Metal–Organic Gels from Silver Nanoclusters with Aggregation‐Induced Emission and Fluorescence‐to‐Phosphorescence Switching

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‐pho...

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Bibliographic Details
Published in:Angewandte Chemie International Edition Vol. 59; no. 25; pp. 9922 - 9927
Main Authors: Xie, Zengchun, Sun, Panpan, Wang, Zhi, Li, Hongguang, Yu, Longyue, Sun, Di, Chen, Mengjun, Bi, Yuting, Xin, Xia, Hao, Jingcheng
Format: Journal Article
Language:English
Published: Germany Wiley Subscription Services, Inc 15.06.2020
Edition:International ed. in English
Subjects:
Agglomeration
aggregation-induced emission
Assembly
Emission
Emissions
Fibers
Fluorescence
Functional materials
Gelation
Gels
metal nanoclusters
Metals
Nanoclusters
Phosphorescence
Photoluminescence
Physicochemical properties
self-assembly
Silver
Switching
Thermometers
aggregation-induced emission
metal nanoclusters
phosphorescence
self-assembly
gels
ISSN:1433-7851, 1521-3773, 1521-3773
Online Access:Get full text
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Summary: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 Ag9 NCs is achieved by the addition of antisolvent. Self‐assembly of Ag9 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 Ag9 NCs and their photoluminescent property are thermally reversible, making the metal–organic gels good candidates for luminescent ratiometric thermometers. Solvent‐induced gelation of Ag nanoclusters with atomic precision has been achieved. The metal–organic gel exhibits aggregation‐induced emission with fluorescence‐to‐phosphorescence switching and reversible changes upon heating‐‐cooling cycles.
Bibliography:These authors contributed equally to this work.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.201912201