Isolating Pure Donor and Acceptor Signals by Polarization-Controlled Transient Absorption Spectroscopy

Yi Xu, Lars Mewes, Erling Thyrhaug, Vladislav Sláma, František Šanda, Heinz Langhals, Jürgen Hauer

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The optical spectra of molecules are often highly congested, inhibiting definite assignment of features and dynamics. In this work, we demonstrate and apply a polarization-based strategy for the decomposition of time-resolved optical spectra to analyze the electronic structure and energy transfer in a molecular donor-acceptor (D-A) dyad. We choose a dyad with orthogonal transition dipole moments for D and A and high fluorescence quantum yield to show that polarization-controlled ultrafast transient absorption spectra can isolate the pure D and A parts of the total signal. This provides a strategy to greatly reduce spectral congestion in complex systems and thus allows for detailed studies of electronic structure and electronic energy transfer.

Original languageEnglish
Pages (from-to)5390-5396
Number of pages7
JournalJournal of Physical Chemistry Letters
Volume14
Issue number23
DOIs
StatePublished - 15 Jun 2023

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