通过辅助配体引入重塑 MOF 的孔道以提高稳定性和选择性 CO 捕集。

Remoulding a MOF's pores by auxiliary ligand introduction for stability improvement and highly selective CO-capture.

机构信息

College of Chemistry and Molecular Engineering, Zhengzhou University, Science Road No. 100, Zhengzhou 450001, China.

出版信息

Chem Commun (Camb). 2018 Oct 23;54(85):12029-12032. doi: 10.1039/c8cc06593d.

Abstract

A new highly porous mixed-valence metal-organic framework, Co-pydc, was synthesized and characterized. Upon guest loss, Co-pydc irreversibly transformed to a closed structure and lost pore functionality. Then an auxiliary ligand was introduced as a girder to support the framework in the synthesis process, and successfully afforded a new porous MOF, Co-pydc-TPB. This displays a considerably enhanced robust framework which is resistant to guest loss and stable up to 400 °C, retains single-crystallinity at 300 °C, shows good water and alkali resistance, and selective adsorption of CO2 over N2 at room temperature.

摘要

一种新的高多孔混合价态金属有机骨架 Co-pydc 被合成并进行了表征。在失去客体后，Co-pydc 不可逆地转化为封闭结构并失去了孔功能。然后引入辅助配体作为大梁，在合成过程中支撑骨架，成功得到了一种新的多孔 MOF，Co-pydc-TPB。该材料显示出相当增强的稳健骨架，对客体损失具有抗性，在 400°C 下稳定，在 300°C 下保持单晶结构，具有良好的耐水和耐碱性能，以及在室温下对 CO2 的选择性吸附超过 N2。