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Hierarchically organized bimolecular ladder network exhibiting guided one-dimensional diffusion


Makoudi, Younes; Arras, Emmanuel; Kepcija, Nenad; Krenner, Wolfgang; Klyatskaya, Svetlana; Klappenberger, Florian; Ruben, Mario; Seitsonen, Ari Paavo; Barth, Johannes V (2012). Hierarchically organized bimolecular ladder network exhibiting guided one-dimensional diffusion. ACS Nano, 6(1):549-556.

Abstract

The assembly and dynamics of a hierarchical, bimolecular network of sexiphenyl dicarbonitrile and N,N'-diphenyl oxalic amide molecules on the Ag(111) surface are studied by scanning tunneling microscopy at controlled temperature. The network formation is governed by a two-step protocol involving hierarchic interactions, including a novel carbonitrile-oxalic amide bonding motif. For temperatures exceeding similar to 70 K, more weakly bound sexiphenyl dicarbonitrile molecules carry out one-dimensional diffusion guided by the more stable substructure of the network held together by the carbonitrile-oxalic amide bonding motif. A theoretical investigation at the ab initio level confirms the different binding energies of the two coupling motifs and rationalizes the network formation and the diffusion pathway.

Abstract

The assembly and dynamics of a hierarchical, bimolecular network of sexiphenyl dicarbonitrile and N,N'-diphenyl oxalic amide molecules on the Ag(111) surface are studied by scanning tunneling microscopy at controlled temperature. The network formation is governed by a two-step protocol involving hierarchic interactions, including a novel carbonitrile-oxalic amide bonding motif. For temperatures exceeding similar to 70 K, more weakly bound sexiphenyl dicarbonitrile molecules carry out one-dimensional diffusion guided by the more stable substructure of the network held together by the carbonitrile-oxalic amide bonding motif. A theoretical investigation at the ab initio level confirms the different binding energies of the two coupling motifs and rationalizes the network formation and the diffusion pathway.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:January 2012
Deposited On:21 Jan 2013 13:03
Last Modified:16 May 2016 07:38
Publisher:American Chemical Society (ACS)
ISSN:1936-0851
Publisher DOI:https://doi.org/10.1021/nn203963a
Other Identification Number:ISI:000299368300066

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