title: Thermodynamic and spectroscopic investigation of interactions between reactive red 223 and reactive orange 122 anionic dyes and cetyltrimethyl ammonium bromide (CTAB) cationic surfactant in aqueous solution.
abstract: The present study describes the conductometric and spectroscopic study of the interaction of reactive anionic dyes, namely, reactive red 223 and reactive orange 122 with the cationic surfactant cetyltrimethyl ammonium bromide (CTAB). In a systematic investigation, the electrical conductivity data was used to calculate various thermodynamic parameters such as free energy (ΔG), enthalpy (ΔH), and the entropy (ΔS) of solubilization. The trend of change in these thermodynamic quantities indicates toward the entropy driven solubilization process. Moreover, the results from spectroscopic data reveal high degree of solubilization, with strong interactions observed in the cases of both dyes and the CTAB. The spontaneous nature of solubilization and binding was evident from the observed negative values of free energies (ΔG p and ΔG b).
authors.affiliation: Department of Chemistry, Government College University, Faisalabad 38000, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Irfan
authors.affiliation: Department of Chemistry, Government College University, Faisalabad 38000, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Usman
authors.affiliation: Department of Chemistry, Government College University, Faisalabad 38000, Pakistan.
authors.forename: Asim
authors.initials: A
authors.lastname: Mansha
authors.affiliation: Department of Chemistry, Government College University, Faisalabad 38000, Pakistan.
authors.forename: Nasir
authors.initials: N
authors.lastname: Rasool
authors.affiliation: Department of Environmental Sciences, Government College University, Faisalabad 38000, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Ibrahim
authors.affiliation: Deanship of Scientific Research, College of Engineering, King Saud University P.O. Box 800, Riyadh 11421, Saudi Arabia.
authors.forename: Usman Ali
authors.initials: UA
authors.lastname: Rana
authors.affiliation: Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Siddiq
authors.affiliation: The Patent Office, Karachi 74400, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Zia-Ul-Haq
authors.affiliation: Department of Crop Science, Faculty of Agriculture, UPM, 43400 Serdang, Selangor, Malaysia.
authors.forename: Hawa Z E
authors.initials: HZ
authors.lastname: Jaafar
authors.affiliation: Deanship of Scientific Research, College of Engineering, King Saud University P.O. Box 800, Riyadh 11421, Saudi Arabia.
authors.forename: Salah Ud-Din
authors.initials: SU
authors.lastname: Khan
mesh_terms: D001391:Azo Compounds / Q000032:analysis* / Q000378:metabolism; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000032:analysis* / Q000378:metabolism; D004396:Coloring Agents / Q000032:analysis* / Q000378:metabolism; D012996:Solutions / Q000032:analysis / Q000378:metabolism; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013057:Spectrum Analysis / Q000379:methods*; D013463:Sulfuric Acid Esters / Q000032:analysis* / Q000378:metabolism; D013501:Surface-Active Agents / Q000032:analysis* / Q000378:metabolism; D013816:Thermodynamics; D014867:Water / Q000032:analysis / Q000378:metabolism
chemical_list: D001391:Azo Compounds; D002593:Cetrimonium Compounds; D004396:Coloring Agents; D012996:Solutions; D013463:Sulfuric Acid Esters; D013501:Surface-Active Agents; D014867:Water; C109260:reactive orange; D000077286:Cetrimonium