dc.creator Montero, Raul en_US dc.creator Conde, Alvaro Peralta en_US dc.creator Ovejas, Virginia en_US dc.creator Castano, Fernando en_US dc.creator Longarte, Asier en_US dc.date.accessioned 2012-07-09T19:21:12Z dc.date.available 2012-07-09T19:21:12Z dc.date.issued 2012 en_US dc.identifier 2012-TB-05 en_US dc.identifier.uri http://hdl.handle.net/1811/52349 dc.description Author Institution: Departamento de Quimica Fisica, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco (UPV-EHU), Ap. 644, E-48080 Bilbao, Spain en_US dc.description.abstract Pyrrole is a simple aromatic molecule with relevantchromophoric properties in biology. Although its apparent simplicity, it shows a complicated dynamics after excitation in the near part of the UV absorption spectrum, which results from the interplay between the bright $\pi\pi^*$ and the dark dissociative $\pi\sigma^*$ electronic transitions., nderline{\textbf{312}}, 1637-1640, 2006.} Herein, we present a time resolved study with ultrafast resolution on the relaxation dynamics of isolated pyrrole, after excitation in the 265-217 nm range. Two lifetimes of 19 and 15 fs, which are associated with the internal conversion from the bright $^{1}$B$_{2}$ $\pi\pi^*$ state and the propagation of the wavepacket on the $\pi\sigma^*$ state, respectively, are found in the studied energy interval. The work also explores the consequences of non resonant adiabatic excitation of the system when broadband femtosecond pulses are employed to prepare the molecule in the targeted electronic states, revealing the key implication of this type of coherent phenomena. The collected data reveal that the bright $^{1}$B$_{2}$ $\pi\pi^*$ state is adiabatically populated at excitation wavelengths far away from resonance, providing an efficient way to reach the $\pi\sigma^*$ state. The recorded transients are fit employing a coherent model that provides a comprehensive view of the dynamical processes pyrrole undergoes after excitation by ultrashort light pulses. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title FEMTOSECOND TIMESCALE EVOLUTION OF PYRROLE ELECTRONIC EXCITATION en_US dc.type Article en_US dc.type Image en_US dc.type Presentation en_US
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