金属位点替换在新型金属有机框架合成中的应用进展

Progress in the Application of Metal Ion Replacement in the Synthesis of Novel Metal-Organic Frameworks

【目的】金属有机框架被广泛应用于气体吸附分离、催化等领域中,但大多数金属有机框架因稳定性问题而使其应用受到严重限制,本研究对高稳定性的金属有机框架进行研究。【方法】在保持金属有机框架原有结构的基础上,通过原位替换法来对金属有机框架中的金属离子或团簇进行替换,在获得性质更加优异的新型金属有机框架的同时,其孔结构还得到很好的保持。【结果】研究结果表明:从金属离子替换的一般规则和影响金属离子交换的因素这两方面出发,对该类MOFs进行研究,为构建新型金属有机框架提供理论支持。【结论】通过对该类MOFs的应用前景进行展望,推测今后的发展方向主要是提高金属离子替换率和深入研究替换机理,研究结果为后续相关研究提供参考。

[Purposes]Metal-organic frameworks are widely used in gas adsorption separation,catalysis and other fields.However,most metal-organic frameworks are severely limited in application due to stability problems.In this study,metal-organic frameworks with high stability were studied.[Methods]The metal ions in the metal-organic framework were replaced by in-situ substitution method.On the basis of maintaining the original structure of the metal-organic framework,the metal ions or clusters were replaced.While obtaining a new type of metal-organic framework with more excellent properties,its pore structure was also well maintained,and its stability mechanism was studied.[Findings]The research results show that this kind of MOFs is studied from the two aspects of the general rules of metal ion substitution and the factors affecting metal ion exchange,which provides theoretical support for the construction of new metal organic frameworks.[Conclusions]By looking forward to the application prospect of this kind of MOFs,it is speculated that the future development direction is mainly to improve the replacement rate of metal ions and further study the replacement mechanism.The research results provide reference for subsequent related research.