摘要
本文用紫外-可见分光光度法测定了亚甲基蓝／β-环糊精包合物的包合平衡常数（简称包合常数K）。并探讨了包合物溶液放置时间、亚甲基蓝初始浓度、溶液pH值对包合常数的影响。结果表明：亚甲基蓝／β-环糊精包合物的包结比为1：1，溶液放置时间和亚甲基蓝初始浓度不影响亚甲基蓝／β-环糊精的包合常数，溶液pH对包合常数有较大的影响，pH=3～10时包合常数随pH值的增加而增加，包合常数在pH=7时为1×10^4L／mol。
The formation constants of β-Cycledextrins（β-CD） inclusion complex with methylene blue（MB） were determined by UV - vis spectral analysis. The effects of some factors,such as placing time of MB/β - CD solution,initial concentration of α/β,and pH value of Mb/β -CD solution,on the inclusion equilibrium constant（K） were studied. The experiment results showed that the mole ratio of inclusion complex of β-CD with MB is 1：1. K was unchanged with the change of MB/β-CD solution placing time and MB initial concentration and was variational with change ofpH of MB/β-CD solution. K increased at pH values of 3. 0 - 10. 0. K is 1 × 10^4 L/mol at pH =7.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2006年第8期917-920,共4页
Chemical Research and Application
基金
湖北省自然科学基金(2003ABA090)项目资助
