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Framework-Shrinkage-Induced Wavelength-Switchable Lasing from a Single Hydrogen-Bonded Organic Framework
Yuanchao Lv1,2, Zhile Xiong1, Yunbin Li1
1Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China.
The Journal of Physical Chemistry Letters
|December 28, 2021
Summary
Researchers developed hydrogen-bonded organic frameworks (HOFs) for tunable, switchable micro-lasers. This approach avoids damaging charge exchanges, enabling on-demand nanophotonics performance for miniaturized lasers.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Porous organic materials (POMs) show promise for miniaturized lasers.
- Coordination interactions in POM lasers often cause optical quenching, limiting applications.
Purpose of the Study:
- To develop a novel approach for in situ wavelength-switchable lasing using hydrogen-bonded organic frameworks (HOFs).
- To overcome limitations of current POM lasers by avoiding charge-exchange-induced optical quenching.
Main Methods:
- Constructed a flexible HOF from gain blocks with rotatable units.
- Utilized framework shrinkage triggered by guest absorption/desorption to tune HOF properties.
- Investigated the effect of framework shrinkage on gain block conformation and conjugation.
Main Results:
- Achieved reversible framework shrinkage in the HOF.
- Demonstrated in situ regulation of gain block conformation and conjugation, leading to blue/green emissions.
- Realized in situ wavelength-switchable lasing in HOF microcrystals.
Conclusions:
- Flexible HOFs enable on-demand, switchable lasing by controlling framework shrinkage.
- This method provides a new pathway for designing advanced nanophotonic devices.
- Offers insights into utilizing HOFs for tunable miniaturized laser applications.
