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Updated: May 16, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Turing-Structured Covalent Organic Framework Membranes for Fast and Precise Peptide Separations.

Bingjie Gao¹, Youxin Gong¹, Zhe Zhang²

¹State Key Laboratory of Materials-Oriented Chemical Engineering, and College of Chemical Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, P.R. China.

Angewandte Chemie (International Ed. in English)

|May 7, 2025

Summary

This study introduces covalent organic frameworks (COFs) membranes with nanoscale Turing structures for efficient molecular separations. These novel membranes offer enhanced water permeation and high selectivity for valuable compounds.

Keywords:

Covalent organic frameworks (COFs)Nanofiltration Polypeptide separation Turing structures

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Wet Chemistry and Peptide Immobilization on Polytetrafluoroethylene for Improved Cell-adhesion

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Published on: August 15, 2016

Area of Science:

Materials Science
Chemical Engineering
Nanotechnology

Background:

Turing structures in membranes enhance water permeation via internal cavities.
Existing Turing structures have limitations in porosity, hindering precise molecular separations.
Covalent organic frameworks (COFs) offer tunable properties for advanced membrane applications.

Purpose of the Study:

To develop COF membranes with nanoscale striped Turing structures for advanced molecular separations.
To overcome limitations of existing Turing structures for precise separation applications.
To demonstrate the potential of COF-based Turing structures in high-value separations.

Main Methods:

Fabrication of COF membranes on polymeric substrates using metal-polyphenol chemistry.
Controlled synthesis of nanoscale striped Turing structures via "local activation and lateral inhibition".
Characterization of membrane performance for water permeance and molecular selectivity.

Main Results:

Achieved water permeance of 45.0 L m⁻² h⁻¹ bar⁻¹, 13 times higher than non-Turing membranes.
Demonstrated ultrahigh selectivity (up to 638) for model peptides.
Successfully created COF membranes with externally striped and internally cavitated Turing architectures.

Conclusions:

Turing structures can be effectively created in COF membranes for separation applications.
COF-based Turing membranes exhibit superior performance in fast and precise molecular separations.
This technology holds promise for separating high-value pharmaceuticals and other complex molecules.