光催化
氧化还原
催化作用
氮化碳
磁道(磁盘驱动器)
碳纤维
电子
材料科学
光催化
化学
氮化物
光化学
纳米技术
组合化学
无机化学
有机化学
计算机科学
复合材料
物理
操作系统
复合数
量子力学
图层(电子)
作者
Chong Wang,Shiru Lin,Yichun Lu,Yuchen Hou,Aleksandr Savateev,Jiajia Cheng
标识
DOI:10.1021/acscatal.4c02395
摘要
The ionic structure of poly(heptazine imides) has a strong implication in photocatalytic hydrogen generation. From numerous reports, it is evident that these materials are also superior to covalent carbon nitrides in various organic transformations. However, the reason has been remaining vague. Herein, we report the design of a molten-salt carbon nitride (MCN) featuring ionic structure represented by negatively charged organic polymeric scaffold and K+ counterions and application of this material as the photocatalyst in synthesis of pharmaceutically relevant fluorinated heterocycles under visible light under the redox neutral conditions. K+ ions serve as the sites for sorption of ethyl bromodifluoroacetate, while the electronically excited state of MCN acts as the single electron transfer agent, enabling generation of difluoroalkyl radicals from the substrate. Combination of these two features endows a material that outperforms homogeneous photocatalysts and covalent carbon nitrides. Our protocol expands the application of carbon nitrides in synthesis of organic compounds with complex structure and provides fresh perspectives on the factors contributing to the enhanced photocatalytic efficiency of poly(heptazine imides).
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