Cited by 36Luminescence and Fluorescent MaterialsNanoplatforms for cancer theranosticsPhotodynamic Therapy Research Studies

The Balance Effect of π–π Electronic Coupling on NIR‐II Emission and Photodynamic Properties of Highly Hydrophobic Conjugated Photosensitizers

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Zhu, Yulin, Lai, Hanjian, Gu, Ying, Wei, Zixiang, Chen, Lin, Lai, Xue, Han, Liang, Tan, Pu +4 more·2024·Advanced Science

Abstract

Deep NIR organic phototheranostic molecules generally have large π‐conjugation structures and show highly hydrophobic properties, thus, forming strong π–π stacking in the aqueous medium, which will affect the phototheranostic performance. Herein, an end‐group strategy is developed to lift the performance of NIR‐II emitting photosensitizers. Extensive characterizations reveal that the hydrogen‐bonding interactions of the hydroxyl end group can induce a more intense π–π electronic coupling than the chlorination‐mediated intermolecular forces. The results disclose that π–π stacking will lower fluorescence quantum yield but significantly benefit the photodynamic therapy (PDT) efficiency. Accordingly, an asymmetrically substituted derivative (BTIC‐δ OH‐2Cl) is developed, which shows balanced phototheranostic properties with excellent PDT efficiency (14.6 folds of ICG) and high NIR‐II fluorescence yield (2.27%). It proves the validity of the end‐group strategy on controlling the π–π interactions and rational tuning the performance of NIR‐II organic phototheranostic agents.

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Authors
Zhu, Y., Lai, H., Gu, Y., Wei, Z., Chen, L., Lai, X., Han, L., Tan, P., Pu, M., Xiao, F., He, F., & Tian, L.
Affiliations
  • Harbin Institute of Technology (CN)
  • Southern University of Science and Technology (CN)
Corresponding author
  • He, Feng
  • Tian, Leilei
Venue
Advanced Science
Publisher
Wiley
Published
2023-12-28
Volume
11
Issue
6
Pages
e2307569-e2307569
ISSN
2198-3844 (ISSN-L)
OpenAlex
W4390410414
Cited by
36
References
43
Citations by year
2026: 9 · 2025: 18 · 2024: 8 · 2023: 1
FWCI
2.65
Type
journal article
Language
en
Open access
Locations
  • Advanced Science (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (51973089, 22225504, 21975115)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
  • Physical Sciences › Engineering › Biomedical Engineering › Nanoplatforms for cancer theranostics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
Keywords
NIR-II fluorescence, photodynamic therapy, photosensitizers, π-π stacking, end-group engineering, hydrogen bonding, chlorination, fluorescence quantum yield, phototheranostics

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