Host-guest interaction of cucurbit[8]uril with oroxin A and its effect on the properties of oroxin A.

ABSTRACT: In this study, we investigated the host-guest interactions between oroxin A (OA) and cucurbit[8]uril (Q[8]) using ¹H NMR, MS, UV-vis and IR spectroscopy. The results showed that OA and Q[8] formed an inclusion compound (OA@Q[8]) with a molar ratio of 1:1 and a binding constant of 1.299 × 10⁷ L·mol^-1. In addition, the effect of Q[8] on the properties of OA was investigated through comparative experiments. The solubility of OA in water increased 22.47-fold when the concentration of Q[8] was 1 × 10^-4 mol·L^-1. Q[8] hardly affected the antioxidant capacity of OA, while the cumulative release of OA in gastric juice increased 2.3-fold after forming the inclusion compound with Q[8].

SUBMITTER: Zeng Z 

PROVIDER: S-EPMC7522457 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature