Super Polycationic Molecular Compounds: Au144(SR+)60 Clusters
Super Polycationic Molecular Compounds: Au144(SR+)60 Clusters
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DOI：
10.1021/acs.jpcc.9b05319
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发表时间：
2019-08
期刊：
影响因子：
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通讯作者：
Kunihiro Narita;Y. Ishida;T. Yonezawa;Zhong Huang
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作者：
Kunihiro Narita;Y. Ishida;T. Yonezawa;Zhong Huang
我们最近开创了分子金（Au）簇化化合物的先河。在此，我们提出了一系列新的金团簇化合物Au144(SR+)60，这是报道的最大的具有最稳定和研究的金团簇的化合物。虽然由于存在类似尺寸的准稳定化合物，通常难以获得单一组成的Au144簇，但优化的热蚀刻和选择性沉淀使得严格的尺寸聚焦到单一的Au144组合物中成为可能，并生产出具有高原子精度的Au144(SR+)60。在正模式高分辨率ESI-MS中，观察到在+12 ~ +21带电状态下，具有不同数量PF6 -反阴离子的Au144(SR+)60簇。Au144(SR+) 60,60（+）末端分布在半径为~ 2.5 nm的球面上，据我们所知，这是迄今为止报道的最具多阳离子性的分子化合物。
We have recently pioneered per-cationized molecular gold (Au) cluster compounds. Herein, we present a new series of per-cationized Au cluster compounds, Au144(SR+)60, which is the largest reported compound with the most stable and studied Au clusters. Although it is typically difficult to obtain a single composition of a Au144 cluster due to the existence of similar-sized quasi-stable compounds, optimized thermal etching and selective precipitation made strict size focusing into a single Au144 composition possible and produced Au144(SR+)60 with high atomic precision. In positive-mode high-resolution ESI-MS, per-cationized Au144(SR+)60 clusters with different numbers of PF6– counteranions for the +12- to +21-charged states were observed. The Au144(SR+)60, 60(+) termini distributed over a spherical surface of radius ∼2.5 nm, presented here, is, to the best of our knowledge, the most polycationic molecular compound reported thus far.