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Related Experiment Video

Updated: Jun 3, 2026

Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture

Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture

Published on: May 13, 2018

Activating catalysts with mechanical force.

Alessio Piermattei¹, S Karthikeyan, Rint P Sijbesma

¹Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands.

Nature Chemistry

|March 8, 2011

Summary

This summary is machine-generated.

Researchers developed a new method to activate latent catalysts using mechanical force, specifically ultrasound. This mechanochemical catalyst activation opens doors for novel applications in signal transduction and self-healing materials.

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Area of Science:

Catalysis
Mechanochemistry
Materials Science

Background:

Homogeneously catalyzed reactions are typically activated by heat or chemicals.
Mechanical activation of homogeneous catalysts has not been previously demonstrated.
Latent catalysts offer controlled initiation of chemical reactions.

Purpose of the Study:

To introduce a general method for activating latent catalysts using mechanical force.
To demonstrate the catalytic activity of metal complexes activated by mechanical bond breaking.
To explore potential applications of mechanochemical catalyst activation.

Main Methods:

Mechanically breaking the bond between a metal and its ligand using ultrasound.
Utilizing polymer-functionalized N-heterocyclic carbene ligands for silver(I) complexes.
Employing ruthenium biscarbene complexes with appended polymer chains.

Main Results:

Ultrasound successfully activated latent silver(I) organocatalysts for transesterification.
Ultrasonic activation of ruthenium complexes catalyzed olefin metathesis reactions.
Catalytic activity was attributed to ligand dissociation induced by mechanical forces.

Conclusions:

Mechanochemical catalyst activation is achievable through mechanical bond disruption.
This method enables the "switching on" of homogeneous catalysts via mechanical triggers.
Potential applications include mechanical signal transduction and mechanically initiated polymerizations for self-healing materials.