Au25(SR)18的实际稳定性
Practical Stability of Au25(SR)18.
作者信息
Collins C B, Tofanelli M A, Crook M F, Phillips B D, Ackerson C J
机构信息
Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
出版信息
RSC Adv. 2017;7(71):45061-45065. doi: 10.1039/C7RA07511A. Epub 2017 Sep 21.
Superatom electron shell and/or geometric shell filling underlies the thermodynamic stability of coinage and alkali metal clusters in both theoretical and experimental results. Factors beyond simple shell filling contribute substantially to the lifetime of ligated clusters in solution. Such factors include the nature of the solvent, the atmosphere and the steric size of the ligand shell. Here we systematically lay out a 'practical' stability model for ligated metal clusters, which includes both shell-closing aspects and colloidal stability aspects. Cluster decomposition may follow either fusion or fission pathways. Solvent polarity can be determinative of the decomposition pathway.
超原子电子壳层和/或几何壳层填充是理论和实验结果中硬币金属和碱金属团簇热力学稳定性的基础。除了简单的壳层填充之外，其他因素对溶液中连接团簇的寿命也有很大贡献。这些因素包括溶剂的性质、气氛以及配体壳层的空间大小。在此，我们系统地提出了一种连接金属团簇的“实用”稳定性模型，该模型既包括壳层封闭方面，也包括胶体稳定性方面。团簇分解可能遵循融合或裂变途径。溶剂极性可以决定分解途径。
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