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

TTAB 수용액에서 p-할로겐화 페놀유도체들의 가용화에 대한 열역학적 연구

  • Lee, Byung-Hwan (Department of Applied Chemical Engineering, Korea University of Technology & Education)
  • 이병환 (한국기술교육대학교 응용화학공학과)
  • Received : 2013.07.17
  • Accepted : 2013.10.11
  • Published : 2014.02.10

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

Acknowledgement

Supported by : 한국기술교육대학교

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  1. Effects of NaCl and n-Butanol on the Solubilization of 4-Halogenated Phenols in Aqueous Solution of TTAB vol.58, pp.6, 2014, https://doi.org/10.5012/jkcs.2014.58.6.517