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Spectrophotometric and Thermodynamic Studies of the Inclusion Complexation of Thiourea Substrate with Hydroxypropyl-β-cyclodextrin

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1TitleTitle of DocumentSpectrophotometric and Thermodynamic Studies of the Inclusion Complexation of Thiourea Substrate with Hydroxypropyl-β-cyclodextrin
2CreatorAuthor's name, affiliation, country INAS EL HASSAN, AHMAD ALLOUCH, ADIB ABOU DALLE, HANNA El-NAKAT and FAWAZ EL OMAR
Laboratory of Applied Chemistry (LAC), Faculty of Science III, Lebanese University,
P.O. Box 826, Tripoli, Lebanon
Department of Chemistry, Faculty of Science, University of Balamand, P.O. Box 100, Tripoli, Lebanon
3SubjectDicipline(s) Chemical Science
3SubjectKeywords Thiourea, Inclusion complex, Cyclodextrin, Association constant
4DescriptionAbstract 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 (ΔG) and the enthalpy of formation (ΔH) as well as the entropy (ΔS) 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%.
5PublishersOrganizing agency, location WWW Publications, India
6Contributor Sponsor(s) -
7DateDate (YYYY-MM-DD) -
8TypeStatus & genre Peer-reviewed Article
8TypeType
9FormateFile Formate PDF
10IdentifierUniform Resource Identifier Click Here
10IdentifierDigital Object Identifier DOI:10.7598/cst2013.560
11SourceJournal/conference title; vol., no. (Year)Chemical Science Transactions, Volume  2 , Number  (4), (2013)
12LanuguageEnglish=en en
13RelationSupp.files
14Coverage -
15CopyrightCopyright and permissions
Chemical Science Transactions | Chem Sci Trans | CST | Online Chemistry Journal | Open Access
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