Host-Guest Interactions Between Metal-Organic Frameworks and Air-Sensitive Complexes at High Temperature.

ABSTRACT: The host-guest chemistry of metal-organic frameworks (MOFs) has been attracting increasing attention owing to the outstanding properties derived from MOFs-guests combinations. However, there are large difficulties involved in the syntheses of the host-guest MOF systems with air-sensitive metal complexes. In addition, the behaviors on host-guest interactions in the above systems at high temperature are not clear. This study reported the synthetic methods for host-guest systems of metal-organic framework and air-sensitive metal complexes via a developed chemical vapor infiltration process. With the synchrotron X-ray powder diffraction (XRPD) measurements and Fourier Transform infrared spectroscopy (FTIR), the successful loadings of Fe(CO)₅ in HKUST-1 and NH₂-MIL-101(Al) have been confirmed. At high temperatures, the structural and chemical componential changes were investigated in detail by XRPD and FTIR measurements. HKUST-1 was proven to have strong interaction with Fe(CO)₅ and resulted in a heavy loading amount of 63.1 wt%, but too strong an interaction led to deformation of HKUST-1 sub-unit under heating conditions. NH₂-MIL-101(Al), meanwhile, has a weaker interaction and is chemically inert to Fe(CO)₅ at high temperatures.

SUBMITTER: Huang B 

PROVIDER: S-EPMC8369409 | biostudies-literature |

REPOSITORIES: biostudies-literature