Benzimidazole-Based N,O Boron Complexes as Deep Blue Solid-State Fluorophores

Benzimidazole-based boranils were designed and synthesized in order to assess the influence of halogen substituents on their optoelectronic properties. All compounds are photoluminescent in solution and solid state. Compared to the free ligands, the new boranils emit at a lower wavelength, by elimination of the excited-state intramolecular proton transfer observed with the ligands. In the solid state, some of the boranils exhibit a deep blue emission, presenting Commission Internationale de l'eclairage (CIE) coordinates with an x-component of less than 0.16 and a y-component smaller than 0.04, highly desired values for the development of blue emitting materials.

Automated summary

Benzimidazole-based boranils were designed and synthesized to evaluate the impact of halogen substituents on their optoelectronic properties. The newly synthesized boranils emit at lower wavelength compared to the free ligands, exhibiting deep blue emission in the solid state, which is desirable for the development of blue-emitting materials.