| Thermodynamic parameters for the molecular inclusion reaction of dulcin with beta-cyclodextrin. spectrofluorimetric determination of dulcin. | |
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MedLine Citation:
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PMID: 18965957 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The inclusion of dulcin in alpha- and beta-cyclodextrin has been studied by fluorescence spectroscopy. To quantitatively describe complex formation between the beta-cyclodextrin and dulcin, an association constant of 290 M(-1) at 21 degrees was obtained. The thermodynamics associated with the complex formation between dulcin and beta-cyclodextrin in aqueous solution has been studied. The obtained value of DeltaG(0) = -13.7 kJ/mole at 21 degrees , together with DeltaH(0) = -33.6 +/- 2.3 kJ/mole and DeltaS(0) = -67.2 +/-8.3 Jmole(-1) K(-1) indicate that dulcin has a very marked tendency to associate with beta-cyclodextrin in water. The inclusion complex of dulcin in beta-cyclodextrin has been used to determine dulein in the range 0.13-5 mug/ml the method has been applied to determine dulcin in soft drinks. |
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Authors:
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A N Díaz; L S Feria; F G Sánchez |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Talanta Volume: 41 ISSN: 0039-9140 ISO Abbreviation: Talanta Publication Date: 1994 Apr |
Date Detail:
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Created Date: 2008-10-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2984816R Medline TA: Talanta Country: England |
Other Details:
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Languages: eng Pagination: 509-14 Citation Subset: - |
Affiliation:
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Departamento de Química Analítica, Facultad de Ciencias, Universidad de Málaga, 29071-Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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