Tang Xiaoyan, Yang Yuchong, Kang Yuetong, Wu Han, Xu Jiang-Fei, Wang Zhiqiang
Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
Langmuir. 2020 Jun 2;36(21):5954-5959. doi: 10.1021/acs.langmuir.0c00806. Epub 2020 May 21.
Herein, we propose a new method for promoting the degradation of a perylene diimide (PDI) dye, through a Fenton reaction with cucurbit[8]uril (CB[8]) as a supramolecular catalyst. The CB[8] can encapsulate the hydrophobic moiety of the PDI dye and inhibit its aggregation in aqueous solutions, thus increasing the collision frequency between the PDI and oxidants to accelerate the reaction. As a result, the encapsulated PDI molecule is preferentially degraded, followed by freeing the cavity of CB[8] and enabling it to encapsulate another PDI molecule to realize a catalytic cycle. Hence, a catalytic amount of CB[8] is sufficient to accelerate the the Fenton degradation. It is anticipated that this work will extend the realm of supramolecular catalysis systems and enrich the field of degradation of polycyclic aromatic dyes.
在此，我们提出了一种新方法，通过以葫芦[8]脲（CB[8]）作为超分子催化剂的芬顿反应来促进苝二亚胺（PDI）染料的降解。CB[8]可以包封PDI染料的疏水部分并抑制其在水溶液中的聚集，从而增加PDI与氧化剂之间的碰撞频率以加速反应。结果，被包封的PDI分子优先降解，随后释放CB[8]的空腔并使其能够包封另一个PDI分子以实现催化循环。因此，催化量的CB[8]足以加速芬顿降解。预计这项工作将扩展超分子催化系统的领域并丰富多环芳族染料的降解领域。
