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Updated: May 16, 2025
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Low-energy Cathodoluminescence for OxyNitride Phosphors
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Acid/Base-Responsive Circularly Polarized Luminescence Emitters with Configurationally Stable Nitrogen Stereogenic
Pablo García-Cerezo1, Marcos D Codesal1, Arthur H G David2,3
1Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada (UGR), Avda. Fuente Nueva S/N, Granada, 18071, Spain.
Advanced Materials (Deerfield Beach, Fla.)
|May 15, 2025
Summary
Tröger
Area of Science:
- Organic Chemistry
- Materials Science
- Photochemistry
Background:
- Tertiary amines undergo rapid configurational interconversion.
- Tröger's base analogs offer stable diazocine cores.
- Ethylene bridges enhance configurational stability in acidic media.
Purpose of the Study:
- To synthesize methano- and ethano-bridged Tröger's base analogs with peripheral fluorophores.
- To evaluate the circularly polarized luminescence (CPL) properties of these novel compounds.
- To demonstrate the potential of Tröger's base analogs as CPL emitters and switches.
Main Methods:
- A two- to three-step synthesis of Tröger's base analogs.
- Functionalization with anthracene, pyrene, and 9,9-dimethylfluorene units.
- Protonation/deprotonation studies to modulate CPL response.
Main Results:
- Synthesized Tröger's base analogs with good CPL dissymmetry factors and brightness.
- Achieved excellent fluorescence quantum yields.
- Demonstrated a reversible CPL switch using ethano-bridged analogs through acid-base treatment.
Conclusions:
- Tröger's base is a versatile scaffold for creating CPL emitters.
- Functionalized analogs exhibit promising CPL properties.
- The developed CPL switch is reversible and efficient, suitable for sensors and materials.
Keywords:
Tröger's Basechiroptical switchcircularly polarized luminescenceconfigurationally stable nitrogensfluorophoresMore Related Videos
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