| 초록 |
Zrconium-based metal-organic framework (MOF) and its functionalized analogues have been extensively investigated to efficiently remove chemical warfare agents and simulant as well as industrial toxic gas due to their chemical and thermal stability comparing other MOFs. We have developed a selective functionalization of Zr-bridging hydroxo species on Zr-nodes in Zr-MOFs with a triethylenediamine (TEDA) through gas phase acid-base reaction, successfully leading to formation of ionic frameworks. Remarkably, TEDA grafted MOF-808 show outstanding performance for removal of toxic chemicals, such as CK, DMMP and ammonia in humid conditions. In situ analyses demonstrate how the TEDA is selectively deposited on Zr-bridging hydroxo sites (μ3-OH) in Zr-MOFs and also operando FT-IR spectra show why TEDA grafted MOF-808 has a superior sorption characteristics. This work highlights the advantages of diamine-grafted MOFs for the preparation of versatile adsorbents. |
