Cited by 138Luminescence and Fluorescent MaterialsAdvanced Fluorescence Microscopy TechniquesMolecular Sensors and Ion Detection

Thermally Activated Delayed Fluorescence Organic Dots (TADF Odots) for Time‐Resolved and Confocal Fluorescence Imaging in Living Cells and In Vivo

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Li, Tingting, Yang, Dongliang, Zhai, Liuqing, Wang, Suiliang, Zhao, Baomin, Fu, Nina, Wang, Lianhui, Tao, Youtian +1 more·2017·Advanced Science

Abstract

The fluorophores with long‐lived fluorescent emission are highly desirable for time‐resolved fluorescence imaging (TRFI) in monitoring target fluorescence. By embedding the aggregates of a thermally activated delayed fluorescence (TADF) dye, 2,3,5,6‐tetracarbazole‐4‐cyano‐pyridine (CPy), in distearoyl‐sn‐glycero‐3‐phosphoethanolamine‐poly(ethylene glycol) (DSPE‐PEG2000) matrix, CPy‐based organic dots (CPy‐Odots) with a long fluorescence lifetime of 9.3 μs (in water at ambient condition) and high brightness (with an absolute fluorescence quantum efficiency of 38.3%) are fabricated. CPy‐Odots are employed in time‐resolved and confocal fluorescence imaging in living Hela cells and in vivo. The green emission from the CPy‐Odots is readily differentiated from the cellular autofluorescence background because of their stronger emission intensities and longer lifetimes. Unlike other widely studied DSPE‐PEG2000 encapsulated Odots which are always distributed in cytoplasm, CPy‐Odots are located mainly in plasma membrane. In addition, the application of CPy‐Odots as a bright microangiography agent for TRFI in zebrafish is also demonstrated. Much broader application of CPy‐Odots is also prospected after further surface functionalization. Given its simplicity, high fluorescence intensity, and wide availability of TADF materials, the method can be extended to develop more excellent TADF Odots for accomplishing the challenges in future bioimaging applications.

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Authors
Li, T., Yang, D., Zhai, L., Wang, S., Zhao, B., Fu, N., Wang, L., Tao, Y., & Huang, W.
Affiliations
  • Nanjing University of Posts and Telecommunications (CN)
  • Nanjing Tech University (CN)
Corresponding author
  • Fu, Nina
  • Wang, Lianhui
  • Huang, Wei
Venue
Advanced Science
Publisher
Wiley
Published
2017-01
Volume
4
Issue
4
Pages
1600166-1600166
ISSN
2198-3844 (ISSN-L)
OpenAlex
W2563368062
Cited by
138
References
92
Citations by year
2026: 8 · 2025: 11 · 2024: 16 · 2023: 13 · 2022: 20 · 2021: 18 · 2020: 24 · 2019: 15 · 2018: 10 · 2017: 3
FWCI
6.00
Type
journal article
Language
en
Open access
Locations
  • Advanced Science (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (51103074, 51203077, 21204038, 81273409, 61474062, 61136003)
  • Natural Science Foundation of Jiangsu Province (BK2012438, BM2012010)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Advanced Fluorescence Microscopy Techniques
  • Physical Sciences › Chemistry › Spectroscopy › Molecular Sensors and Ion Detection
Keywords
thermally activated delayed fluorescence, DSPE-PEG2000, time-resolved fluorescence imaging, confocal fluorescence imaging, live-cell imaging, in vivo imaging, microangiography, plasma membrane localization, zebrafish, fluorescence lifetime, autofluorescence

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