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Al-Azhar Bulletin of Science
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Volume Volume 32 (2021)
Volume Volume 31 (2020)
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Gomaa, A. (2020). Study Interionic Attraction of anionic dyes by Electrolytic Conductivity Measurement. Al-Azhar Bulletin of Science, 31(Issue 2-A), 1-8. doi: 10.21608/absb.2020.37478.1076
Alshimaa Gomaa. "Study Interionic Attraction of anionic dyes by Electrolytic Conductivity Measurement". Al-Azhar Bulletin of Science, 31, Issue 2-A, 2020, 1-8. doi: 10.21608/absb.2020.37478.1076
Gomaa, A. (2020). 'Study Interionic Attraction of anionic dyes by Electrolytic Conductivity Measurement', Al-Azhar Bulletin of Science, 31(Issue 2-A), pp. 1-8. doi: 10.21608/absb.2020.37478.1076
Gomaa, A. Study Interionic Attraction of anionic dyes by Electrolytic Conductivity Measurement. Al-Azhar Bulletin of Science, 2020; 31(Issue 2-A): 1-8. doi: 10.21608/absb.2020.37478.1076

Study Interionic Attraction of anionic dyes by Electrolytic Conductivity Measurement

Article 1, Volume 31, Issue 2-A, December 2020, Page 1-8  XML PDF (513.1 K)
Document Type: Original Article
DOI: 10.21608/absb.2020.37478.1076
Author
Alshimaa Gomaa email
Department of Chemistry, Faculty of Science (Girls), Al-Azhar University, P.O. Box: 11754, Nasr City, Cairo, Egypt
Abstract
Measurements of conductivity in aqueous solution are recommended for studying the behavior of some dyes. The conductivity of two azo dyes C.I. Acid Red 151 (AR 151) and C.I. Mordant green 17 (MG17) have been studied. The ionization degree, α and Van,t Hoff’s factor ,i, were calculated; their values decrease with increasing dye concentration and increase with increasing temperature. The mobility, µ, the activation energy, E, were also calculated. The findings indicate that interionic attractions and connections are present. Dyes ions tend to self-associate. Since these textile dyes were applied from aqueous systems, it is important to understand the association of dyes. The molecular aggregation of two sulphonated dyes studied by measuring the electrolytic conductivity in aqueous solutions as a function of dye concentration and temperature. Aggregation number, aggregation constant and shape of aggregate were calculated. As expected the aggregation number decreases with increasing temperature, and that tends to J-aggregation which enhance the devices performance such as xerography, sensors in presence of different additives.
Keywords
Electrolytic conductivity; Association; Acid dyes; Mordant dyes
Main Subjects
Chemistry
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