Doping-Induced Anisotropic Self-Assembly of Silver Icosahedra in [Pt2Ag23Cl7(PPh3)10] Nanoclusters

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• 作者：Megalamane S. Bootharaju ; Sergey M. Kozlov ; Zhen Cao ; Moussab HarbNiladri Maity ; Aleksander Shkurenko ; Manas R. Parida ; Mohamed N. Hedhili ; Mohamed Eddaoudi ; Omar F. Mohammed ; Osman M. BakrLuigi Cavallo ; Jean-Marie Basset
• 刊名：Journal of the American Chemical Society
• 出版年：2017
• 出版时间：January 25, 2017
• 年：2017
• 卷：139
• 期：3
• 页码：1053-1056
• 全文大小：381K
• ISSN：1520-5126

文摘

Atomically precise self-assembled architectures of noble metals with unique surface structures are necessary for prospective applications. However, the synthesis of such structures based on silver is challenging because of their instability. In this work, by developing a selective and controlled doping strategy, we synthesized and characterized a rod-shaped, charge-neutral, diplatinum-doped Ag nanocluster (NC) of [Pt₂Ag₂₃Cl₇(PPh₃)₁₀]. Its crystal structure revealed the self-assembly of two Pt-centered Ag icosahedra through vertex sharing. Five bridging and two terminal chlorides and 10 PPh₃ ligands were found to stabilize the cluster. Electronic structure simulations corroborated structural and optical characterization of the cluster and provided insights into the effect of the Pt dopants on the optical properties and stability of the cluster. Our study will open new avenues for designing novel self-assembled NCs using different elemental dopants.