TY - JOUR
T1 - Self-assembly of nanoporous chiral networks with varying symmetry from sexiphenyl-dicarbonitrile on ag(111)
AU - Kühne, Dirk
AU - Klappenberger, Florian
AU - Decker, Régis
AU - Schlickum, Uta
AU - Brune, Harald
AU - Klyatskaya, Svetlana
AU - Ruben, Mario
AU - Barth, Johannes V.
PY - 2009
Y1 - 2009
N2 - The self-assembly of sexiphenyl-dicarbonitrile molecules on the Ag(111) surface is investigated using lowtemperature scanning tunneling microscopy (STM) in ultrahigh vacuum. Several, nanoporous networks with varying symmetry and pore size coexist on the surface after submonolayer deposition at room temperature. The different rectangular, rhombic, and kagomé shaped phases are commensurate with the Ag(111) substrate and extend over micrometer-sized domains separated by step edges. All phases are chiral and have very similar formation energetics. We attribute this to common construction principles: the approximately flatlying polyphenyl backbones following high-symmetry directions of the substrate, the epitaxial fit and the nodal motif composed of CN end groups laterally attracted by phenyl hydrogens. Close to saturation coverage, a single dense-packed phase prevails with all molecules aligned parallel within one domain. Our results demonstrate that porous networks of different complexity can evolve by the self-assembly of only one molecular species on a metal surface.
AB - The self-assembly of sexiphenyl-dicarbonitrile molecules on the Ag(111) surface is investigated using lowtemperature scanning tunneling microscopy (STM) in ultrahigh vacuum. Several, nanoporous networks with varying symmetry and pore size coexist on the surface after submonolayer deposition at room temperature. The different rectangular, rhombic, and kagomé shaped phases are commensurate with the Ag(111) substrate and extend over micrometer-sized domains separated by step edges. All phases are chiral and have very similar formation energetics. We attribute this to common construction principles: the approximately flatlying polyphenyl backbones following high-symmetry directions of the substrate, the epitaxial fit and the nodal motif composed of CN end groups laterally attracted by phenyl hydrogens. Close to saturation coverage, a single dense-packed phase prevails with all molecules aligned parallel within one domain. Our results demonstrate that porous networks of different complexity can evolve by the self-assembly of only one molecular species on a metal surface.
UR - http://www.scopus.com/inward/record.url?scp=70449589860&partnerID=8YFLogxK
U2 - 10.1021/jp9041217
DO - 10.1021/jp9041217
M3 - Article
AN - SCOPUS:70449589860
SN - 1932-7447
VL - 113
SP - 17851
EP - 17859
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 41
ER -