Enhancing Dye-Triplet-Sensitized Upconversion Emission Through the Heavy-Atom Effect in CsLu 2 F 7 :Yb/Er Nanoprobes

Enhancing Dye-Triplet-Sensitized Upconversion Emission Through the Heavy-Atom Effect in CsLu 2 F 7 :Yb/Er Nanoprobes

Lanthanide (Ln )-doped upconversion (UC) nanoprobes, which have drawn extensive attention for various bioapplications, usually suffer from small absorption cross-sections and weak luminescence intensity of Ln ions. Herein, we report the controlled synthesis of a new class of Ln -doped UC nanoprobes...

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Veröffentlicht in:Angewandte Chemie International Edition 2022-01, Vol.61 (1), p.e202112125
Hauptverfasser: Zhang, Peng, Ke, Jianxi, Tu, Datao, Li, Jiayao, Pei, Yifan, Wang, Le, Shang, Xiaoying, Guan, Tianyong, Lu, Shan, Chen, Zhuo, Chen, Xueyuan
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container_start_page e202112125
container_title Angewandte Chemie International Edition
container_volume 61
creator Zhang, Peng
Ke, Jianxi
Tu, Datao
Li, Jiayao
Pei, Yifan
Wang, Le
Shang, Xiaoying
Guan, Tianyong
Lu, Shan
Chen, Zhuo
Chen, Xueyuan
description Lanthanide (Ln )-doped upconversion (UC) nanoprobes, which have drawn extensive attention for various bioapplications, usually suffer from small absorption cross-sections and weak luminescence intensity of Ln ions. Herein, we report the controlled synthesis of a new class of Ln -doped UC nanoprobes based on CsLu F :Yb/Er nanocrystals (NCs), which can effectively increase the intersystem crossing (ISC) efficiency from singlet excited state to triplet excited state of IR808 up to 99.3 % through the heavy atom effect. By virtue of the efficient triplet sensitization of IR808, the optimal UC luminescence (UCL) intensity of IR808-modified CsLu F :Yb/Er NCs is enhanced by 1309 times upon excitation at 808 nm. Benefiting from the intense dye-triplet-sensitized UCL, the nanoprobes are demonstrated for sensitive assay of extracellular and intracellular hypochlorite with an 808-nm/980-nm dual excited ratiometric strategy.
doi_str_mv 10.1002/anie.202112125
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