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Spherical lanthanide nanoclusters toward white-light emission and cell membrane imaging
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Journal Article
Spherical lanthanide nanoclusters toward white-light emission and cell membrane imaging
2023
Overview
Lanthanide doping is an effective strategy for modulating the emission of emitters. Herein, by changing the cluster composition to control the energy transfer pathway, the application potential of high-nuclearity lanthanide cluster (HLC) as white-light emitter has been confirmed for the first time. Specifically, by precisely controlling the proportion of Gd
III
, Tb
III
, and Eu
III
ions in reactants, we obtained a spherical heterotrimetallic nanocluster Gd
10
Tb
12
Eu
10
, a white-light emitter with quantum yield (QY) of 12.58% and lifetime of 327.14 µs. High-resolution electrospray ionization mass spectrometry (HRESI-MS) demonstrates that homometallic nanoclusters Ln
32
(Ln = Gd, Tb, and Eu) are tetracationic clusters and are highly stable in solution. The peripheral dense organic ligands provide a protective layer for the cluster core, which improves the stability of Ln
32
in aqueous solution, avoids the contact between metal centers and bioactive molecules, and greatly reduces the biological toxicity. In cell imaging experiments, cationic clusters Ln
32
are mainly localized on the cell membrane with negative charge distribution. As far as we know, this is the first time that spherical lanthanide nanoclusters have been used for membrane imaging of living cell, opening the door for the application of HLCs in biological imaging.
Publisher
Tsinghua University Press
Subject
