Advanced Materials·· 7 小时前精选AI 评分55
调控共价有机框架局部电负性，主客体识别助力无金属氧还原
Modulating Local Electronegativity in Covalent Organic Frameworks for Host–Guest Oxygen Reduction
AI 导读
研究合成了一系列电负性可调的芴基共价有机框架（COF）宿主，利用孔内定制结合口袋增强对O2的主客体识别与吸附。优化材料的半波电位（E1/2，vs. RHE）达到0.78 V，作者称其为已报道无金属COF基催化剂中的高水平。结合原位表征与理论计算，主客体相互作用促进中间体优化吸附并加快反应动力学。
推荐理由
通过调控COF孔内局部电负性构建主客体识别位点，为无金属氧还原催化剂提供了一条分子层面设计思路。
创新点
与侧重连接化学或杂原子掺杂的常规COF不同，该工作通过分子级设计在孔内构建定制结合口袋，以局部电负性调控实现对O2的选择性识别与强相互作用。
图表、补充材料与最终表述以原文为准。阅读原文
来源：Advanced Materials · doi.org
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