Document Detail


Thermodynamic parameters for the molecular inclusion reaction of dulcin with beta-cyclodextrin. spectrofluorimetric determination of dulcin.
MedLine Citation:
PMID:  18965957     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
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.
Authors:
A N Díaz; L S Feria; F G Sánchez
Related Documents :
19932637 - Spectral study on the inclusion complex of cryptophane-e and chcl3.
19049277 - Discrete magnetic patterns of nonionic and ionic clathrate hydrates.
18602547 - Enantiomeric discrimination of 1,1'-binaphthol by room temperature phosphorimetry using...
17428087 - On the characterization of host-guest complexes: surface tension, calorimetry, and mole...
11605657 - Five new peltogynoids from underground parts of iris bungei: a mongolian medicinal plant.
22338657 - The superstructure determination of displacive distortions via symmetry-mode analysis.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Talanta     Volume:  41     ISSN:  0039-9140     ISO Abbreviation:  Talanta     Publication Date:  1994 Apr 
Date Detail:
Created Date:  2008-10-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  509-14     Citation Subset:  -    
Affiliation:
Departamento de Química Analítica, Facultad de Ciencias, Universidad de Málaga, 29071-Spain.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Preparation of Amberlite XAD resins coated with dithiosemicarbazone compounds and preconcentration o...
Next Document:  Determination of cadmium and lead in the low ng/l range by stripping potentiometry employing medium ...