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Updated: Aug 3, 2026

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
Time domain investigation on vibrational dephasing and spectral diffusion in CO-doped solid N2
1Laboratoire de Photophysique Moleculaire du CNRS, Universite Paris-Sud, Batiment 210, 91405 Orsay Cedex, France.
Infrared spectroscopy reveals exceptionally long vibrational dephasing times for carbon monoxide (CO) in solid nitrogen at low temperatures. Different energy transfer mechanisms are observed based on CO concentration.
Area of Science:
- Physical Chemistry
- Spectroscopy
- Condensed Matter Physics
Background:
- Understanding molecular dynamics in solid matrices is crucial for various applications.
- Carbon monoxide (CO) in solid nitrogen provides a model system for studying vibrational energy transfer.
Purpose of the Study:
- To investigate the vibrational dephasing dynamics of CO in solid nitrogen.
- To explore the influence of CO concentration on energy transfer mechanisms.
Main Methods:
- Utilized infrared picosecond accumulated photon echo experiments.
- Employed the Orsay Free Electron Laser for precise excitation of the CO v=0→v=1 transition.
Main Results:
- Observed exceptionally long vibrational dephasing times (T2 ≥ 120 ns) at low temperatures.
- Detected spectral diffusion, indicating concentration-dependent energy transfer pathways.
Conclusions:
- The long dephasing time suggests efficient vibrational energy retention in the CO-solid nitrogen system.
- Energy transfer mechanisms vary with CO concentration, highlighting the importance of intermolecular interactions.
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