Photophysics of Organometallics

0341548 - ÚFCH JH 2011 RIV DE eng M - Monography Chapter
Vlček, Antonín
Ultrafast Excited-State Processes in Re(I) Carbonyl-Diimine Complexes: From Excitation to Photochemistry.
Photophysics of Organometallics. 1. Heidelberg: Springer Berlin, 2010 - (Lees, A.), s. 73-114. Topics in Organometallic Chemistry, 29. ISBN 978-3-642-04728-2
R&D Projects: GA MŠMT 1P05OC068; GA MŠMT OC09043
Institutional research plan: CEZ:AV0Z40400503
Keywords : rhenium * carbonyl * diimine
Subject RIV: CF - Physical ; Theoretical Chemistry

Rhenium(I) carbonyl-diimines are chemically robust and synthetically flexible photo- and redox active compounds that can be incorporated into supramolecular systems, polymers or biomolecules. They can be used as efficient and fast photosensitizers. In this chapter, we will follow excited-state evolution of ReI complexes from the instant of photon absorption through intersystem crossing, relaxation of “hot” triplet states, to their decay either to the ground state or to photoproducts. Out of many decay pathways, we concentrate on nonradiative decay following the energy gap law, excited-state electron- and energy transfer and ligand isomerization. Characterization of the lowest excited state by ultrafast IR spectroscopy and DFT calculations are discussed in detail. It is shown that excited-state properties are much influenced by mixing of Re(CO)3→diimine, L→diimine CT and intraligand ππ* excitations.
Permanent Link: http://hdl.handle.net/11104/0184490