Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 87: Surface chemical reactions
O 87.9: Vortrag
Freitag, 30. März 2012, 12:30–12:45, MA 042
Aggregation and Metal/Surface Reactivity of DPDI on Cu(111) — •Toni Ivas1, Susanne Martens1, Manfred Matena6, Jonas Björk2, Jorge Lobo-Checa3, Lutz H. Gade4, Thomas A. Jung1, and Meike Stöhr5 — 1University of Basel — 2Linkoping University — 3CIN2, Barcelona — 4Universität Heidelberg — 5University of Groningen — 6DIPC, San Sebastian
The perylene derivative DPDI (4,9-diaminoperylene-quinone-3,10-diimine) forms a very stable nanoporous network on Cu(111) crystals upon thermal dehydrogenation. This hexagonal network has been intensively investigated and has proven to serve as an ideal structure for the studying of host-guest assemblies, due to the considerably large pore size and the remarkable stability in particular. The pores of the dehydro-DPDI network act as quantum wells confining surface states of copper electrons and thereby producing 2D arrays of quantum dots. The DPDI network was predicted to consists of dehydrogenated DPDI forming hydrogen bonds but the recently obtained data hints at the possibility that DPDI is bound through a complex coordination network which includes copper adatoms after thermal activation/dehyrogenation. A new model has now been developed, where the DPDI is expected to undergo three dehydrogenation steps in total as well as an additional cyclization step. The hereby obtained "dehydro-DPDI" is then thought to form the coordination network. Theoretical studies as well as recent experimental results obtained by Normal Incidence X-ray Standing Wave (NIXSW) technique strongly support this new model.