Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 6, Pages 1638-1642Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201810541
Keywords
NIR-absorption; pharmacokinetics; photoacoustic imaging; photothermal conversion efficiency; quaterrylenediimide
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Funding
- National Natural Science Foundation of China [21774007, 21574009, 51873009, 51573012]
- Fundamental Research Funds for the Central Universities [PT1811]
- Beihuazhongri United Fund [PYBZ1822]
- MaxPlanck-Society
- Johannes-Gutenberg University from the Gutenberg Research College
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Precision phototheranostics, including photoacoustic imaging and photothermal therapy, requires stable photothermal agents. Developing such agents with high stability and high photothermal conversion efficiency (PTCE) remains a considerable challenge. Herein, we introduce a new photothermal agent based on water-soluble quaterrylenediimide (QDI) that can self-assemble into nanoparticles (QDI-NPs) in aqueous solution. Incorporating polyethylene glycol (PEG) into the QDI core significantly enhances both physiological stability and biocompatibility of QDI-NPs. The highly photostable QDI-NPs offer advantages including intense absorption in the near-infrared (NIR) and high PTCE of up to 64.7 +/- 4%. This is higher than that of commercial indocyanine green (ICG). Their small size (ca. 10nm) enables sustained retention in deep tumor sites and also proper clearance from the body. QDI-NPs allow high-resolution photoacoustic imaging and efficient 808nm laser-triggered photothermal therapy of cancer invivo.
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