CCS Chemistry | 超分子活化底物为自由基促进高效选择性光催化氧化

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近日，清华大学徐江飞副研究员等人构建了一种高效识别并且活化底物的类酶超分子催化体系。通过融合大环主体的空间效应与光诱导电子转移，该体系能选择性识别底物并将其活化为自由基物种，实现高效率、高选择性的超分子光催化氧化。葫芦[8]脲与紫精衍生物组装形成超分子催化剂，它能通过葫芦[8]脲空腔识别苄醇类底物，并在光照下将其活化为苄基自由基，显著促进了苄醇光催化氧化为醛的反应效率和选择性。醛类产物会被苄醇类底物从超分子催化剂中竞争释放出来，克服了产物抑制，实现高效的催化循环。这一超分子催化剂能在苄醇羟基和硫醚基团共存时将氧化反应选择性完全逆转——优先氧化苄醇羟基而非硫醚基团。这项工作为超分子催化体系的设计提供了新思路。
文章详情：
A Supramolecular Catalyst for Selective Photo-oxidation with Catalytic Amount Enabled by Activating Substrates into Radicals
Xingchen Tang, Junrui Qin, Weiquan Xu, Jiang-Fei Xu* and Xi Zhang
Cite This: CCS Chem. 2025, Just Published. DOI: 10.31635/ccschem.025.202405229
文章链接：https://doi.org/10.31635/ccschem.025.202405229
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