Separation of Precise Compositions of Noble Metal Clusters Protected with Mixed Ligands

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• 作者：Yoshiki Niihori ; Miku Matsuzaki ; Thalappil Pradeep ; Yuichi Negishi
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：April 3, 2013
• 年：2013
• 卷：135
• 期：13
• 页码：4946-4949
• 全文大小：325K
• 年卷期：v.135,no.13(April 3, 2013)
• ISSN：1520-5126

文摘

This report describes the precise and systematic synthesis of PdAu₂₄ clusters protected with two types of thiolate ligands (-SR1 and -SR2). It involved high-resolution separation of metal clusters containing a distribution of chemical compositions, PdAu₂₄(SR1)_18鈥?i>n(SR2)_n (n = 0, 1, 2, ..., 18), to individual clusters of specific n using high-performance liquid chromatography. Similar high-resolution separation was achieved for a few ligand combinations as well as clusters with other metal cores, such as Au₂₅ and Au₃₈. These results demonstrate the ability to precisely control the chemical composition of two types of ligands in thiolate-protected mono- and bimetallic metal clusters. It is expected that greater functional control of thiolate-protected metal clusters, their regular arrays, and systematic variation of their properties can now be achieved.