Influence of potassium chloride on diffusion of 2-hydroxypropyl-¦Â cyclodextrin and ¦Â-cyclodextrin at T = 298.15 K and T = 310.15 K

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• 作者：Cecilia I.A.V. Santos^a ; ^{cecilia.alves@uah.es} ; Ana C.F. Ribeiro^b ; ^{anacfrib@ci.uc.pt} ; Lu&iacute ; s M.P. Ver&iacute ; ssimo^b ; Victor M.M. Lobo^b ; ^{vlobo@ci.uc.pt} ; Miguel A. Esteso^a ; ^{miguel.esteso@uah.es}
• 关键词：Association constant ; Cyclodextrins ; Diffusion coefficient ; Solutions ; Transport properties
• 刊名：Journal of Chemical Thermodynamics
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：57
• 期：Complete
• 页码：220-223
• 全文大小：178 K

文摘

Ternary mutual diffusion coefficients measured by the Taylor dispersion method (D₁₁, D₂₂, D₁₂ and D₂₁) are reported for two aqueous systems, that is, potassium chloride and 2-hydroxypropyl-¦Â-cyclodextrin (HP-¦ÂCD), and potassium chloride and ¦Â-cyclodextrin (¦ÂCD) at T = 298.15 K and T = 310.15 K, and at carrier concentrations from (0.000 to 0.010) mol¡¤dm^?3 for each solute. Based on these data, some conclusions about the influence of KCl on the diffusion of the cyclodextrins (HP-¦ÂCD and ¦ÂCD) were made, and the association constants of the complexes formed between the two components for each system (KCl and ¦ÂCD, and KCl and HP-¦ÂCD) were estimated.