Transient Two-Dimensional Infrared Spectroscopy in a Vibrational Ladder

Vincent Kemlin 1 Adeline Bonvalet 1 Louis Daniault 1 Manuel Joffre 1
1 LOB - Laboratoire d'Optique et Biosciences
Abstract : We report on transient 2D Fourier transform infrared spectroscopy (2DIR) after vibrational ladder climbing induced in the CO-moiety longitudinal stretch of carboxyhemoglobin. The population distribution, spreading up to seven vibrational levels, results in a nonequilibrium 2DIR spectrum evidencing a large number of peaks that can be easily attributed to individual transitions thanks to the anharmonicity of the vibrational potential. We discuss the physical origin of the observed peaks as well as the qualitative behavior of the subsequent dynamics governed by population relaxation in the vibrational ladder.
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Submitted on : Thursday, December 22, 2016 - 3:01:56 PM
Last modification on : Thursday, September 26, 2019 - 10:58:03 AM

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Vincent Kemlin, Adeline Bonvalet, Louis Daniault, Manuel Joffre. Transient Two-Dimensional Infrared Spectroscopy in a Vibrational Ladder. Journal of Physical Chemistry Letters, American Chemical Society, 2016, 7 (17), pp.3377 - 3382. ⟨10.1021/acs.jpclett.6b01535⟩. ⟨hal-01421556⟩

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