不寻常的金属有机框架拓和辐射抵抗通过海王星协调化学
Sara E Gilson1, Melissa Fairley2, Sylvia L Hanna3
1Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Journal of the American Chemical Society
|October 15, 2021
概括
研究人员开发了一种新型的金属有机框架 (MOF), 这种超的MOF比单独的有机连接剂对玛射线具有更强的抵抗力.
科学领域:
- 材料科学
- 放射化学
- 晶体学
背景情况:
- 金属有机框架 (MOF) 为各种应用提供可调节的结构.
- 超元素,如海王星,在材料合成和稳定性研究中提出了独特的挑战.
- 乙-乙相互作用 (AAI) 越来越多地被认为是它们在构建新型协调化合物的作用.
研究的目的:
- 合成和表征一个neptunyl(V) 金属有机框架 (MOF).
- 在玛辐射下研究这种超MOF及其有机连接剂的辐射稳定性.
- 探索AAI在设计新的MOF拓中的潜力.
主要方法:
- 合成和单晶X射线衍射使用四面体四面体有机配体 (NSM) 的neptunyl(V) MOF.
- 在高剂量 (高达6MGy) 中对MOF及其有机连接剂进行马辐射.
- 使用X射线衍射和光谱进行辐射后分析,以评估结构和化学变化.
主要成果:
- 一种新的阳离子MOF结构被阐明,它由AAI和有机链接器连接的状链.
- MOF具有前所未有的网络拓,展示了AAI在MOF构建中的实用性.
- 与其有机连接剂相比,neptunyl MOF具有优越的辐射耐受性,仅在大约6MGy的马辐射后才观察到显著的结构变化.
结论:
- 这项研究介绍了使用AAI的第一个跨MOF,为MOF设计和拓开辟了新的途径.
- 合成的氨酸MOF具有显著的辐射稳定性,其性能优于其有机构件.
- 这项工作突显了基于活性的MOF在需要高辐射耐受性的应用中的潜力.
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