期刊
MOLECULES
卷 25, 期 16, 页码 -出版社
MDPI
DOI: 10.3390/molecules25163702
关键词
cis-cinnamic acid; cucurbituril; photoisomerization; responsiveness; light stimuli
资金
- United Arab Emirates University from the UAE University [31S392, 31S401]
Cis- orZ-configuration is required for the plant growth-promoting activity of cinnamic acid (CA), whereas theE-form is inactive. Herein, we describe the encapsulation ofE-CA by cucurbit[7]uril (CB7) and show that photoisomerization reactions can be more efficiently controlled in aqueous solutions by utilizing this supramolecular approach. Measurements of UV-visible absorption and proton NMR spectra at different pH values confirm thatE-CA and its methyl ester, methyl-E-cinnamate (MC), form stronger 1:1 host-guest complexes with CB7 compared to cucurbit[8]uril (CB8) or three cyclodextrins (alpha-, beta-, and gamma-CD). Irradiation of (300 nm) UV light to an aqueous solution of the CB7-boundEisomers inducesEtoZphotoisomerization and the dissociation of the complex. When the same solution is irradiated by (254 nm) UV light,ZtoEconformational changes of the unboundZisomers are observed and are accompanied by restoring the host-guest complex formation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据