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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
Dialysis01:15

Dialysis

Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
Introduction to Membrane Proteins01:16

Introduction to Membrane Proteins

The cell membrane, or plasma membrane, is an ever-changing landscape. It is described as a fluid mosaic where various macromolecules are embedded in the phospholipid bilayer. Among the macromolecules are proteins. The protein content varies across cell types. For example, mitochondrial inner membranes contain ~76% protein content, while myelin contains ~18% protein content. Individual cells contain many types of membrane proteins—red blood cells contain over 50—and different cell types have...

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Updated: Jun 28, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

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

Published on: August 16, 2018

Ion-Permselective Porous Organic Cage Membranes.

Tingting Xu1, Zheng Liu1, Shuhong Zhao1

  • 1State Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, China.

Angewandte Chemie (International Ed. in English)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

Porous organic cages (POCs) offer tunable membranes for precise ion separation. This review details POC design, fabrication, and mechanisms for advanced separation systems.

Keywords:
ion selectivityion separationporous materialsporous membranesporous organic cages

Related Experiment Videos

Last Updated: Jun 28, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

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

Published on: August 16, 2018

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Separation Science

Background:

  • Porous organic cages (POCs) are molecular porous materials with tunable pore architectures and solution processability.
  • POCs show promise for membrane-based ion separation due to their structural confinement and tunable ion-channel interactions.

Purpose of the Study:

  • To systematically review recent advances in POC-based ion separation membranes.
  • To emphasize molecular design, membrane fabrication, interfacial engineering, and separation mechanisms.
  • To provide insights into design principles and challenges for high-performance membranes.

Main Methods:

  • Literature review of recent advances in POC-based ion separation.
  • Analysis of molecular design strategies for POCs.
  • Examination of membrane fabrication techniques and interfacial engineering approaches.
  • Discussion of separation mechanisms in POC membranes.

Main Results:

  • POCs enable selective separation of ions with similar sizes and properties.
  • Advances in POC design and fabrication have led to improved membrane performance.
  • Interfacial engineering plays a crucial role in optimizing POC membrane selectivity and permeability.

Conclusions:

  • POCs represent a promising platform for next-generation ion separation membranes.
  • Further research into design principles and overcoming challenges is needed for high-performance POC membranes.
  • POC-based membranes offer a conceptual framework for future ion separation systems.