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RAUL MONTERO, ALVARO PERALTA CONDE, MARTA FERNÁNDEZ-FERNÁNDEZ, FERNANDO CASTANO AND ASIER LONGARTE, Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV-EHU), Ap. 644, E-48080 Bilbao, Spain.
It is known that the photophysical properties of chromophores is decisively conditioned by the existence of
* transitions with repulsive character, in the vicinity of the characteristic bright
* absorptions. The interplay between these two types of states triggers a complex dynamics that takes place in the femto-picoseconds scale. Our group is interested in understanding the ultrafast relaxation mechanisms involving
* surfaces in a set of isolated aromatic chromofores including: aniline, indole, phenol and pyrrole. In the research carried out, the dynamical signature of the
* states has been tracked directly on the parent molecules photoexcited in a broad range of their near UV absorption specta, by multiphoton delayed ionization at several wavelengths. For the studied molecules, the work provides a detailed view on the relaxation pathways available, while permits to relate their photophysical behavior with the relative location of the
* and
* states.