METAL-ORGANIC FRAMEWORKS (MOF) FOR SELECTIVE CAPTURE AND FIXATION OF AIR TOXINS

RYU UNJIN; JEE SEOHYEON; RITA HOYOS DE ROSSI; KYUNGMIN CHOI; ALEJANDRO M. FRACAROLI

Cancun

Conferencia; XXIX International Materials Research Congress - IMRC 2021; 2021

Reticular chemistry is a recently developed field that empowered scientists worldwide to creativelydesign new extended solid materials such as metal-organic frameworks (MOF) [1], with exquisitecontrol over the topology and identity of the solid open spaces (i.e. pores at MOFs). This control ofthe material?s design allowed us to successfully prepare highly porous and crystalline materials forimpactful applications such as detection and removal of air toxins [2]. High selectivity, irreversibility,and adaptability to wearable devices are key factors for the design of new adsorbent materials forair filtration devices. MOFs are posed to be ideal porous materials for this particular application dueto their extremely high surface area and pore-tunability by the means of reticular chemistry andpost-synthetic modifications. In this work, we study the capability of highly porous and water-stableZr-based MOFs (UiO-66, UiO-67, and MOF-808) towards the adsorption of a customized andsynthetic dye (rhodamine 6G-based sensor, or RDS) able to selectively and irreversibly detect andtrap organophosphates such as diethyl chlorophosphate (DCP), a model compound to Sarin gas. Ourresults show that the organic dye is adsorbed in different amounts depending upon the pore size ofthe MOF. This differences in the adsorption capabilities for the evaluated MOFs, led to differentsensitivities and capacities of these resultant materials, to detect and irreversible trap DCP.