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|Title:||Spectroscopic and thermodynamic studies of the inclusion complexation of thiourea substrate with hydroxypropyl- β -cyclodextrin||Authors:||Hassan, Inas EL
Abou Dalle, Adib
Nakat, Hanna El
Omar, Fawaz El
|Affiliations:||Department of Chemistry||Keywords:||Thiourea
|Issue Date:||2013||Part of:||Chemical science transactions journal||Volume:||2||Issue:||4||Start page:||1475||End page:||1481||Abstract:||
A simple and fast spectrophotometric method has been used to determine the thermodynamic parameters of the inclusion complex formed between N-(2-ethylphenyl)-N'-(2- methylphenyl) thiourea, a hydrophobic substrate trap and hydroxypropyl-β-cyclodextrin (HP−β−CD). The overall association constants have been calculated at different temperatures using the Scott's method and are found to decrease with increase in temperature. The free energy change (∆G°) and the enthalpy of formation (∆H°) as well as the entropy (∆S°) have been determined for the various inclusions. The method has been applied with satisfactory precision; the values of relative standard deviations did not exceed 2%.
|URI:||https://scholarhub.balamand.edu.lb/handle/uob/2562||Open URL:||Link to full text||Type:||Journal Article|
|Appears in Collections:||Department of Chemistry|
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