Adaptive Se-Te Metathesis Controlled by Cucurbituril-Based Host-Guest Interaction

Cheng Liu, Zhiheng Zhang, Zhiyuan Fan, Chaowei He, Yizheng Tan, Huaping Xu

Chem. Asian J.2020, 15, 4321-4326.

Regulating the reactivity and equilibrium of dynamic reaction is essential for adaptive chemistry and functional materials. Herein, cucurbituril-based host-guest interaction was embedded into the dynamic metathesis between diselenide and ditelluride to establish an equilibrium-adaptive system. In this system, cucurbit[6]uril (CB[6]) selectively bound with diselenide while cucurbit[7]uril (CB[7]) bound with not only diselenide but also ditelluride and exchange product. The dynamic nature of diselenide bond was locked after forming the inclusion complex with CB[6]. Based on this selective locking effect, the Se-Te products were reversed back to diselenide and ditelluride reactants, which was an equilibrium regulating process. Therefore, by combining CB[6]-based host-guest interaction and dynamic diselenide chemistry, the reactivity of diselenide bond and the equilibrium of Se-Te metathesis was successfully regulated.

Liu Cheng-Zhang Zhiheng-CAJ