Femtosecond Dynamics of Excited-State Evolution in.

作者信息

Damrauer NH, Cerullo G, Yeh A, Boussie TR, Shank CV, McCusker JK

机构信息

N. H. Damrauer, T. R. Boussie, J. K. McCusker, Department of Chemistry, University of California, Berkeley, CA 94720, USA. G. Cerullo and A. Yeh, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. C. V. Shank, Department of Chemistry, University of California, Berkeley, CA 94720, and Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

出版信息

Science. 1997 Jan 3;275(5296):54-7. doi: 10.1126/science.275.5296.54.

Time-resolved absorption spectroscopy on the femtosecond time scale has been used to monitor the earliest events associated with excited-state relaxation in tris-(2,2'-bipyridine)ruthenium(II). The data reveal dynamics associated with the temporal evolution of the Franck-Condon state to the lowest energy excited state of this molecule. The process is essentially complete in approximately 300 femtoseconds after the initial excitation. This result is discussed with regard to reformulating long-held notions about excited-state relaxation, as well as its implication for the importance of non-equilibrium excited-state processes in understanding and designing molecular-based electron transfer, artificial photosynthetic, and photovoltaic assemblies in which compounds of this class are currently playing a key role.