Solvent-Modulated Charge-Transfer Resonance Enhancement in the Excimer State of a Bay-Substituted Perylene Bisimide Cyclophane

Woojae Kim, Agnieszka Nowak-Król, Yongseok Hong, Felix Schlosser, Frank Würthner, Dongho Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Excimer, a configurational mixing between Frenkel exciton and charge-transfer resonance states, is typically regarded as a trap state that hinders desired energy or charge-transfer processes in artificial molecular assemblies. However, in recent days, the excimer has received much attention as a functional intermediate in the excited-state dynamics such as singlet fission or charge-separation processes. In this work, we show that the relative contribution to charge-transfer resonance of the excimer state in a bay-substituted perylene bisimide dimer cyclophane can be modulated by dielectric properties of the solvents employed. Solvent-dependent time-resolved fluorescence and absorption measurements reveal that an enhancement of charge-transfer resonance in the excimer state is reflected by incomplete symmetry-breaking charge-separation processes from the structurally relaxed excimer state by means of dipolar solvation processes in the high dielectric environment.

Original languageEnglish
Pages (from-to)1919-1927
Number of pages9
JournalJournal of Physical Chemistry Letters
Volume10
Issue number8
DOIs
Publication statusPublished - 2019 Apr 18

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excimers
Charge transfer
charge transfer
augmentation
polarization (charge separation)
Solvation
Excited states
Excitons
Dimers
Dielectric properties
Energy transfer
Fluorescence
assemblies
fission
solvation
dielectric properties
broken symmetry
energy transfer
dimers
excitons

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physical and Theoretical Chemistry

Cite this

Kim, Woojae ; Nowak-Król, Agnieszka ; Hong, Yongseok ; Schlosser, Felix ; Würthner, Frank ; Kim, Dongho. / Solvent-Modulated Charge-Transfer Resonance Enhancement in the Excimer State of a Bay-Substituted Perylene Bisimide Cyclophane. In: Journal of Physical Chemistry Letters. 2019 ; Vol. 10, No. 8. pp. 1919-1927.
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Solvent-Modulated Charge-Transfer Resonance Enhancement in the Excimer State of a Bay-Substituted Perylene Bisimide Cyclophane. / Kim, Woojae; Nowak-Król, Agnieszka; Hong, Yongseok; Schlosser, Felix; Würthner, Frank; Kim, Dongho.

In: Journal of Physical Chemistry Letters, Vol. 10, No. 8, 18.04.2019, p. 1919-1927.

Research output: Contribution to journalArticle

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