食品科学 ›› 2009, Vol. 30 ›› Issue (23): 96-100.doi: 10.7506/spkx1002-6300-200923020

• 基础研究 • 上一篇    下一篇

柠檬草精油与β- 环糊精及其衍生物包结行为的研究

杨 欣,姜子涛*,李 荣   

  1. 天津商业大学生物技术与食品科学学院,天津市食品生物技术重点实验室
  • 收稿日期:2009-01-13 修回日期:2009-04-18 出版日期:2009-12-01 发布日期:2010-12-29
  • 通讯作者: 姜子涛 E-mail:ztjiang@yahoo.com
  • 基金资助:

    天津市自然科学基金项目(043604511)

Inclusion Reactions of β-Cyclodextrin and Its Derivatives with Cymbopogon citratus Volatile Oil

YANG Xin,JIANG Zi-tao*,LI Rong   

  1. College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin Key Laboratory of Food Biotechnology, Tianjin
    300134, China
  • Received:2009-01-13 Revised:2009-04-18 Online:2009-12-01 Published:2010-12-29
  • Contact: JIANG Zi-tao E-mail:ztjiang@yahoo.com

摘要:

利用紫外光谱法测定了β-环糊精及其衍生物(β-CDs)与柠檬草精油及其主要成分柠檬醛的包结比和包结常数,测定包结过程在20~50℃范围内的热力学参数ΔG、ΔH 和ΔS。实验表明,β-CDs 与柠檬草挥发油的包结比均为1:1,包结能力顺序为HP-β-CD>MD-β-CD>β-CD。从热力学角度探讨了影响包合过程的因素,包结反应是一个放热过程,包结过程的热力学参数ΔG、ΔS 和ΔH 均为负值,由此说明包结过程是自发进行的放热过程,包结的驱动力主要来自范德华力与疏水作用的相互作用。

关键词: 柠檬草精油, 环糊精, 紫外光谱, 包结常数, 热力学

Abstract:

The association constant and inclusion proportion for the inclusion complex of volatile oil of Cymbopogon citratus (VOC) with cyclodextrins (β-CD, DM-β-CD, and HP-β-CD) were determined in the range of 20 - 50 ℃ by ultraviolet spectrometry. The effect of temperature on K value and other parameters ΔG, ΔH and ΔS had also been discussed. Good linear relationships indicated that the structures of the inclusion complex were 1:1. The association constant (Ka) of the complexes had been obtained, and the order that the capability associated with VOC was HP- β-CD >DM- β-CD >β-CD. The inclusive process was an exthermic and enthalpy-driven process accompanied with a negative entropic contribution, and the reciprocity of hydrophobic interaction and van der Waals force plays an importance role in the process.

Key words: Cymbopogon citratus volatile oil, β-cyclodextrin derivatives, ultraviolet spectrometry, association constants, thermodynamics

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