Complexation of γ-Cyclodextrin with Bromocresol Green

Chem. J. Chinese Universities

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Complexation of γ-Cyclodextrin with Bromocresol Green

LIU Hong¹, GU Zheng-Biao^1,2*, HONG Yan¹, LI Zhao-Feng^1,2

1. School of Food Science and Technology,
2. The State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China

Received:2008-01-10 Revised:1900-01-01 Online:2008-09-10 Published:2008-09-10
Contact: GU Zheng-Biao

Abstract

Abstract: UV-Vis and continuous variation plot method were used to study the complexation of γ-cyclodextrin with bromocresol green, and the stoichiometric ratio of the complexation was to be 1∶2. Thermodynamic analysis results show an inverse relationship between temperature and complexation constant, and the change of enthalpy, entropy and free energy of the complexation were -39.988 kJ/mol, 86.400 J/(K·mol) and -14.245 kJ/mol, respectively, which indicating that hydrophobic effect was the main force to form the complexes. γ-Cyclodextrin and bromocresol green complexes were examined by nuclear magnetic resonance, infrared spectrum and molecular modeling analysis, and was may be the group included in γ-cyclodextrin.

Key words: γ-Cyclodextrin, Bromocresol green, Complexation

CLC Number:

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LIU Hong¹, GU Zheng-Biao^1,2*, HONG Yan¹, LI Zhao-Feng^1,2. Complexation of γ-Cyclodextrin with Bromocresol Green[J]. Chem. J. Chinese Universities, doi: .

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Complexation of γ-Cyclodextrin with Bromocresol Green

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