Berlin 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 41: Inorganic/Organic Interfaces
O 41.46: Poster
Dienstag, 17. März 2015, 18:15–21:00, Poster B
Controlling Coordination Reaction and Assembly on an Insulating Boron Nitride Monolayer — José I. Urgel1, •Martin Schwarz1, Manuela Garnica1, Daphné Stassen2, Davide Bonifazi2, David Ecija3, Johannes V. Barth1, and Willi Auwärter1 — 1Physik Department E20, Technische Universität München, Germany — 2Department of Chemistry and Namur Research Center, Belgium — 3IMDEA Nanoscience, Madrid, Spain
Two-dimensional metal-organic coordination networks presenting organized arrays of metal centers and functional molecular linkers [1] have not been achieved to date on a highly relevant class of materials, namely atomically thin sp2-bound sheets as boron nitride (BN) or graphene. Here, we report the formation of a metal-organic network on a BN/Cu(111) template [2, 3] by co-deposition of carbonitrile-functionalized porphyrin derivatives (2H-TPCN) with Co atoms in an ultra-high vacuum environment. The resulting metallosupramolecular structure explored by scanning tunneling microscopy and spectroscopy features a distinct four-fold coordination motif. Furthermore, we demonstrate an in-situ metalation of the tetrapyrrole macrocycles with co-adsorbed Co yielding Co-TPCN directly on the BN sheet. Our results provide perspectives for the formation of coordination networks on BN and related systems featuring structural, electronic and magnetic properties unachievable on conventional metallic supports.
[1] Barth, J. V. Annu. Rev. Phys. Chem. 2007, 58, 375-407
[2] Joshi, S. et. al. Nano Lett. 2012, 12, 5821-5828
[3] Joshi, S. et. al. ACS Nano, 2014, 8, 430-442