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Preparation and characterization of inclusion complexes of β-cyclodextrin−BITC and β-cyclodextrin−PEITC / Hai-Na Yuan in Industrial & engineering chemistry research, Vol. 48 N° 10 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 5070–5078 Titre : Preparation and characterization of inclusion complexes of β-cyclodextrin−BITC and β-cyclodextrin−PEITC Type de document : texte imprimé Auteurs : Hai-Na Yuan, Auteur ; Shan-Jing Yao, Auteur ; Lian-Qing Shen, Auteur Année de publication : 2009 Article en page(s) : pp. 5070–5078 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Benzyl  isothiocyanate  Phenylethyl  isothiocyanate  Inclusion  complexes  Response  surface  design Résumé : Benzyl isothiocyanate (BITC) and phenylethyl isothiocyanate (PEITC) are two poorly water-soluble plant components that can form inclusion complexes with β-cyclodextrin (β-CD), namely, β-cyclodextrin−BITC and β-cyclodextrin−PEITC, that are two water-soluble complexes. The inclusion complexes were prepared by two independent processes: physical mixing and coprecipitation. The content of guest molecules in the complexes was measured by UV spectrophotometry. Response surface design (RSD) was applied to optimize the preparation conditions of said complexes. The results showed that the embedding ratios for β-CD−BITC and β-CD−PEITC were 94.9% and 94.1%, respectively. Variance analysis revealed that the mass ratio and the inclusion temperature were two important factors in terms of inclusion action. The optimum conditions for the inclusion of β-CD−BITC were a mass ratio of 0.17 and an inclusion temperature of 57.99 °C, and those for β-CD−PEITC were a mass ratio of 0.0057 and an inclusion temperature of 64.87 °C. The inclusion complexes prepared were qualified by thermal methods [thermogravimetry (TG) and differential scanning calorimetry (DSC)], Fourier transform infrared (FTIR) spectroscopy, and X-ray powder diffraction (XRD). The thermal analysis of β-CD and the two complexes indicated that an interaction between the guest and host molecules did occur. BITC and PEITC could be partially embedded in the hydrophobic cavity of β-CD, so the formation of the said complexes was established. The X-ray and FTIR results support this indication of inclusion behavior. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8015329 [article] Preparation and characterization of inclusion complexes of β-cyclodextrin−BITC and β-cyclodextrin−PEITC [texte imprimé] / Hai-Na Yuan, Auteur ; Shan-Jing Yao, Auteur ; Lian-Qing Shen, Auteur . - 2009 . - pp. 5070–5078. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 5070–5078 Mots-clés : Benzyl  isothiocyanate  Phenylethyl  isothiocyanate  Inclusion  complexes  Response  surface  design Résumé : Benzyl isothiocyanate (BITC) and phenylethyl isothiocyanate (PEITC) are two poorly water-soluble plant components that can form inclusion complexes with β-cyclodextrin (β-CD), namely, β-cyclodextrin−BITC and β-cyclodextrin−PEITC, that are two water-soluble complexes. The inclusion complexes were prepared by two independent processes: physical mixing and coprecipitation. The content of guest molecules in the complexes was measured by UV spectrophotometry. Response surface design (RSD) was applied to optimize the preparation conditions of said complexes. The results showed that the embedding ratios for β-CD−BITC and β-CD−PEITC were 94.9% and 94.1%, respectively. Variance analysis revealed that the mass ratio and the inclusion temperature were two important factors in terms of inclusion action. The optimum conditions for the inclusion of β-CD−BITC were a mass ratio of 0.17 and an inclusion temperature of 57.99 °C, and those for β-CD−PEITC were a mass ratio of 0.0057 and an inclusion temperature of 64.87 °C. The inclusion complexes prepared were qualified by thermal methods [thermogravimetry (TG) and differential scanning calorimetry (DSC)], Fourier transform infrared (FTIR) spectroscopy, and X-ray powder diffraction (XRD). The thermal analysis of β-CD and the two complexes indicated that an interaction between the guest and host molecules did occur. BITC and PEITC could be partially embedded in the hydrophobic cavity of β-CD, so the formation of the said complexes was established. The X-ray and FTIR results support this indication of inclusion behavior. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8015329