Attosecond dynamics of photoionized organic molecules

• Autores: Jorge Luis Delgado Guerrero
• Directores de la Tesis: Alicia Palacios Cañas (dir. tes.), Fernando Martín García (dir. tes.)
• Lectura: En la Universidad Autónoma de Madrid ( España ) en 2024
• Idioma: inglés
• Número de páginas: 155
• Títulos paralelos:
  • Dinámica de attosegundos en moléculas orgánicas fotoionizadas
• Tribunal Calificador de la Tesis: Rebeca de Nalda Mínguez (presid.), Jesús González Vázquez (secret.), Rocío Borrego Varillas (voc.), Piero Decleva (voc.), Juan José Omiste Romero (voc.)
• Programa de doctorado: Programa de Doctorado en Química Teórica y Modelización Computacional/Theoretical Chemistry and Computational Modelling por la Universidad Autónoma de Madrid; la Universidad Complutense de Madrid; la Universidad de Barcelona; la Universidad de Cantabria; la Universidad de Extremadura; la Universidad de las Illes Balears; la Universidad de Murcia; la Universidad de Oviedo; la Universidad de Sevilla; la Universidad de Vigo; la Universidad del País Vasco/Euskal Herriko Unibertsitatea; la Universida
• Materias:
  • Química
• Enlaces
  • Tesis en acceso abierto en: Biblos-e Archivo
• Resumen

  • The toolbox of molecular spectroscopic techniques has rapidly developed in the past cen- tury. A full characterization of a molecule (energy, geometry and configurations, transition states, reactivity, cromophore sites, etc) is nowadays possible through their interaction with electromagnetic radiation. The emergence of laser technology in the 50s represented a crucial moment for molecular spectroscopy, with the availability of coherent light sources that soon led to the realization of pioneer time-resolved experiments able to monitor rota- tional (picosecond time scale), and vibrational motions (femtosecond scale) of atomic nuclei in molecules. In 2001, the generation of first attosecond pulses gave access to electronic motion at its natural time scale, and similar pump-probe schemes previously used in fem- tochemistry where implemented to now capture in real time electron dynamics in atoms and molecules. The frequency of these pulses lies in the XUV (and above) region of the electromagnetic spectrum, which thus induces ionization of the outer, and even some inner, energy levels in molecules.

    This PhD work sheds new light on the ultrafast electron dynamics in small organic molecules, highlighting the most important features that should be properly ac- counted for in distinct attosecond spectroscopic approaches depending on the experimental conditions (e.g., interchannel couplings between cationic states or multiphoton quantum interferences when IR are employed, molecular and geometry dependencies in the probing signal for standard UV/UV or UV/XUV experiments, or probe specificity when probing the XUV-pumped dynamics associated to the coupled electron-nuclear motion upon the probe step).