Sun Feb 01 14:09:19 UTC 2026: ### Headline: IIT-Gandhinagar Develops Ultra-Precise “POMbranes” for Molecular Sieving
The Story:
Researchers at IIT-Gandhinagar have developed a synthetic membrane called “POMbranes” capable of separating molecules with sub-nanometer precision. This innovation utilizes polyoxometalate (POM) clusters with a fixed 1-nm hole, providing a consistent and accurate filtering mechanism, unlike traditional filters. The POMbranes are composed of POM clusters with alkyl chain “tails” that allow self-assembly into flexible thin films. These membranes show potential for water purification, carbon capture, and pharmaceutical manufacturing.
Key Points:
* The study was published in the Journal of the American Chemical Society on January 13, 2026.
* The “POMbranes” are based on polyoxometalate (POM) clusters with a 1-nm hole.
* Alkyl chain “tails” enable the POM clusters to self-assemble into flexible thin films.
* Tail length determines filter precision: short tails (Q4) offer faster but less precise filtering, while longer tails (Q7 and Q10) provide high precision.
* Q7 and Q10 POMbranes can separate molecules differing in weight by just 100-200 daltons, which is 10x better than current membranes.
* The membranes are stable across different acidity levels and can be manufactured in large sheets.
Key Takeaways:
* The development of “POMbranes” represents a significant advancement in molecular separation technology.
* The precise and stable nature of these membranes offers a potential solution for critical industrial applications.
* The ability to separate molecules with high precision could revolutionize water purification, carbon capture, and pharmaceutical manufacturing processes.
First Piper 