Cited by 43Luminescence and Fluorescent MaterialsNanoplatforms for cancer theranosticsLuminescence Properties of Advanced Materials

BOIMPY Scaffold: Accessing Ultrahigh Molar Extinction Coefficient AIEgen for SWIR Imaging‐Guided Photothermal Cancer Ablation

Yang, Mingwang, Ou, Xinwen, Zhang, Jianyu, Sun, Jianwei, Kwok, Ryan T. K., Lam, Jacky W. Y., Fan, Jiangli, Tang, Ben Zhong·2025·Advanced Functional Materials

Abstract

Despite the extensive reporting of versatile aggregation‐induced emission luminogens (AIEgens), boosting their molar extinction coefficient (MEC, ε ≈ 10 3–10 4 M−1 cm−1) remains a formidable challenge, which poses a significant obstacle to achieving the ceiling of their output performance. In this work, an “aggrandizing absorption reservoir” approach is proposed to designing AIEgens with remarkable photons‐harvesting ability, ultimately enlarging its output performance in terms of short‐wave infrared (SWIR, 900–1700 nm) emission and photothermal effect. For the first time, the (bis‐(borondifluoride)‐8‐imidazodipyrromethene) (BOIMPY) unit, which provides sufficient rigidity and strong electron‐withdrawing ability by employing benzimidazole as a bridging ligand binding two BF 2 units, is utilized to fabricate novel AIEgen (TPEB) that exhibits an ultrahigh MEC up to 1.29 × 10 5 M−1 cm−1 at 828 nm. To the best of knowledge, this is the highest MEC reported among AIEgens with near‐infrared absorption. Thanks to its remarkable photon‐harvesting ability, TPEB exhibits strong fluorescence in the SWIR region and a good photothermal effect. The as‐prepared TPEB NPs are successfully applied for SWIR imaging‐guided photothermal antitumor therapy. The proposed “aggrandizing absorption reservoir” approach provides a novel guideline for designing versatile AIEgens for biomedical applications.

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Crossref · 10.1002/adfm.202411838

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  • TPEB and TPAB showed high molar extinction coefficients and strong quantum yields.

    “The resulting dyes, TPEB and TPAB, showed high molar extinction coefficients and strong quantum yields”
  • Tang et al. employed AIE to construct BOIMPY-based luminogens.

    “Tang et al. employed AIE to construct BOIMPY-based luminogens (Fig. 8a)166.”
  • In BOIMPY-based luminogens, the BOIMPY unit acted as a rigid, strongly electron-withdrawing acceptor, while tetraphenylethylene and triphenylamine served as donors and intramolecular rotors.

    “The bis-(borondifluoride)-8-imidazodipyrromethene (BOIMPY) unit acted as a rigid, strongly electron-withdrawing acceptor, while tetraphenylethylene and triphenylamine served as donors and intramolecular rotors.”
  • TPEB nanoparticles achieved NIR-II imaging-guided photothermal ablation.

    “with TPEB nanoparticles achieving NIR-II imaging-guided photothermal ablation.”
  • The BOIMPY-based design suppressed π-π aggregation and enabled efficient NIR-II emission.

    “This design suppressed π–π aggregation and enabled efficient NIR-II emission.”

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Authors
Yang, M., Ou, X., Zhang, J., Sun, J., Kwok, R. T. K., Lam, J. W. Y., Fan, J., & Tang, B. Z.
Affiliations
  • Hong Kong University of Science and Technology (HK)
  • Dalian University of Technology (CN)
  • Chinese University of Hong Kong (HK)
Corresponding author
  • Lam, Jacky W. Y.
  • Fan, Jiangli
  • Tang, Ben Zhong
Venue
Advanced Functional Materials
Publisher
Wiley
Published
2024-09-19
Volume
35
Issue
1
ISSN
  • 1616-301X (ISSN-L)
  • 1616-3028
OpenAlex
W4402651004
Cited by
42
References
43
Citations by year
2026: 15 · 2025: 26 · 2024: 1
FWCI
4.09
Type
journal article
Language
en
Open access
closed
Locations
  • Advanced Functional Materials (publishedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Funders
  • Innovation and Technology Commission (ITC‐CNERC14SC01, ITCPD/17‐9)
  • National Natural Science Foundation of China (21925802, 22338005)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
  • Physical Sciences › Engineering › Biomedical Engineering › Nanoplatforms for cancer theranostics
  • Physical Sciences › Materials Science › Materials Chemistry › Luminescence Properties of Advanced Materials
Keywords
aggregation-induced emission, AIEgens, molar absorptivity, short-wave infrared imaging, boron difluoride, near-infrared fluorescence, photothermal nanoparticles, cancer therapy, electron-withdrawing substituents

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