摘要
The interaction between cucurbit[8]uril(Q[8])and oroxin B(ORB)was investigated by UV-visible(UV-Vis)spectroscopy,isothennal titration calorimetry(ITC),mass spectnim(MS)and nuclear magnetic resonance(NMR)spectroscopy.The results showed that ORB formed a 2:1 inclusion complex with Q[8]with a binding constant of 8.266×10^5L^2·mol^-2.ORB had good scavenging ability for 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate)(ABTS)tree radicals(IC50=5.74μmol/L)and the addition of Q[8]did not significantly affect the antioxidant activity of ORB(IC50=5.76μmol/L).A phase solubility experiment revealed a 1.86-fold increase in the solubility of ORB when c(Q[8])=100μmol/L.bi vitro dmg release experiments showed that the release rate for ORB@Q[8]complex was lower than that of ORB in artificial intestinal juice,and higher than that of ORB in artificial gastric juice.
