Peak separation and sorting by coherent 2D resonance Raman spectroscopy.
The ability to separate and sort peaks is explored using a new coherent two-dimensional form of resonance Raman spectroscopy. This experimental technique distributes normally congested rotational-vibrational peaks along a series of curved lines according to vibrational sequence, rotational quantum number, and selection rule. Each line consists of rotational-vibrational peaks that have the same vibrational sequence and the same value for DeltaJ, distributed in order by rotational quantum number. For diatomic molecules, these lines originate from points where they initially travel in opposite or orthogonal directions in two-dimensional space, which helps facilitate the separation between lines. Simulations and experimental results on C2 in a flame confirm the ability to separate and sort these normally congested rotational-vibrational peaks. This method appears to provide a solution to the long-standing problems of spectral congestion and disorder in gas-phase electronic spectra.
Chen
Peter C
PC
Chemistry Department, Spelman College, 350 Spelman Lane, Atlanta, Georgia 30314, USA. pchen@spelman.edu
Joyner
Candace C
CC
D003198:Computer Simulation; D013059:Spectrum Analysis, Raman / Q000379:methods*