The incorporation of group-16 elements in organic materials can impart new or improved physical properties. Organotellurium compounds exhibit unique halogenation chemistry where facile halogenation and photo-dehalogenation occurs. These processes are potentially useful for photocatalyzed reactions and may be advantageous in metal-ligand sensors. Thermally activated delayed fluorescence (TADF) is gaining increasing attention for light emitting applications. In this vein, the substitution of heavier group-16 elements for sulfur in organic TADF emitters is expected to improve device efficiencies by facilitating faster reverse intersystem crossing through enhanced spin-orbit coupling. The investigation of these elements in materials is relatively underexplored compared to sulfur, due largely to a lack of synthetic methods to access the desired molecules. The synthesis for the selective incorporation of these elements and characterization for these two material applications will be discussed.

Synthesis and characterization of selenium and tellurium containing organic materials toward sensors and emitters

2019 Fall National Meeting

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