通过基于独特的 [2.2] 环旋风脚手架的金属有机框架的网状结构使水吸附进化成为可能
Wei Gong1,2, Haomiao Xie2, Karam B Idrees2
1School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Journal of the American Chemical Society
|January 21, 2022
概括
这项研究引入了基于的强金属有机框架 (Zr-MOFs),采用了可有效吸附水蒸气的环旋支架. 优化的MOF显示出高吸水率和更好的稳定性,突出显示出它们在收集水分和除湿应用中的潜力.
科学领域:
- 材料科学
- 化学学
- 纳米技术
背景情况:
- 金属有机框架 (MOF) 显示出水蒸气吸附应用的前景,如水分收集和除湿.
- 为这些应用开发强大的高性能基MOF (Zr-MOF) 是一个持续的研究挑战.
- 网状化学提供了一个设计具有定制性质的MOF的途径.
研究的目的:
- 为了合成和描述一系列强大的Zr-MOFs,使用[2.2]paracyclophane (PCP) 支架.
- 研究这些新型Zr-MOF的水蒸气吸附性能.
- 增强Zr-MOF候选物的稳定性和可回收性,用于实际应用.
主要方法:
- 使用网状化学原理来设计和合成Zr-MOF.
- 使用功能化 [2.2] 环氧化 (PCP) 来制造三种不同的碳酸盐链接剂.
- 组装了五个具有不同拓结构的Zr-MOF (NU-700,NU-405,NU-1800,NU-602,NU-913).
主要成果:
- 合成了五种具有独特拓性的Zr-MOF,包括一个新的2D网 (NU-700) 和已知的网 (fcu,flu,she,scu).
- NU-602和NU-913呈现出高吸水能力 (分别为0.72g/g和0.88g/g),具有S形异温体.
- 在40-60%的RH之间,NU-913表现出良好的工作能力 (0.72g/g),并在表面修改后提高了水解稳定性.
结论:
- 这些Zr-MOF中的框架拓和孔隙度量显著影响水蒸气吸附.
- -913表现出卓越的性能和增强的稳定性,使其成为吸水应用的强大候选者.
- 用三酸修饰表面可以提高NU-913的水解稳定性和可回收性.
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