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Advanced Science

Advanced Science

IF: 14.3
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Triplet Electron Exchange in Carbon Nanodots‐assisted Long‐persistent near‐infrared Chemiluminescence for Oncology Synergistic Imaging and Therapy

Published:11 December 2024 DOI: 10.1002/advs.202411898 PMID: 39661728
Run-Wei Song,?Tian-Ci Jiang,?Xue-Yang Zhang,?Cheng-Long Shen,?Qing Lou,?Chong-Xin Shan

Abstract

In classical photodynamic therapy, tumor cells are killed by the cytotoxic species via type-I/II photochemical reactions, seriously limited by the external photoexcitation and hypoxia. Herein, the electron transfer mechanism between fluorophores and peroxalate-H2O2 reaction is investigated and the singlet/triplet electron exchange is utilized to achieve long-persistent chemiluminescence imaging and synergistic type-I/II/III photodynamic therapy. As a proof-of-concept, the photosensitizers of carbon nanodots (CDs)-loaded chlorin e6 (CDs-Ce6) are designed and integrated with the peroxalate molecules, and the as-prepare polymer carbon nanodots (p-CDs) exhibit novel tumor microenvironment (TME)-responsive long-persistent near-infrared CL and photochemical reactions, evoking the in vivo imaging and synergistic dynamic therapy in tumor tissue. Mechanistically, the excess reactive oxygen species in TME can trigger the chemically initiated singlet/triplet electron exchange between the hydrophobic CDs-Ce6 and peroxalate-derived 1,2-dioxetanes and thus the excess excited singlet/triplet electron of the CDs-Ce6 can ensure the long-persistent near-infrared CL, type I/II photochemical production of hydroxyl radicals, superoxide radical and singlet oxygen, and type III photochemical damage of maladjusted biomacromolecules, enabling the long-persistent near-infrared biological imaging and enhanced cancer therapy. These results shed a new sight into the energy transfer mechanism in chemiluminescence and pave a new sight into the architecture of multifunctional theragnostic nanoplatforms.

Substances (5)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Citric acid 77-92-9 C6H8O7 1796 suppliers $5.00-$2290.00
N,N-Dimethylformamide 68-12-2 C3H7NO 1214 suppliers $11.20-$12200.00
Ethanol 64-17-5 C2H6O 805 suppliers $10.00-$17310.00
Urea 57-13-6 CH4N2O 776 suppliers $5.00-$9263.00
Polyethylene-polypropylene glycol 9003-11-6 (C3H6O.C2H4O)x 585 suppliers $21.00-$17325.00

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