An Ultrastable, Small {Ag7 }5+ Nanocluster within a Triangular Hollow Polyoxometalate Framework.,Angewandte Chemie International Edition

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An Ultrastable, Small {Ag7 }5+ Nanocluster within a Triangular Hollow Polyoxometalate Framework.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-07-10 , DOI: 10.1002/anie.202008402
Kentaro Yonesato ₁ , Hiroyasu Ito ₁ , Daisuke Yokogawa ₂ , Kazuya Yamaguchi ₁ , Kosuke Suzuki _{1,

3}

Affiliation

Small Ag_n nanoclusters (n<10) have been emerging as promising materials as sensing, biolabeling, and catalysis because of their unique electronic states and optical properties. However, studying synthesis, structure determination, and exploration of their properties remain major challenges as a result of the low stability of small Ag nanoclusters. Herein, we synthesized an atomically precise face‐centered‐cubic‐type small {Ag₇}⁵⁺ nanocluster supported by a novel triangular hollow polyoxometalate (POM) framework [Si₃W₂₇O₉₆]¹⁸⁻. The cluster showed unique {Ag₇}⁵⁺‐to‐POM charge transfer bands in both visible and UV light regions. Furthermore, this small {Ag₇}⁵⁺ nanocluster exhibited an unprecedented ultrastability in solution, despite having exposed Ag sites that can be accessed by small molecules, such as O₂, water, and solvents.

中文翻译：

三角空心多金属氧酸盐框架内的超稳定小型{Ag7} 5+纳米簇。

小型Ag _n纳米团簇（n <10）由于其独特的电子态和光学性质，已成为有希望的材料，如传感，生物标记和催化。然而，由于小型Ag纳米团簇的稳定性低，因此研究合成，结构确定和探索其性质仍然是主要挑战。在这里，我们合成了一个原子精确的面心立方型小的{Ag ₇ } ⁵⁺纳米簇，该簇由新型的三角形中空多金属氧酸盐（POM）框架[Si ₃ W ₂₇ O ₉₆ ] ¹⁸⁻支撑。团簇显示出独特的{Ag ₇ } ⁵⁺到可见光和紫外光区域的POM到电荷转移带。此外，这种小的{Ag ₇ } ⁵⁺纳米团簇在溶液中显示出前所未有的超稳定性，尽管具有暴露的Ag位点，而小分子（例如O ₂，水和溶剂）可以接近这些Ag位点。

更新日期：2020-09-08

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