A pulse sequence for directly measuring the anharmonicities of coupled vibrations: Two-quantum two-dimensional infrared spectroscopy
EC Fulmer, P Mukherjee, AT Krummel… - The Journal of chemical …, 2004 - pubs.aip.org
We have experimentally demonstrated a pulse sequence for the acquisition of heterodyned
two-dimensional infrared (2D IR) spectra that correlates the overtone and combination
bands to the fundamental frequencies. The spectra are generated by Fourier transforming
the time domain signal that is allowed to evolve during one-and two-quantum coherence
times. In this manner, the overtone and combination bands appear along the two-quantum
axis, resulting in a direct determination of the diagonal and off-diagonal anharmonicities. To …
two-dimensional infrared (2D IR) spectra that correlates the overtone and combination
bands to the fundamental frequencies. The spectra are generated by Fourier transforming
the time domain signal that is allowed to evolve during one-and two-quantum coherence
times. In this manner, the overtone and combination bands appear along the two-quantum
axis, resulting in a direct determination of the diagonal and off-diagonal anharmonicities. To …
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