Related Experiment Video
Updated: Jan 28, 2026
10:27
Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
Published on: July 14, 2015
10.5K
Enhancing Chemical Stability and Molecular Selectivity of Porous Organic Cages via Core-Shell Polymer Coating.
Danyu Li1, Yanling Huang1, Huiyu Liu1
1School of Physical Science and Technology, ShanghaiTech University, Shanghai, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 27, 2026
Summary
Researchers developed robust porous organic cages (POCs) using a novel coating method. These enhanced POCs demonstrate superior chemical stability and improved selectivity for gas and vapor separations, enabling industrial applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Nanotechnology
Background:
- Porous organic cages (POCs) offer potential for gas separation and storage due to their unique structures.
- Practical use of POCs is hindered by poor chemical stability and processing challenges.
- Developing robust POC-based materials is crucial for advanced separation technologies.
Purpose of the Study:
- To create stable and selective porous organic cages@polymer core-shell nanostructures.
- To enhance the chemical robustness and molecular selectivity of POCs.
- To develop a general fabrication strategy for hybrid molecular materials for demanding separations.
Main Methods:
- Chiral self-assembly of enantiomeric cage precursors to synthesize racemic POC particles.
- Non-solvent-induced surface-aimed polymerization (NISAP) for single-step polyamic acid (PAA) or polyimide (PI) coating.
- Etching and Powder X-ray Diffraction (PXRD) analyses to confirm acid resistance.
- Gas and vapor separation tests to evaluate molecular selectivity.
Main Results:
- Successfully fabricated stable, monodisperse POCs@polymer core-shell nanostructures.
- Demonstrated exceptional acid resistance of the polymer-coated POCs.
- Achieved significantly enhanced selectivity: CO2/N2 IAST selectivity of 299.5 and PX/OX selectivity of 11.3 with PAA-coated materials.
- Observed tenfold and fourfold improvements in selectivity compared to uncoated POCs.
Conclusions:
- The interfacial strategy provides a general pathway to robust hybrid molecular materials.
- POCs@polymer core-shell nanostructures exhibit improved chemical stability and selectivity.
- This approach opens new avenues for advanced separations under demanding industrial conditions.
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