Twist and Shout: Single-Molecule Mechanochemistry.

Area of Science:

• Chemistry
• Materials Science
• Polymer Science

Background:

• Chemical reactions can be accelerated by external stimuli.
• Applied mechanical forces offer a unique pathway to influence reaction kinetics.
• Directing mechanical forces effectively along the reaction coordinate is crucial for efficient acceleration.

Purpose of the Study:

• To explore the potential of applied mechanical forces in driving novel chemical reactions.
• To generalize methods for directing mechanical forces in chemical transformations.
• To envision new applications of force-controlled chemistry.

Main Methods:

• Utilizing single polymer mechanics to study force-induced cis-trans isomerization.
• Employing synthetic chemistry to attach tethers to molecular fragments.
• Directing applied forces along specific reaction coordinates.

Main Results:

• Demonstrated successful acceleration of a cis-trans isomerization reaction using precisely directed mechanical force.
• Illustrated the principle of using tethers to control force application in chemical reactions.
• Highlighted the potential for creating new chemistries through mechanical force manipulation.

Conclusions:

• Applied mechanical forces represent a powerful tool for developing new chemical reactions and materials.
• Tether-directed force application overcomes limitations of poorly aligned forces.
• Future applications include force-sensing polymers for biological environments and nanoscale electronic devices.