纳米团簇
冷凝
金属
Atom(片上系统)
材料科学
纳米技术
化学
缩合反应
化学工程
组合化学
有机化学
催化作用
计算机科学
物理
热力学
嵌入式系统
工程类
作者
Zhi Wang,Yanjie Zhu,Olli Ahlstedt,Konstantinos Konstantinou,Jaakko Akola,Chen‐Ho Tung,Fahri Alkan,Di Sun
标识
DOI:10.1002/anie.202314515
摘要
Polyoxometalates (POMs) represent crucial intermediates in the formation of insoluble metal oxides from soluble metal ions, however, the rapid hydrolysis-condensation kinetics of MoVI or WVI makes the direct characterization of coexisted molecular species in a given medium extremely difficult. Silver nanoclusters have shown versatile capacity to encapsulate diverse POMs, which provides an alternative scene to appreciate landscape of POMs in atomic precision. Here, we report a thiacalix[4]arene protected silver nanocluster (Ag72b) that simultaneously encapsulates three kinds of molybdates (MoO42-, Mo6O228- and Mo7O258-) in situ transformed from classic Lindqvist Mo6O192-, providing more deep understanding on the structural diversity and condensation growth route of POMs in solution. Ag72b is the first silver nanocluster trapping so many kinds of molybdates, which in turn exert collective template effect to aggregate silver atoms into a nanocluster. The post-reaction of Ag72b with AgOAc or PhCOOAg produces a discrete Ag24 nanocluster (Ag24a) or an Ag28 nanocluster based 1D chain structure (Ag28a), respectively. Moreover, the post-synthesized Ag28a can be utilized as potential ignition material for further application. This work not only provides an important model for unlocking dynamic features of POMs at atom-precise level but also pioneers a promising approach to synthesize silver nanoclusters from known to unknown.
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