Examples of microporous materials include zeolites and metal-organic frameworks.
The recommendations of a panel convened by the International Union of Pure and Applied Chemistry (IUPAC) are:[1] Micropores may be defined differently in other contexts.
For example, in the context of porous aggregations such as soil, micropores are defined as cavities with sizes less than 30 μm.
[2] Microporous materials are often used in laboratory environments to facilitate contaminant-free exchange of gases.
Mold spores, bacteria, and other airborne contaminants will become trapped, while gases are allowed to pass through the material.