Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 25, Pages 9922-9927Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201912201
Keywords
aggregation-induced emission; gels; metal nanoclusters; phosphorescence; self-assembly
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Funding
- National Natural Science Foundation of China [21972077, 21822107, 21571115, 21875129]
- Natural Science Foundation of Shandong Province [JQ201803]
- Taishan Scholar Project of Shandong Province of China [tsqn201812003]
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Luminescent metal nanoclusters (NCs) are emerging as a new class of functional materials that have rich physicochemical properties and wide potential applications. In recent years, it has been found that some metal NCs undergo aggregation-induced emission (AIE) and an interesting fluorescence-to-phosphorescence (F-P) switching in solutions. However, insights of both the AIE and the F-P switching remain largely unknown. Now, gelation of water soluble, atomically precise Ag-9 NCs is achieved by the addition of antisolvent. Self-assembly of Ag-9 NCs into entangled fibers was confirmed, during which AIE was observed together with an F-P switching occurring within a narrow time scale. Structural evaluation indicates the fibers are highly ordered. The self-assembly of Ag-9 NCs and their photoluminescent property are thermally reversible, making the metal-organic gels good candidates for luminescent ratiometric thermometers.
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