连接转换在一个三维共价有机框架的高容量吸附的 perfluoroalkyl 物质
Andrea N Zeppuhar1, Devin S Rollins2, Dale L Huber3
1Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States.
ACS applied materials & interfaces
|November 3, 2023
概括
研究人员开发了一种新方法来功能化三维共价有机框架 (COF). 这种方法提高了它们从水中去除和多基物质 (PFAS) 的能力,特别是 perfluorooctanoic acid (PFOA).
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 环境化学环境化学
背景情况:
- 三维共价有机框架 (3D COF) 提供了显著的优势,但在合成上具有挑战性.
- 现有的修改3DCOF的方法有限,阻碍了针对特定应用的定制材料的开发.
研究的目的:
- 开发一种新的合成策略来使3D COFs具有功能.
- 创建一个功能化COF库,以评估它们在吸附per-和多醇基物质 (PFAS) 的性能.
主要方法:
- 使用固态链接转换将COF-300中的imine链接转换为amin链接.
- 由此产生的氨基功能化COF与各种电友反应,以引入多种功能组.
- 从水中评估了功能化COF对PFAS,特别是 perfluorooctanoic acid (PFOA) 的吸附能力.
主要成果:
- 这种转化产生了更水解稳定的材料,具有可访问的核性氨基基群.
- 使用二甲基基 (COF-300-二甲基) 的功能化导致PFOA吸附的显著增强.
- 与原始COF-300相比,COF-300-二甲基表明PFOA吸附的14500倍改善,达到250毫克/克以上.
结论:
- 固态链接转换为合成功能3DCOF提供了一种多功能途径.
- 静电相互作用在PFAS的有效吸附中发挥着至关重要的作用.
- 这项工作为设计和合成用于环境修复的高级功能3DCOF提供了一个新的范式.
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