Functionalization of Open Two-Dimensional Metal鈥揙rganic Templates through the Selective Incorporation of Metal Atoms

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• 作者：Jan 膶echal ; Christopher S. Kley ; Takashi Kumagai ; Frank Schramm ; Mario Ruben ; Sebastian Stepanow ; Klaus Kern
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：May 2, 2013
• 年：2013
• 卷：117
• 期：17
• 页码：8871-8877
• 全文大小：394K
• 年卷期：v.117,no.17(May 2, 2013)
• ISSN：1932-7455

文摘

Surface-confined molecular networks can serve as templates to steer the adsorption and organization of secondary ligands, metal atoms, and clusters. Here, the incorporation of Ni atoms and clusters into open two-dimensional robust metal鈥搊rganic templates self-assembled from butadiyne dibenzoic acid molecules and Fe atoms on Au(111) and Ag(100) surfaces is investigated by scanning tunneling microscopy. The metal substrate plays a crucial role in the interaction of Ni atoms with the metal鈥搊rganic host networks. On Ag(100) the metal鈥搊rganic template steers the growth of Ni clusters underneath the network pattern near the central butadiyne moiety. In contrast, on Au(111) Ni interacts preferentially with the benzene rings forming size-limited clusters inside the network cavities. Thereby, on both surfaces Ni clusters consisting of a few atoms with both high areal density and thermal stability up to 450 K are realized. The Ni-functionalized networks enable the coordination of additional molecules into the open structures demonstrating the utilization of selective interactions for the assembly of multicomponent architectures at different organizational stages.