摘要
研究β-环糊精在溶液中对连翘酯苷的包合作用。采用等摩尔系列法考察了主客分子的包合摩尔比,通过荧光光谱研究连翘酯苷/β-CD在不同条件下的包合作用。在不同pH值、不同温度、不同离子强度等条件下计算包合表观稳定常数,包合过程的热力学参数为:ΔH=-22.92kJ/mol,ΔS=-22.70J/mol,且不同温度条件下的ΔG均小于零。结论:β-CD与连翘酯苷形成摩尔比为1∶1的包合物,包合过程为放热过程,而且是自发进行。
To investigate the complexation of forsythiaside with β-CD in solution.Inclusion stoichiometry of β-cyclodextrin/forsythiaside in aqueous medium had been studied using equimolar various method.The inclusion complexes of β-cyclodextrin with forsythiaside were studied by fluorescence spectroscopy.The experiment was preformed by Benesi-Hildebrand methods.Results:The apparent stability constant at different pH values,temperatures and ion strengths was calculated respectively.Thermodynamic parameters during the ...
出处
《食品工程》
2009年第1期47-49,60,共4页
Food Engineering
基金
科技部科技支撑计划项目(2006BAI06A20-10)
太原市科技明星计划项目(070204021)
关键词
连翘酯苷
Β-CD包合物
包合物
包合比
热力学
forsythiaside
β-cyclodextrin
inclusion complex
thermo dynamic parameters
