高等学校化学研究 ›› 2017, Vol. 33 ›› Issue (5): 736-741.doi: 10.1007/s40242-017-7096-8
XU Zhiling1,2, LIAN Xiaowei1,2, LI Mengjie2, ZHANG Xiaodong2, WANG Yi2, TAO Zhu2, ZHANG Qianjun2
XU Zhiling1,2, LIAN Xiaowei1,2, LI Mengjie2, ZHANG Xiaodong2, WANG Yi2, TAO Zhu2, ZHANG Qianjun2
摘要:
The host-guest interaction between cucurbit[8]uril(Q[8]) and chrysin(CHR) has been studied by means of 1H NMR, mass spectrometry(MS), differential thermal analysis(DTA), and UV-Vis spectrophotometry. The results show that CHR forms a 1:1 inclusion complex with Q[8], with a binding constant of CHR with Q[8] by UV absorption being 5.4×106. Phase solubility experiments show a 5.13-fold increase in the solubility of CHR through interaction with Q[8]{c(Q[8])=10-4 mol/L}. A study of the evolution of UV absorption spectra with time shows that Q[8]significantly increases the stability of CHR. The antioxidant activity of CHR-Q[8] has been tested by the ABTS method. The CHR-Q[8] inclusion complex shows a better scavenging effect towards the ABTS radical than CHR, with respective IC50 values of 1.05×10-6 and 3.07×10-6 mol/L. In vitro release studies have shown that CHR-Q[8] has a sustained release effect.