-2.5 μg mL–1 with a molar absorption coefficient of 57019.44 L mol–1 cm–1 and Sandell’s sensitivity of 4.74 μg cm2- at 565 nm in water. The method has a detection limit of 4.60 μg L–1 (CDL: 3Sb/m) at an analytical measurement wavelength of 637 nm with a bathochromic shift of 72 nm. The selectivity of chelating reagent was improved by the use of a mixture containing ethylenediaminetetraacetic acid (EDTA), sulfosalycylic acid and NaF as masking agent. The proposed method has been successfully applied to the determination of uranium at trace levels in different environmental water samples such as tap-water, natural springwater and river-water. The precision (with coefficient of variation of 1.85%) and the accuracy obtained were highly satisfactory. In order to test the accuracy and validation of the method, the certified reference material (TMDA-70; fortified lake water sample) was also analyzed. It was found that the found and the certified values were in good agreement for validating the surfactant enhanced-spectrophotometric method.

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Ogino, K., H. Uchiyama, and M. Abe. "Fading phenomena of azo oil dye in anionic-nonionic surfactant solutions II. Effects of alkyl and/or oxyethylene groups in nonionic surfactant on the fading rate." Colloid & Polymer Science 265, no. 1 (January 1987): 52–57. http://dx.doi.org/10.1007/bf01422664.

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46

Yi, Shi Xiong, and Yong Chun Dong. "Adsorption Study of Reactive Dyes on Cotton Fabric in Non-Aqueous Systems." Advanced Materials Research 550-553 (July 2012): 671–75. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.671.

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Abstract: The non-ionic reverse micelles used for dyeing cotton fabric were prepared with a non-ionic surfactant Triton X-100 (TX-100) by injecting small amount of reactive dye aqueous solution. The effect of electrolyte on the adsorption capacity of reactive dyes onto cotton fabric in this system was studied. And the adsorption properties of three water-soluble anionic azo dyes including Reactive Blue 222, Reactive Red 195 and Reactive Yellow 145 onto cotton fabric in TX-100 reverse micelle were also studied and compared. The results indicated that reactive dyes showed a better adsorption property on cotton fabric in TX-100 reverse micelle without the addition of NaCl. The adsorption of the dyes onto cotton showed better agreement with Langmuir isotherm equation. Reactive Yellow 145 with lower negative charge and higher hydrophilicity exhibited the higher adsorption capacity than the other dyes. The adsorption process follows by the chemical adsorption.

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Kumar, Mukesh, Kiran Soni, Geeta Devi Yadav, Surendra Singh, and Sasanka Deka. "Surfactant directed Ag 1−x Ni x alloy nanoparticle catalysed synthesis of aromatic azo derivatives from aromatic amines." Applied Catalysis A: General 525 (September 2016): 50–58. http://dx.doi.org/10.1016/j.apcata.2016.06.039.

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HARADA, Hiroyuki, and Kazuhiko TANAKA. "The Effects of Nonionic Surfactant on Oxidation of Azo-Dye by Ozonation Combined with Vacuum Ultraviolet(VUV) Radiation." Journal of Environmental Conservation Engineering 29, no. 6 (2000): 455–60. http://dx.doi.org/10.5956/jriet.29.455.

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Oakes, John, and Peter Gratton. "Solubilisation of dyes by surfactant micelles. Part 1; Molecular interactions of azo dyes with nonionic and anionic surfactants." Coloration Technology 119, no. 2 (March 2003): 91–99. http://dx.doi.org/10.1111/j.1478-4408.2003.tb00156.x.

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Oakes, John, and Peter Gratton. "Solubilisation of dyes by surfactant micelles. Part 2; Molecular interactions of azo dyes with cationic and zwitterionic surfactants." Coloration Technology 119, no. 2 (March 2003): 100–107. http://dx.doi.org/10.1111/j.1478-4408.2003.tb00157.x.

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