Hierarchically organized bimolecular ladder network exhibiting guided one-dimensional diffusion.
2012
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 ∼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.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
47
References
10
Citations
NaN
KQI