Competing Interactions in Surface Reticulation with a Prochiral Dicarbonitrile Linker
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- 作者：Joachim Reichert ; Matthias Marschall ; Knud Seufert ; David Ecija ; Willi Auw盲rter ; Emmanuel Arras ; Svetlana Klyatskaya ; Mario Ruben ; Johannes V. Barth
- 刊名：The Journal of Physical Chemistry C
- 出版年：2013
- 出版时间：June 20, 2013
- 年：2013
- 卷：117
- 期：24
- 页码：12858-12863
- 全文大小：354K
- 年卷期：v.117,no.24(June 20, 2013)
- ISSN：1932-7455
文摘
The organic and metal-directed assembly of a prochiral carbonitrile (CN) oligophenyl molecule on a smooth noble metal substrate was investigated by combined scanning tunneling microscopy and computational modeling. The molecule is functionalized with two CN groups in meta and para positions of the terminating phenyl rings of the p-terphenyl backbone. Upon deposition on a Ag(111) surface, we observe two different organic supramolecular networks, one of them reflecting a chiroselective assembly. After coevaporating small amounts of Co, a hybrid network comprising both CN鈥損henyl and metal coordination bond motifs could be observed. Intriguingly, the CN group in the para position is favored for the metal coordination, whereas the meta group remains in a CN鈥損henyl motif. Computational modeling suggest that the high stability of the meta CN鈥損henyl motif is causing this selective interaction. An increase of the metal adatom ratio eventually induces divergent assembly of a room-temperature stable 2D random metal鈥搊rganic network.