On Saturday, September 26, 2026
Researchers at the University of Ulm have developed an autonomous molecular walker based on a simple phosphate group, demonstrating a new approach to synthetic molecular machines. Published in Nature Chemistry (2026, DOI: 10.1038/s41557-026-02240-4), the study describes how the phosphate moves along a hydroxy-rich molecular track through alternating cyclization and ring-opening reactions.
The system uses a carbodiimide-based chemical fuel to drive the phosphate between hydroxyl groups, allowing the molecular walker to move without manual intervention at every step. The researchers found that controlled fuel addition helped maintain movement, while excessive fuel could alter the solution conditions and slow the process.
On a glycerol-based track, the walker reached a fueled steady state in about an hour. A larger inositol-derived track presented additional structural challenges, but experiments confirmed that the phosphate could travel to every available position within approximately 10 hours.
The work draws inspiration from biological molecular machines such as motor proteins while demonstrating autonomous motion using a much smaller synthetic system. Researchers are now exploring directional movement and operation under milder conditions, with longer-term goals including transporting molecular cargo along polymer tracks.
Dawn Scientific, follows emerging developments in chemistry, molecular engineering, and laboratory science. This phosphate-based molecular walker demonstrates how fundamental chemical reactions can be engineered into autonomous systems, highlighting new possibilities for synthetic molecular machines and supramolecular chemistry.
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