Host-Guest UiO-66 Based Supra-MOF Assembly for Custom Designed Opto-Electronic Device

Abstract

Supramolecular chemistry adopted by the hybrid systems of metal ions and organic linkers of metal-organic frameworks (MOFs) offers not only the molecular level porous architecture but also an approach for assembly-within-assembly: Supra-MOF, for creating simpler yet multifunctional host-guest based smart material couples. In this work, Supra-MOF approach is smoothly translated to a well-known UiO-66 MOF compound to form luminescent CQDUiO-66 (CQD: carbon quantum dots) and used as a main probe in custom-designed 3D printed opto-electronic device. The device mainly explored on the basis of quenching of fluorescence ability of Iodine for the purpose of identifying the quality of edible oil samples from different commercially available brands. The photodiode based signal output from the device was used to identify the changes in the incident fluorescent light of aqueous dispersion of CQDUiO-66 affected by the rejected iodine from the oil portion. The application of MOF based compound in a proof-of-concept opto-electronic device sheds light on the impact of temperature (heating) with the time on edible oil saturation/unsaturation levels using a quick and newly developed method of determining iodine value (Iv) of oil samples.