Abstract
Fluorescence-guided phototherapy, including photodynamic and photothermal therapy, is considered an emerging noninvasive strategy for cancer treatments. Organic molecules are promising theranostic agents because of their facile construction, simple modification, and good biocompatibility. Organic systems that integrated multifunctionalities in a single component and achieved high efficiency in both imaging and therapies are rarely reported as the inherently competitive energy relaxation pathways are hard to modulate, and fluorescence quenching occurs upon molecular aggregation. Herein, a versatile theranostic platform with near-infrared emission, high fluorescence quantum yield, robust reactive oxygen species production, and excellent photothermal conversion efficiency was developed based on an aggregation-induced emission luminogen, namely, TPA-TBT. In vivo studies revealed that the TPA-TBT nanoaggregates exhibit outstanding photodynamic and photothermal therapy efficacy to ablate tumors inoculated in a mouse model. This work offers a design strategy to develop one-for-all cancer theranostic agents by modulating and utilizing the relaxation energy of excitons in full.
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