Molecular conformation and organic photochemistry: time-resolved photoionization studies

Rasmus Brogaard's thesis digs into the fundamental issue of how the shape of a molecule relates to its photochemical reactivity. This relation is drastically different from that of ground-state chemistry, since lifetimes of excited states are often comparable to or even shorter than the time scales of conformational changes. Combining theoretical and experimental efforts in femto-secondtime-resolved photoionization Rasmus Brogaard finds that a requirement for anefficient photochemical reaction is the prearrangement of the constituents ina reactive conformation. .Furthermore, he is able to show that by exploiting a strong ionic interaction between two chromophores, a coherent molecular motion can be induced and probed in real-time. This way of using bichromophoric interactions provides a promising strategy for future research on conformationaldynamics. INDICE: Aspects and investigation of photochemical dynamics.- A time-resolved probing method: photoionization.- Simulation of time-resolved photoionization signals.- Simulation: the Norrish type-I reaction in acetone.- Experimental setups.- Paracyclophanes I: [2+2]cycloaddition of ethylenes.- Paracyclophanes II: The Paternò-Büchi reaction.- Probing structural dynamics by interaction between chromophores.

• ISBN: 978-3-642-29380-1
• Editorial: Springer
• Encuadernacion: Cartoné
• Fecha Publicación: 30/06/2012
• Nº Volúmenes: 1
• Idioma: Inglés