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Benzimidazole-Based N,O Boron Complexes as Deep Blue Solid-State Fluorophores.
Patrícia A A M Vaz1,2, João Rocha2, Artur M S Silva1
1LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
Materials (Basel, Switzerland)
|August 7, 2021
Summary
New halogenated benzimidazole-based boranils show tunable optoelectronic properties. These compounds exhibit deep blue light emission in solid state, crucial for developing advanced blue emitting materials.
Area of Science:
- Organic Chemistry
- Materials Science
- Photophysics
Background:
- Benzimidazole derivatives are versatile organic compounds.
- Optoelectronic properties are crucial for material applications.
- Halogen substituents can significantly tune molecular properties.
Purpose of the Study:
- To synthesize novel benzimidazole-based boranils.
- To investigate the impact of halogen substituents on optoelectronic characteristics.
- To explore their potential as blue emitting materials.
Main Methods:
- Chemical synthesis of benzimidazole-based boranils.
- Photoluminescence spectroscopy in solution and solid state.
- Characterization of Commission Internationale de l'Éclairage (CIE) coordinates.
Main Results:
- All synthesized compounds demonstrated photoluminescence.
- Boronils exhibited lower emission wavelengths compared to free ligands due to suppressed excited-state intramolecular proton transfer.
- Specific boranils showed deep blue emission with desirable CIE coordinates (x < 0.16, y < 0.04) in the solid state.
Conclusions:
- Halogen substituents effectively modulate the optoelectronic properties of benzimidazole-based boranils.
- The synthesized boranils are promising candidates for solid-state blue light-emitting applications.
- Elimination of excited-state intramolecular proton transfer leads to desirable emission characteristics.
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