Abstract
We establish coherent triggered-exchange two-dimensional (TE2D) electronic spectroscopy as an expansion of pump-repump-probe transient absorption spectroscopy and uniquely elucidate the role of higher-lying electronic states in ultrafast photochemistry. As an example, this is demonstrated for a molecular switch present in two ring-open conformations. The formation of a new species—the radical cation—is observed and its precursor state is identified via TE2D.
- Received 7 November 2012
DOI:https://doi.org/10.1103/PhysRevLett.110.148305
© 2013 American Physical Society
Synopsis
Following the Footsteps of a Chemical Reaction
Published 4 April 2013
Femtosecond laser spectroscopy can identify otherwise inaccessible precursors in photoinduced chemical reactions.
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