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  • Title: Photodissociation of thymine.
    Author: Schneider M, Maksimenka R, Buback FJ, Kitsopoulos T, Lago LR, Fischer I.
    Journal: Phys Chem Chem Phys; 2006 Jul 07; 8(25):3017-21. PubMed ID: 16880915.
    Abstract:
    We discuss the photochemistry and photodissociation dynamics of thymine as revealed by two-colour photofragment Doppler spectroscopy and by one-colour slice imaging. Thymine is optically excited into the pipi* state, known to deactivate quickly. The H atom photofragment spectra are dominated by two-photon excitation processes with subsequent statistical dissociation. This can be explained by absorption of a second photon from a long-lived dark state to a highly excited state that quickly deactivates to the electronic ground state. No evidence was found for an important role of the pisigma* excited state identified in adenine and many other heterocyclic molecules.
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