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Delayed Relaxation of Highly Excited Cationic States in Naphthalene

Abstract : Rapid energy transfer from electronic to nuclear degrees of freedom underlies many biological processes and astrophysical observations. The efficiency of this energy transfer depends strongly on the complex interplay between electronic and nuclear motions. In this study, we report two-color pump–probe experiments that probe the relaxation dynamics of highly excited cationic states of naphthalene, a prototypical polycyclic aromatic hydrocarbon molecule, which are produced using wavelength-selected, ultrashort extreme ultraviolet pulses. Surprisingly, the relaxation lifetimes increase with the cationic excitation energy. We postulate that the observed effect is the result of a population trapping that leads to delayed relaxation.
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https://hal-univ-lyon1.archives-ouvertes.fr/hal-02285862
Contributor : Marie-Gabrielle Chautard <>
Submitted on : Friday, September 13, 2019 - 10:47:21 AM
Last modification on : Thursday, October 15, 2020 - 8:54:05 AM

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G. Reitsma, J. Hummert, J. Dura, Vincent Loriot, M. J. J. Vrakking, et al.. Delayed Relaxation of Highly Excited Cationic States in Naphthalene. Journal of Physical Chemistry A, American Chemical Society, 2019, 123 (14), pp.3068-3073. ⟨10.1021/acs.jpca.8b10444⟩. ⟨hal-02285862⟩

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