Metal-Organic Gels from Silver Nanoclusters with Aggregation-Induced Emission and Fluorescence-to-Phosphorescence Switching.,Angewandte Chemie International Edition

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Metal-Organic Gels from Silver Nanoclusters with Aggregation-Induced Emission and Fluorescence-to-Phosphorescence Switching.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-10-01 , DOI: 10.1002/anie.201912201
Zengchun Xie ₁ , Panpan Sun ₁ , Zhi Wang ₁ , Hongguang Li ₁ , Longyue Yu ₁ , Di Sun ₁ , Mengjun Chen ₁ , Yuting Bi ₁ , Xia Xin ₁ , Jingcheng Hao ₁

Affiliation

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.

中文翻译：

银纳米团簇的金属有机凝胶，具有聚集诱导的发射和荧光-磷光转换。

发光金属纳米簇（NCs）作为具有丰富的理化特性和广泛的潜在应用的一类新功能材料而兴起。近年来，已经发现一些金属NC在溶液中会发生聚集诱导发射（AIE）和有趣的荧光-磷光（F-P）转换。但是，关于AIE和F-P交换的见解仍然鲜为人知。现在，通过添加抗溶剂可以实现水溶性，原子精确的Ag ₉ NCs的凝胶化。证实了将Ag ₉ NCs自我组装成缠结的纤维，在此过程中观察到AIE以及在很短的时间范围内发生的F-P切换。结构评估表明纤维是高度有序的。Ag ₉的自组装 NC及其光致发光性质是可热逆的，因此金属有机凝胶非常适合用作发光比例温度计。

更新日期：2019-10-01

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