Chemistry Faculty Publications
Document Type
Article
Abstract
The photoinduced excited-state processes in 1,1'-diethyl-2,2'-cyanine iodine are investigated using femtosecond time-resolved pump-probe spectroscopy. Using a broad range of probe wavelengths, the relaxation of the initially prepared excited-state wavepacket can be followed down to the sink region. The data directly visualize the directed downhill motion along the torsional reaction coordinate and suggest a barrierless excited-state isomerization in the short chain cyanine dye. Additionally, ultrafast ground-state hole and excited-state hole replica broadening is observed. While the narrow excited-state wavepacket broadens during pump-probe overlap, the ground-state hole burning dynamics takes place on a significantly longer time-scale. The experiment reported can be considered as a direct monitoring of the shape and the position of the photoprepared wavepacket on the excited-state potential energy surface.
Copyright Statement
Publisher PDF
Repository Citation
Dietzek, Benjamin; Yartsev, Arkady; and Tarnovsky, Alexander N., "Watching Ultrafast Barrierless Excited-state Isomerization Of Pseudocyanine In Real Time" (2007). Chemistry Faculty Publications. 58.
https://scholarworks.bgsu.edu/chem_pub/58
Publication Date
5-2007
Publication Title
Journal Of Physical Chemistry B
DOI
https://doi.org/10.1021/jp066471a
Start Page No.
4520
End Page No.
4526