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Updated: Mar 16, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Ground-State Chemical Reactivity under Vibrational Coupling to the Vacuum Electromagnetic Field
Anoop Thomas1, Jino George1, Atef Shalabney2
1University of Strasbourg, CNRS, ISIS & icFRC, 8 allée G. Monge, 67000, Strasbourg, France.
Chemical reactions can be controlled by vibrational strong coupling, slowing down alkynylsilane deprotection. This method modifies reaction pathways and offers insights into reaction mechanisms.
Area of Science:
- Chemical kinetics
- Physical chemistry
- Spectroscopy
Background:
- Vibrational strong coupling (VSC) involves interactions between molecular vibrations and cavity photons.
- Understanding how VSC affects chemical reaction rates and mechanisms is crucial for chemical control.
Purpose of the Study:
- To investigate the effect of VSC on the ground-state deprotection of alkynylsilane.
- To explore the relationship between Rabi splitting energy and reaction rate changes.
- To analyze the modification of reaction mechanisms under VSC.
Main Methods:
- Utilizing a resonant infrared microfluidic cavity for VSC.
- Studying the deprotection of alkynylsilane under strong coupling conditions.
- Analyzing reaction kinetics and product distribution using Gas Chromatography-Mass Spectrometry (GC-MS).
- Conducting temperature-dependent studies to determine activation parameters.
Main Results:
- Reaction rates decreased by up to 5.5 times under VSC.
- The extent of rate change correlated with Rabi splitting energy.
- GC-MS confirmed kinetic observations.
- Temperature dependence indicated a shift from associative to dissociative transition states.
Conclusions:
- VSC significantly modifies chemical landscapes and reaction mechanisms.
- VSC offers a novel approach for controlling chemical reactions.
- This study provides fundamental insights into reaction dynamics under strong coupling.
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