Direct observation of a charge-transfer state preceding high-yield singlet fission in terrylenediimide thin films

Eric A. Margulies, Jenna L. Logsdon, Claire E. Miller, Lin Ma, Ethan Simonoff, Ryan M. Young, George C Schatz, Michael R Wasielewski

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Singlet exciton fission (SF) in organic chromophore assemblies results in the conversion of one singlet exciton (S1) into two triplet excitons (T1), provided that the overall process is exoergic, i.e., E(S1) > 2E(T1). We report on SF in thin polycrystalline films of two terrylene-3, 4:ll, 12-bis(dicarboximide) (TDI) derivatives 1 and 2, which crystallize into two distinct π-stacked structures. Femtosecond transient absorption spectroscopy (fsTA) reveals a charge-transfer state preceding a 190% T, yield in films of 1, where the π-stacked TDI molecules are rotated by 23° along an axis perpendicular to their n systems. In contrast, when the TDI molecules are slip-stacked along their N-N axes in films of 2, fsTA shows excimer formation, followed by a 50% T1 yield.

Original languageEnglish
Pages (from-to)663-671
Number of pages9
JournalJournal of the American Chemical Society
Volume139
Issue number2
DOIs
Publication statusPublished - Jan 18 2017

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Excitons
Charge transfer
Observation
Thin films
Absorption spectroscopy
Spectrum Analysis
Molecules
Chromophores
Derivatives
LDS 751

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Direct observation of a charge-transfer state preceding high-yield singlet fission in terrylenediimide thin films. / Margulies, Eric A.; Logsdon, Jenna L.; Miller, Claire E.; Ma, Lin; Simonoff, Ethan; Young, Ryan M.; Schatz, George C; Wasielewski, Michael R.

In: Journal of the American Chemical Society, Vol. 139, No. 2, 18.01.2017, p. 663-671.

Research output: Contribution to journalArticle

Margulies, Eric A. ; Logsdon, Jenna L. ; Miller, Claire E. ; Ma, Lin ; Simonoff, Ethan ; Young, Ryan M. ; Schatz, George C ; Wasielewski, Michael R. / Direct observation of a charge-transfer state preceding high-yield singlet fission in terrylenediimide thin films. In: Journal of the American Chemical Society. 2017 ; Vol. 139, No. 2. pp. 663-671.
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AU - Young, Ryan M.

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