Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 17: Poster Focus Session Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation
O 17.1: Poster
Monday, March 17, 2025, 18:00–20:00, P2
Synthesis and characterization of a non-planar cyclophenylene on Au(111) — Sergio Salaverria1, Martin Irizar2,3,4, Jesus Janeiro5, Paula Angulo-Portugal6, Tao Wang2, Jan Patrick Calupitan6, •Jonathan Rodriguez-Fernandez1,7, Aran Garcia-Lekue2,8, Martina Corso6, Emilio Artacho2,3,8,9, Diego Peña5, Dolores Perez5, and Dimas G. de Oteyza1,2 — 1CINN, CSIC-UNIOVI-PA, El Entrego, Spain — 2DIPC,San Sebastián, Spain — 3CIC nanoGUNE, San Sebastián, Spain — 4PMAS, UPV/EHU, San Sebastián, Spain — 5CiQUS, Universidade de Santiago de Compostela, Spain — 6CFM-MPC, CSIC-UPV/EHU, San Sebastián, Spain — 7Physics Department, University of Oviedo, Spain — 8Ikerbasque, Basque Foundation for Science, Bilbao, Spain — 9TCM, University of Cambridge, Cambridge (UK)
Cyclophenylenes, i.e., macrocycles composed of linked benzene rings, have attracted intensive interest because of their appealing structures and potential applications.
In this work, we report the on-surface synthesis of a non-planar Au-coordinated cyclophenylene, containing four meta- and two para- connections, on a Au(111) surface, by undergoing hierarchical, metal-assisted double Ullmann coupling of a 1,10-dibrominated angular phenylene, and subsequent selective C-C bond cleavage of the four-membered rings in the resulting phenylene dimer. The chemical structure was characterized by bond-resolving (BR) STM and further supported by STS and DFT. This study offers the first approach for the synthesis of non-planar cyclophenylenes on surfaces.
Keywords: scanning tunneling microscopy; cyclophenylene; Au(111); metal-coordination; on-surface synthesis