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Abstract：
Lanthanide (Ln(3+))-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(3+) ions. Herein, we report the controlled synthesis of a new class of Ln(3+)-doped UC nanoprobes based on CsLu2F7: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 CsLu2F7: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.
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
ISSN： 1433-7851
Year： 2021
Issue： 1
Volume： 61
1 6 . 8 2 3
JCR@2021
1 6 . 1 0 0
JCR@2023
ESI Discipline： CHEMISTRY;
ESI HC Threshold：117
JCR Journal Grade：1
CAS Journal Grade：2
Cited Count：
WoS CC Cited Count： 32
SCOPUS Cited Count： 39
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 1
Affiliated Colleges：
