title: Functionalized supramolecular nanoporous arrays for surface templating.
abstract: Controlled self-assembly and chemical tailoring of bimolecular networks on surfaces is demonstrated using structural derivatives of 3,4:9,10-perylenetetracarboxylic diimide (PTCDI) combined with melamine (1,3,5-triazine-2,4,6-triamine). Two functionalised PTCDI derivatives have been synthesised, Br(2)-PTCDI and di(propylthio)-PTCDI, through attachment of chemical side groups to the perylene core. Self-assembled structures formed by these molecules on a Ag-Si(111)sqrt3 x sqrt3R30 degrees surface were studied with a room-temperature scanning tunneling microscope under ultrahigh vacuum conditions. It is shown that the introduction of side groups can have a significant effect upon both the structures formed, notably in the case of di(propylthio)-PTCDI which forms a previously unreported unimolecular hexagonal arrangement, and their entrapment behaviour. These results demonstrate a new route of functionalisation for network pores, opening up the possibility of designing nanostructured surface structures with chemical selectivity and applications in nanostructure templating.
authors.affiliation: School of Physics and Astronomy, University of Nottingham, University Park, Nottingham, UK.
authors.forename: Luís M A
authors.initials: LM
authors.lastname: Perdigão
authors.forename: Alex
authors.initials: A
authors.lastname: Saywell
authors.forename: Giselle N
authors.initials: GN
authors.lastname: Fontes
authors.forename: Paul A
authors.initials: PA
authors.lastname: Staniec
authors.forename: Gudrun
authors.initials: G
authors.lastname: Goretzki
authors.forename: Anna G
authors.initials: AG
authors.lastname: Phillips
authors.forename: Neil R
authors.initials: NR
authors.lastname: Champness
authors.forename: Peter H
authors.initials: PH
authors.lastname: Beton
mesh_terms: D046911:Macromolecular Substances / Q000737:chemistry; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D010569:Perylene / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D016062:Porosity; D012825:Silicon / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D014227:Triazines / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D014227:Triazines; D012834:Silver; D010569:Perylene; C011907:melamine; D012825:Silicon