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Title: Host - guest complex of β -cyclodextrin and dimethyl yellow in aqueous system - A spectrophotometric study on solubilization of dimethyl yellow in dilute aqueous solution of β -cyclodextrin
Authors: Sun, Dezhi
Chen, Jian
Lu, Weimin
Zheng, Xiaoming
Issue Date: Jan-1999
Publisher: NISCAIR-CSIR, India
Abstract: Solubilization of dimethyl yellow (DMY) in dilute β -cyclodextrin (β-CD ) aqueous solution (the concentration range is from 0 to 9 × 10-3 M) have been determined by spectrophotometry at 293.2, 298.2, 303.2, 308.2 and 313.2 K respectively. The results show that DMY and β -CD form host-guest complex of 1:1 stoichiometry. The equilibrium constants (Kco) of the complexing process at the five temperatures are calculated and the thermodynamic parameters (∆Go, ∆Ho and TSo) are estimated based on the values of the equilibrium constants. The data indicate that the complexing process is an enthalpy drive one.
Page(s): 73-76
Appears in Collections:IJC-A Vol.38A(01) [January 1999]

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