Porous Organic Cages as Building Blocks for Framework Materials
Marcos Martínez-Fernández1, Yannic Hartmann1, Bernd M Schmidt1
1Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany.
Angewandte Chemie (International Ed. in English)
|June 30, 2025
Summary
Porous organic cages (POCs) are used to build advanced materials like Cage-COFs and Cage-MOFs. These hybrid materials offer precise control over porosity and enhanced chemical stability for new applications.
Area of Science:
- Materials Science
- Nanotechnology
- Supramolecular Chemistry
Background:
- Confined nanospaces in nature inspire synthetic materials.
- Porous crystalline materials (COFs, MOFs, molecular cages) are key for catalysis, separation, and energy storage.
- Porous organic cages (POCs) are emerging as versatile building blocks.
Purpose of the Study:
- To review the integration of POCs into extended frameworks.
- To highlight the design of advanced materials using POCs.
- To discuss cage-containing polymers and supramolecular frameworks.
Main Methods:
- Integration of POCs into covalent organic frameworks (Cage-COFs).
- Integration of POCs into metal-organic frameworks (Cage-MOFs).
- Discussion of cage-containing polymers and supramolecular frameworks.
Main Results:
- Cage-COFs and Cage-MOFs offer precise porosity control and enhanced chemical robustness.
- Hybrid materials merge COF regularity with cage functionality.
- Lightweight, hierarchically organized materials are enabled.
Conclusions:
- POCs are versatile synthons for next-generation porous materials.
- These materials pave the way for functional, adaptive, and recyclable architectures.
- POCs offer a modular approach to advanced material design.
Keywords:
Covalent organic frameworksMetal‐organic frameworksPorous materialsPorous organic cagesSelf‐assemblyMore Related Videos
Related Concept Videos
Design Example: Sustainability in Concrete Building
229
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
229
Ferrocement
342
Ferro-cement is a distinctive construction material that represents an innovative variant of reinforced concrete, characterized by its unique composition and the method by which it is formed. Unlike standard reinforced concrete, which relies on larger steel bars for reinforcement, ferro-cement utilizes densely packed layers of mesh or fine rods, fully encased in cement mortar. This composition allows for the creation of structures that are significantly thinner and more flexible than their...
342
Porosity in Cement Paste
233
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
233
Additives and Fillers in Concrete
135
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
The...
135


