Cited by 54Luminescence and Fluorescent MaterialsPhotochemistry and Electron Transfer StudiesOrganic Light-Emitting Diodes Research

Double J-Coupling Strategy for Near Infrared Emitters

Shen, Chia-An, Stolte, Matthias, Kim, Jin Hong, Rausch, Anja, Würthner, Frank·2021·Journal of the American Chemical Society

Abstract

Fluorophores emitting in the near-infrared (NIR) are highly desired for various applications, but increasing nonradiative rates cause severe fluorescence quenching for wavelengths beyond 800 nm. Here, a bis(squaraine) dye is reported that bears two NIR dyes in a head-to-tail chromophore arrangement. This arrangement leads to intra molecular J-type exciton coupling, resulting in an absorption maximum at 961 nm and a fluorescence peak at 971 nm with a quantum yield of 0.33% in chloroform. In less polar toluene, the bis(squaraine) self-assembles into nanofibers, affording another bathochromic shift with an absorption maximum at 1095 nm and a fluorescence peak at 1116 nm originating from inter molecular J-type coupling.

Integrity signals

Registry

Crossref · 10.1021/jacs.1c05934

Cites

36 of 36 references verified0 citation errors · 0 not checkable

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Authors
Shen, C.-A., Stolte, M., Kim, J. H., Rausch, A., & Würthner, F.
Affiliations
University of Würzburg (DE)
Corresponding author
Würthner, Frank
Venue
Journal of the American Chemical Society
Published
2021-07-29
Volume
143
Issue
31
Pages
11946-11950
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W3184439326
Cited by
54
References
36
Citations by year
2026: 8 · 2025: 12 · 2024: 9 · 2023: 14 · 2022: 9 · 2021: 2
FWCI
2.58
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
Funders
Bavarian State Ministry for Science and the Arts (Solar Technologies Go Hybrid)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
Keywords
near-infrared emitters, fluorescence quenching, self-assembly, nanofibers, bathochromic shift, quantum yield, nonradiative decay

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