金属有机的微调孔:溶液和固态二氧化碳的封装
Xiang Zhang1,2, Xia Dong2, Weigang Lu1
1College of Chemistry and Materials Science , Jinan University , Guangzhou 510632 , People's Republic of China.
Journal of the American Chemical Society
|July 3, 2019
概括
研究人员开发了可调节的金属有机,用于选择性二氧化碳 (CO2) 封装. 这些子模仿生物功能, 在压力下捕获二氧化碳, 当压力下降时释放它.
科学领域:
- 材料科学
- 超分子化学
- 化学工程
背景情况:
- 金属有机 (MOCs) 显示为生物功能的人工模型,特别是选择性分子封装.
- 对MOC结构和毛孔大小的精确控制对于目标客分子相互作用至关重要.
研究的目的:
- 为选择性二氧化碳 (CO2) 封装设计和合成具有可调节开口的新型Ni-imidazolate.
- 研究孔径大小和金属离子组成对二氧化碳捕获能力的影响.
主要方法:
- 通过连接器装饰和金属离子杂交合成二面体Ni-imidazolate (Ni14L24).
- 在不同压力条件下对溶液和固态二氧化碳封装的研究.
- 只有Ni的子与Ni-Cu异核子的比较研究.
主要成果:
- 在Ni14L24中实现了可调节的开口,使选择性CO2封装成为可能.
- 根据压力变化 (2.0-3.0 bar) 观察到CO2在甲醇溶液中进入和退出.
- 在高压 (15.0-30.0bar) 和超临界条件下证明了固态CO2封装.
- 在异质核中用Cu2+取代Ni2+消除了CO2封装,尽管孔径尺寸变化很小.
结论:
- 精确控制的金属有机可以有效地封装二氧化碳.
- 动态孔径和金属离子组成显著影响二氧化碳封装机制.
- 这些发现为设计用于气体分离和储存的先进材料提供了洞察力.
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