Vibronic and excitonic dynamics in perylenediimide dimers and tetramer

Ivo H.M. Van Stokkum, Chanelle C. Jumper, Tia S. Lee, Mykhaylo Myahkostupov, Felix N. Castellano, Gregory D. Scholes

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Broad-band pump-probe spectroscopy combined with global and target analysis is employed to study the vibronic and excitonic dynamics of two dimers and a tetramer of perylenediimides. A simultaneous analysis is developed for two systems that have been measured in the same conditions. This enhances the resolvability of the vibronic and excitonic dynamics of the systems, and the solvent contributions that are common in the experiments. We resolve two oscillations of 1399 cm-1 or 311 cm-1 damped with ≈30/ps involved in vibrational relaxation and two more oscillations of 537 cm-1 or 136 cm-1 damped with ≈3/ps. A relaxation process with a rate of 2.1/ps-3.2/ps that is positively correlated with the excitonic coupling was discovered in all three model systems, attributed to annihilation of the one but lowest exciton state.

Original languageEnglish (US)
Article number224101
JournalJournal of Chemical Physics
Issue number22
StatePublished - Dec 14 2020

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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