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http://dx.doi.org/10.14478/ace.2013.1084

Thermodynamic Study on the Solubilization of p-Halogenated Phenol Derivatives in TTAB Solution  

Lee, Byung-Hwan (Department of Applied Chemical Engineering, Korea University of Technology & Education)
Publication Information
Applied Chemistry for Engineering / v.25, no.1, 2014 , pp. 20-26 More about this Journal
Abstract
The interaction of p-halogenated phenol derivatives with the micellar system of tetradecyltrimethylammonium bromide (TTAB) was studied by the UV/Vis spectrophotometric method. Effects of substituents, additives, and temperatures on the solubilization of phenol derivatives have been measured. The results show that all the values of ${\Delta}G^o$ and ${\Delta}H^o$ were negative and the values of ${\Delta}S^o$ were positive for all phenol derivatives within the measured temperature range. The calculated thermodynamic parameters depended on the size, the electro-negativity, and the hydrophobic property of halogen substituents. The addition of n-butanol results in the decrement in tthe Ks values and the addition of NaCl caused the increment in the Ks values for all the phenol derivatives. From these changes we can postulate that the solubilization sites of the phenol derivatives in the micelle depend severely on properties of the halogen-substituent.
Keywords
micelle; solubilization constant; p-halogenated phenol; palisade region; isostructural temperature;
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Times Cited By KSCI : 4  (Citation Analysis)
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