Negative-Linear-Compressibility-Driven Structural Rigidification Enables High-Efficiency Blue Emission in MIL-116(Al)
Ting Zhang1, Shuo Shan2, Yunjia Bai1
1State Key Laboratory of High Pressure and Superhard Materials, Synergetic Extreme Condition High-Pressure Science Center, College of Physics, Jilin University, Changchun 130012, China.
Nano Letters
|February 16, 2026
Summary
Applying pressure to luminescent metal-organic frameworks (MOFs) enhances their blue light emission. This strategy improves structural stability and boosts efficiency for optoelectronic applications.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Luminescent metal-organic frameworks (MOFs) offer tunable properties for bioimaging, sensing, and environmental monitoring.
- Achieving optimal structural stability, active site density, and emission efficiency in photofunctional MOFs is challenging.
- MIL-116(Al) exhibits stability and active sites but suffers from weak luminescence.
Purpose of the Study:
- To develop a pressure treatment strategy for enhancing the blue emission of MIL-116(Al).
- To investigate the mechanism of pressure-induced luminescence enhancement in MOFs.
Main Methods:
- Utilizing a pressure treatment strategy on MIL-116(Al).
- Analyzing pressure-induced negative linear compressibility.
- Investigating changes in hydrogen bonding and molecular motion.
Main Results:
- Pressure treatment significantly enhanced the blue emission of MIL-116(Al).
- Photoluminescence quantum yield increased from 4.5% to 60.7%.
- Pressure induced strengthened hydrogen bonds and rigidification of aromatic linkers, suppressing non-radiative pathways.
Conclusions:
- Pressure treatment is an effective strategy for optimizing photofunctional MOFs.
- This method enhances luminescence efficiency by controlling the local structural environment.
- The findings have broad implications for developing advanced optoelectronic materials.
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