CRYSTAL ANISOTROPY IN MULTIVARIATE METAL-ORGANIC FRAMEWORKS (MTV-MOF) AND THEIR IMPACT ON THE ADSORPTION PROPERTIES

SOYEON KO; UNJIN RYU; HYUNJIN PARK; ALEJANDRO M. FRACAROLI; KYUNGMIN CHOI

Cancún

Congreso; XXX International Materials Research Congress (XXX IMRC),; 2022

Sociedad Mexicana de Materiales

The recent development of reticular chemistry field has empowered scientists around the world to creatively design extended solid materials such as metal-organic frameworks (MOF) [1]. The opportunity of choosing from almost endless options of building units and also post-synthetically functionalizing the materials set the scene for a large number of new compounds and synergistic properties by combining exquisite control over the topology and identity of the solid open spaces (i.e. pores at MOFs). In this work, we demonstrate a new strategy of controlling the crystal's anisotropy to access unknown adsorption properties. Specifically, we prepared mesoscopic core-shell-type mesoscopic structures of multivariate materials [2], using terephthalic acid (BDC-H) and 2-aminoterephthalic acid (BDC-NH2) as organic struts. We compared a mechanical mixture of UiO-66 and UiO-66-NH2 (denoted mix-UiO-66) and MTV-UiO-66, with two core-shell structures: MTV-UiO-66-H⊂NH2 and MTV-UiO-66-NH2⊂H. As all the prepared materials contain the same organic strut ratio (BDC-H/BDC-NH2, 33:67), we compared the impact of the struts distribution throughout the crystals with respect to the CO2 and H2O adsorptive properties.