Determination of the inclusion complex constant between oleuropein and cyclodextrins by complexation theory
作者: Carlos Eduardo BarãoFátima Paiva-MartinsGisella Maria ZaninFlavio Faria Moraes
作者单位: 1Departamento de Engenharia Química, Universidade Estadual de Maringá
2Instituto Federal do Paraná
3Departamento de Química, Universidade do Porto
刊名: Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2014, Vol.78 (1-4), pp.465-470
来源数据库: Springer Journal
DOI: 10.1007/s10847-013-0318-x
关键词: OleuropeinCyclodextrinInclusionComplex
英文摘要: Abstract(#br)Oleuropein (OLE) is a major phenolic compound of olive leaf (Olea europaea) and has many therapeutic properties associated with olive leaf extracts. This work concerns the determination of the inclusion complex constant between OLE and cyclodextrins (CDs), based on the competition of two guests for the CD cavity, one being a dye and the other OLE. The dye used was methylorange (MO) and pH 3 was selected, since MO molar absorptivity at 500 nm is at maximum in this condition. A solution of MO, OLE, and α-CD or β-CD, with citrate buffer was used for determining the absorbance values. From these data and by appropriate mathematical modeling, the equilibrium constant for the formation of OLE:CD complexes were obtained: for OLE:α-CD K = 1,352.4 L mol −1 ( R 2 = 0.9975) and for...
全文获取路径: Springer  (合作)
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关键词翻译
关键词翻译
  • oleuropein 橄榄中的苦涩物质
  • cyclodextrins 环糊精
  • complexation 络合作用
  • constant 常数
  • inclusion 包体
  • between 在中间
  • theory 理论