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Supramolecular Engineering Cascade Regulates NIR-II J-aggregates to Improve Photodynamic Therapy

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Journal Chem Sci
Specialty Chemistry
Date 2024 Jul 26
PMID 39055007
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Abstract

Rational design of small organic molecule-based NIR-II photosensitizers (PSs) with high singlet oxygen quantum yield in aqueous solution for deep tissue imaging and cancer therapy still presents challenges. Herein, we devised a general synthesis strategy to obtain six NIR-II region PSs with tunable aggregation states by adjusting the steric effect, and all PSs possess longer NIR absorption/emission wavelengths with tails extending beyond 1200 nm. Notably, ATX-6 possessed a singlet oxygen quantum yield of 38.2% and exhibited concentration-dependent J-aggregation properties upon self-assembly in an aqueous solution. What's more, supramolecular engineering with DSPE-PEG further enhanced its degree of J-aggregation, which was attributed to the dimer-excited reduction of the energy levels of the single-linear/triple-linear states and the facilitation of intersystem crossover processes. In addition, ATX-6 NPs showed superior photodynamic therapy effects and great potential in high-contrast bioimaging of the NIR-II region. These results provide valuable insights for achieving the diagnostic and therapeutic integration of tumors.

References
1.
Tang Z, Liu Y, He M, Bu W . Chemodynamic Therapy: Tumour Microenvironment-Mediated Fenton and Fenton-like Reactions. Angew Chem Int Ed Engl. 2018; 58(4):946-956. DOI: 10.1002/anie.201805664. View

2.
Tian Y, Yin D, Yan L . J-aggregation strategy of organic dyes for near-infrared bioimaging and fluorescent image-guided phototherapy. Wiley Interdiscip Rev Nanomed Nanobiotechnol. 2022; 15(1):e1831. DOI: 10.1002/wnan.1831. View

3.
Zhao H, Chen K, Liu M, Wang Z, Li L, Li M . A Mitochondria-Targeted NIR-II Molecule Fluorophore for Precise Cancer Phototheranostics. J Med Chem. 2023; 67(1):467-478. DOI: 10.1021/acs.jmedchem.3c01677. View

4.
Wen K, Tan H, Peng Q, Chen H, Ma H, Wang L . Achieving Efficient NIR-II Type-I Photosensitizers for Photodynamic/Photothermal Therapy upon Regulating Chalcogen Elements. Adv Mater. 2021; 34(7):e2108146. DOI: 10.1002/adma.202108146. View

5.
Li S, Fu L, Xiao X, Geng H, Liao Q, Liao Y . Regulation of Thermally Activated Delayed Fluorescence to Room-Temperature Phosphorescent Emission Channels by Controlling the Excited-States Dynamics via J- and H-Aggregation. Angew Chem Int Ed Engl. 2021; 60(33):18059-18064. DOI: 10.1002/anie.202103192. View