Redox-Activated Electronic Bridges Enabling Selective Photophysical Coupling via Quantum Dot-Hydrogen-Bonded Organic
Alituniguli Maimaiti1, Bing Yan1
1Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai200092, China.
Analytical Chemistry
|June 18, 2026
Summary
Researchers developed a quantum dot-hydrogen-bonded organic framework (QD-HOF) assembly. This system uses glutathione to control light emission, enabling precise molecular detection through dual optical signals.
Area of Science:
- Materials Science
- Nanotechnology
- Supramolecular Chemistry
Background:
- Precise control over photophysical interactions in multi-emissive materials is crucial for advanced applications.
- Designing materials with tunable inter-domain coupling is a significant challenge.
Purpose of the Study:
- To develop a quantum dot-hydrogen-bonded organic framework (QD-HOF) assembly for controlled photophysical interactions.
- To utilize the glutathione redox pair as a redox-activated electronic bridge for programming inter-domain coupling.
- To enable molecular discrimination through dual optical outputs.
Main Methods:
- Fabrication of a QD-HOF assembly incorporating CdTe quantum dots and a triazine-based TB-HOF.
- Utilizing the reduced and oxidized forms of glutathione to modulate electronic coupling between quantum dots and the HOF.
- Employing spectroscopic techniques (e.g., fluorescence) and theoretical analyses to investigate photophysical responses.
Main Results:
- Reduced glutathione facilitated an efficient bridging pathway, activating dual emissive channels and yielding a ratiometric photoluminescence response.
- Oxidized glutathione preferentially interacted with the framework, amplifying HOF emission and maintaining quantum dot decoupling.
- Demonstrated redox-state-dependent switching of photophysical coupling topology for molecular discrimination via ratiometric fluorescence and colorimetric responses.
Conclusions:
- Redox-activated molecular bridging is identified as a general mechanism for programming selective photophysical communication in multi-emissive systems.
- The QD-HOF assembly provides a conceptual framework for dynamic interface regulation in advanced luminescent materials.
- This approach enables reliable molecular sensing with dual optical readouts.
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