Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/92827
Type: Artigo de periódico
Title: Characterization, Phase Solubility And Molecular Modeling Of α-cyclodextrin/pyrimethamine Inclusion Complex
Author: Araujo M.V.G.d.
Macedo O.F.L.
Nascimento C.d.C.
Conegero L.S.
Barreto L.S.
Almeida L.E.
Costa Jr. N.B.d.
Gimenez I.F.
Abstract: An inclusion complex between the dihydrofolate reductase inhibitor pyrimethamine (PYR) and α-cyclodextrin (α-CD) was prepared and characterized. From the phase-solubility diagram, a linear increase of PYR solubility was verified as a function of α-CD concentration, suggesting the formation of a soluble complex. A 1:1 host-guest stoichiometry can be proposed according to the Job's plot, obtained from the difference of PYR fluorescence intensity in the presence and absence of α-CD. Differential scanning calorimetry (DSC) measurements provided additional evidences of complexation such as the absence of the endothermic peak assigned to the melting of the drug. The inclusion mode characterized by two-dimensional 1H NMR spectroscopy (ROESY) involves penetration of the p-chlorophenyl ring into the α-CD cavity, in agreement to the orientation optimized by molecular modeling methods. © 2008 Elsevier B.V. All rights reserved.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/j.saa.2008.09.011
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-58049211819&partnerID=40&md5=c48a5c3af05484dd6590b17a0f44bb9c
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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