Cited by 326Luminescence and Fluorescent MaterialsPhotochemistry and Electron Transfer StudiesOrganic Light-Emitting Diodes Research

Thermally Activated Delayed Fluorescence of Fluorescein Derivative for Time-Resolved and Confocal Fluorescence Imaging

Xiong, Xiaoqing, Song, Fengling, Wang, Jingyun, Zhang, Yukang, Xue, Yingying, Sun, Liangliang, Jiang, Na, Gao, Pan +2 more·2014·Journal of the American Chemical Society

Abstract

Compared with fluorescence imaging utilizing fluorophores whose lifetimes are in the order of nanoseconds, time-resolved fluorescence microscopy has more advantages in monitoring target fluorescence. In this work, compound DCF-MPYM, which is based on a fluorescein derivative, showed long-lived luminescence (22.11 μs in deaerated ethanol) and was used in time-resolved fluorescence imaging in living cells. Both nanosecond time-resolved transient difference absorption spectra and time-correlated single-photon counting (TCSPC) were employed to explain the long lifetime of the compound, which is rare in pure organic fluorophores without rare earth metals and heavy atoms. A mechanism of thermally activated delayed fluorescence (TADF) that considers the long wavelength fluorescence, large Stokes shift, and long-lived triplet state of DCF-MPYM was proposed. The energy gap (ΔEST) of DCF-MPYM between the singlet and triplet state was determined to be 28.36 meV by the decay rate of DF as a function of temperature. The ΔE(ST) was small enough to allow efficient intersystem crossing (ISC) and reverse ISC, leading to efficient TADF at room temperature. The straightforward synthesis of DCF-MPYM and wide availability of its starting materials contribute to the excellent potential of the compound to replace luminescent lanthanide complexes in future time-resolved imaging technologies.

Integrity signals

Registry

Crossref · 10.1021/ja502292p

Cites

66 of 66 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Xiong, X., Song, F., Wang, J., Zhang, Y., Xue, Y., Sun, L., Jiang, N., Gao, P., Tian, L., & Peng, X.
Affiliations
Dalian University of Technology (CN)
Corresponding author
Song, Fengling
Venue
Journal of the American Chemical Society
Published
2014-06-26
Volume
136
Issue
27
Pages
9590-9597
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2319458912
Cited by
326
References
66
Citations by year
2026: 7 · 2025: 21 · 2024: 29 · 2023: 25 · 2022: 32 · 2021: 40 · 2020: 40 · 2019: 41 · 2018: 35 · 2017: 20 · 2016: 19 · 2015: 12 · 2014: 5
FWCI
8.47
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Ministry of Education of the People's Republic of China
  • National Natural Science Foundation of China (21006009, 21136002, 21222605, 21376039)
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
thermally activated delayed fluorescence, fluorescein derivatives, time-resolved fluorescence imaging, confocal fluorescence imaging, long-lived luminescence, triplet state, band gap, intersystem crossing, reverse intersystem crossing, Stokes shift, time-correlated single photon counting, live-cell imaging
MeSH terms
Fluorescence, Microscopy, Fluorescence, Temperature, Time Factors, Molecular Structure, Microscopy, Confocal, Fluorescein, Molecular Imaging

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review