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Dynamic Ultralong Organic Phosphorescence by Photoactivation
Long Gu1, Huifang Shi1, Mingxing Gu1
1Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, China.
Angewandte Chemie (International Ed. in English)
|May 17, 2018
Summary
Researchers developed new smart materials exhibiting dynamic ultralong organic phosphorescence (UOP) activated by UV light. These materials can switch between long and short phosphorescence, showing promise for anti-counterfeiting applications.
Area of Science:
- Materials Science
- Organic Chemistry
- Photophysics
Background:
- Ultralong phosphorescence in organic materials is rare and underexplored.
- Controlling phosphorescence properties dynamically is crucial for advanced material applications.
Purpose of the Study:
- To investigate and report novel molecules with dynamic ultralong organic phosphorescence (UOP).
- To explore the manipulation of intermolecular interactions for UOP activation and deactivation.
- To demonstrate the potential of these materials in anti-counterfeiting technologies.
Main Methods:
- Synthesis and characterization of organic phosphors (PCzT, BCzT, FCzT).
- UV light irradiation to induce and modulate UOP.
- Emission lifetime measurements under ambient conditions.
- Thermal treatment for phosphorescence deactivation.
Main Results:
- Successfully activated UOP in PCzT, BCzT, and FCzT with emission lifetimes from 1.8 to 1330 ms.
- Demonstrated reversible switching between UOP and short-lived phosphorescence via UV irradiation and thermal treatment.
- Applied dynamic UOP for a visual anti-counterfeiting demonstration.
Conclusions:
- Novel dynamic UOP achieved by manipulating intermolecular interactions through light stimuli.
- Developed smart materials with switchable phosphorescence properties.
- Opened new avenues for molecular motion-based optical processing and smart-response materials.
Keywords:
crystal engineeringdynamic ultralong phosphorescencemultilevel anti-counterfeitingphotoactivationphotophysicsMore Related Videos
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