向高度连接的网络扩展网状化学构建块库:基于18个连接的三角形体超多面体的超孔MOF
Konstantinos G Froudas1, Maria Vassaki1, Konstantinos Papadopoulos1
1Department of Chemistry, University of Crete, Heraklion 71003, Greece.
Journal of the American Chemical Society
|March 1, 2024
概括
研究人员发现了新的18个连接的三元构建块 (tbb
科学领域:
- 材料化学
- 纳米技术
- 超分子化学
背景情况:
- 金属有机框架 (MOF) 具有不同的结构和特性.
- 网状化学加速了MOF的发现,但需要高度连接的构建块.
- 连接性>12的构件很少见,对于合理的MOF设计至关重要.
研究的目的:
- 发现和合成新的,高度连接的MOF构建块.
- 将这些构建块组装成具有层次孔隙性的独特MOF.
- 评估产生的MOF的气体储存能力.
主要方法:
- 使用网状化学原理来设计和合成18个连接的三元构建块 (tbb).
- 用铁集群和碳酸盐连接器组装成Fe-tbb-MOF-x材料的tbb单元.
- 使用气体吸附等热体 (Ar,CH4,CO2) 进行孔隙性表征,并评估H2和CH4储存能力.
主要成果:
- 发现了新的18连接的三角 prismatic三元构建块 (tbb).
- 合成的Fe-tbb-MOF-x材料表现出层次的微孔性和中孔性.
- 实现了超高的BET表面积 (42634847 m2g-1) 和孔径 (1.952.29 cm3g-1).
- 证明了极好的冷吸收H2储存 (11.6%/41.4g L−1) 和近环境的CH4储存 (367 mg g−1/160 cm3 STP cm−3).
结论:
- 发现18个连接的tbb构建块扩大了MOF网状化学的可能性.
- -tbb-MOF-x材料具有特殊的孔隙性和气体储存性能.
- 这项工作为设计可调节孔隙的MOF铺平了道路.
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