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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Analysis of polyatomic molecules using high resolution coherent two-dimensional spectroscopy: Application to nitrogen
Peter C Chen1, Kamilah Mitchell
1Chemistry Department, Spelman College, 350 Spelman Lane, Atlanta, Georgia 30314, USA. pchen@spelman.edu
The Journal of Chemical Physics
|November 26, 2008
Summary
High-resolution coherent 2D spectroscopy resolves complex molecular spectra. This technique reveals X-shaped patterns in nitrogen dioxide (NO2) spectra, aiding rotational analysis of congested regions.
Area of Science:
- Molecular Spectroscopy
- Quantum Chemistry
- Atmospheric Chemistry
Background:
- Nitrogen dioxide (NO2) possesses a highly congested spectrum, making analysis difficult.
- NO2 is a significant component of photochemical smog, necessitating detailed spectral understanding.
Purpose of the Study:
- To apply high-resolution coherent 2D spectroscopy to analyze the complex spectrum of NO2.
- To demonstrate peak-sorting and peak-coupling for rotational analysis in congested spectral regions.
Main Methods:
- Utilizing coherent two-dimensional (2D) spectroscopy for high-resolution spectral analysis.
- Applying peak-sorting algorithms to identify spectral patterns.
- Employing peak coupling for rotational analysis of vibronic origins.
Main Results:
- Coherent 2D NO2 spectra exhibit a network of X-shaped patterns indicating vibronic origins.
- Peak sorting effectively organizes spectral data, revealing underlying structures.
- Peak coupling facilitates rotational analysis in previously intractable spectral regions.
Conclusions:
- Coherent 2D spectroscopy offers a powerful method for resolving severe rotational congestion in molecular spectra.
- The identified X-shaped patterns provide a novel approach to analyzing NO2 spectra.
- This technique advances the study of atmospheric molecules like NO2.
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