Int J Chem Kinet 40 294–300, 2008.pdfVIP

Study of Association Thermodynamics between Crystal Violet and Sodium Bis(2-Ethylhexyl)- Sulfosuccinate and Kinetics of Basic Fading of Crystal Violet in Microemulsions ZHI YUN CHEN,1 JI HUA ZHAO,2 WEI HE,2 XUE QIN AN,2,3 WEI GUO SHEN1,2 1School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China 2College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China 3College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 210097, People’s Republic of China Received 14 September 2007; revised 30 November 2007; accepted 1 January 2008 DOI 10.1002/kin.20317 Published online in Wiley InterScience (). ABSTRACT: The thermodynamics of the association between 4,4′,4′′-tris(dimethyl- amino)triphenylmethyl chloride (crystal violet or CV) and sodium bis(2-ethylhexyl)- sulfosuccinate (aerosol OT or AOT) in water/AOT/n-decane microemulsion and the kinetics of the basic hydrolysis of CV in a water-in-oil microemulsion were investigated by UV–vis spectroscopic measurements. An association model of CV and AOT was used to analyze the experimental data to obtain the association constants at various temperatures. By taking the association into account, the “actual” rate constants and the activation energies of the basic hydrolysis of CV in the media of water/AOT/oil were obtained. The difference in thermodynam- ics and kinetics between the two media of water/AOT/n-decane and water/AOT/isooctane is discussed. C? 2008 Wiley Periodicals, Inc. Int J Chem Kinet 40: 294–300, 2008 Correspondence to: Wei Guo Shen; e-mail: shenwg@. Contract grant sponsor: National Natural Science Foundation of China. Contract grant numbers: and Contract grant sponsor: Chinese Ministry of Education. Contract grant number: 105074. Contract grant sponsor: Science and Technology Commission of Shanghai Municipality. Contract grant n