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Enhanced red upconversion emission of NaYF4:Yb3+, Er3+, Mn2+ nanoparticles for near-infrared-induced photodynamic therapy and fluorescence imaging
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Enhanced red upconversion emission of NaYF4:Yb3+, Er3+, Mn2+ nanoparticles for near-infrared-induced photodynamic therapy and fluorescence imaging

Masao Kamimura, Ayumu Omoto, Hsin-Cheng Chiu 和 Kohei Soga
Chemistry Letters, 卷.46(8), 頁碼.1076-1078
2017
DOI: https://doi.org/10.1246/cl.170322

摘要

Photodynamic therapy Second biological window Upconversion Chemistry (all)
Polyethyleneimine (PEI)-capped NaYF 4 nanoparticles (NPs) codoped with Yb 3+ , Er 3+ , and Mn 2+ ions (MnUNPs) were synthesized via a solvothermal method. The MnUNPs showed tissue-penetrable over-1000 nm (OTN-) near-infrared (NIR) and strong red upconversion (UC) emission under NIR excitation. Furthermore, the photosensitizers chlorin e6 (Ce6) and biocompatible poly(ethylene glycol) (PEG) were immobilized on the surface of the MnUNPs (PEG/Ce6-MnUNPs). The prepared PEG/Ce6-MnUNPs generated singlet oxygen ( 1 O 2 ) and displayed effective anticancer activity under NIR excitation.

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