A new post-synthetic polymerization strategy makes metal–organic frameworks more stable

摘要: Metal–organic frameworks are of interest in a number host–guest applications. However, their weak coordination bonding often leads to instability aqueous environments, particularly at extreme pH, and hence, is challenging topic the field. In this work, two-step, post-synthetic polymerization method used create series highly hydrophobic, stable MOF composites. The MOFs first coated with thin layers polydopamine from free-base dopamine under mild oxygen atmosphere, which then undergoes Michael addition covalently graft hydrophobic molecules external surface. This easy, modification shown significantly improve stability structurally diverse including HKUST-1 (Cu), ZIF-67 (Co), ZIF-8 (Zn), UiO-66 (Zr), Cu-TDPAT Mg-MOF-74 (Mg) MIL-100 (Fe) wet, caustic (acidic basic) environments as determined by powder X-ray diffraction surface area measurements.