Metal-organic frameworks (MOFs) are materials that contain metal centers coordinated by organic molecules that form an extended, porous lattice. These MOFs are of interest in the field of sensing for their unique properties such as high stability, high surface area, high crystallinity, and ability to perform small molecule exchange. Luminescent metal-organic frameworks (LMOFs) are of specific interest since they contain the potential to detect volatile organic compounds via adsorption into the porous framework. Luminescent properties can be imparted to MOFs in several ways. This project focused on the inclusion of the luminescent osmium complex Os(dcphen)(CO)<sub>2</sub>(Cl)<sub>2</sub> (dcphen = 1,10-phenanthroline-4,7-dicarboxylic acid) into the MOF scaffold. The optimization of the osmium complex synthesis will be detailed. Doping of several zinc-carboxylate MOF systems with the luminescent osmium complex was explored to observe the emission of the materials in multiple types of solvents. Functionalization of the pore walls within the MOF was carried to enhance host-guest interactions between the system and guest molecules. The photophysical properties of the LMOFs in the presence of both polar and nonpolar guest molecules will be detailed.

Incorporation of luminescent osmium complexes into metal-organic frameworks: Optimization of osmium complex synthesis and effect of MOF structure on complex inclusion and emission

ACS Spring 2022

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