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Updated: Feb 11, 2026
08:12
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
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Engineering Covalent Organic Frameworks with Dual Hydrophilic Sites for Subsecond Moisture-Triggered Chromic
Fei Li1,2, Yun-Long Zhang1, Jing-Lan Kan1
1College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, P. R. China.
ACS Applied Materials & Interfaces
|February 9, 2026
Summary
Researchers developed a smart material that rapidly switches color with moisture. This covalent organic framework (COF) offers fast, reversible color changes for anticounterfeiting and metabolite detection.
Area of Science:
- Materials Science
- Chemistry
Background:
- Stimuli-responsive smart materials are crucial for advanced technologies.
- Rapid and reversible color switching materials are highly sought after.
Purpose of the Study:
- To develop a novel covalent organic framework (COF) with ultrafast, reversible moisture-triggered color switching.
- To explore the potential applications of this COF in anticounterfeiting and metabolite detection.
Main Methods:
- Synthesized a PT-COF using tartaric acid dihydrazide (TAD) and an aldehyde monomer.
- Investigated the material's response to low humidity.
- Evaluated color and fluorescence switching properties and cycling stability.
Main Results:
- The PT-COF exhibited ultrafast (<1.0 s) reversible color switching between yellow and orange states upon exposure to low humidity.
- The material displayed reversible changes in fluorescence intensity.
- Demonstrated excellent cycling stability for both color and fluorescence changes.
Conclusions:
- The dual-hydrophilic-site design of PT-COF enhances moisture sensitivity.
- PT-COF shows significant promise for applications in anticounterfeiting and sensitive metabolite detection.
Keywords:
anticounterfeitingcolor switchingcovalent organic frameworkdual hydrophilic siteshumidity-responsivemetabolite detectionMore Related Videos
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