doi:10.1021/jacs.6b02151engVasseur, G.Abadia, M.Miccio, L.A.Brede, J.Garcia-Lekue, A.De Oteyza, D.G.Rogero, C.Lobo-Checa, J.Ortega, J.E.p Band Dispersion Along Conjugated Organic Nanowires Synthesized on a Metal Oxide SemiconductorART-2016-95369Surface-confined dehalogenation reactions are versatile bottom-up approaches for the synthesis of carbonbased nanostructures with predefined chemical properties. However, for devices generally requiring low-conductivity substrates, potential applications are so far severely hampered by the necessity of a metallic surface to catalyze the reactions. In this work we report the synthesis of ordered arrays of poly(p-phenylene) chains on the surface of semiconducting TiO2(110) via a dehalogenative homocoupling of 4, 4¿- dibromoterphenyl precursors. The supramolecular phase is clearly distinguished from the polymeric one using low-energy electron diffraction and scanning tunneling microscopy as the substrate temperature used for deposition is varied. X-ray photoelectron spectroscopy of C 1s and Br 3d core levels traces the temperature of the onset of dehalogenation to around 475 K. Moreover, angle-resolved photoemission spectroscopy and tightbinding calculations identify a highly dispersive band characteristic of a substantial overlap between the precursor''s p states along the polymer, considered as the fingerprint of a successful polymerization. Thus, these results establish the first spectroscopic evidence that atomically precise carbon-based nanostructures can readily be synthesized on top of a transition-metal oxide surface, opening the prospect for the bottom-up production of novel molecule-semiconductor devices.2016http://zaguan.unizar.es/record/6158510.1021/jacs.6b02151http://zaguan.unizar.es/record/61585oai:zaguan.unizar.es:61585info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-4-Pinfo:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-2-PThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 635919-SURFINKinfo:eu-repo/grantAgreement/EC/H2020/635919/EU/Functional materials from on-surface linkage of molecular precursors/SURFINKinfo:eu-repo/grantAgreement/EC/FP7/610446/EU/Planar Atomic and Molecular Scale devices/PAMSJOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138, 17 (2016), 5685-5692by-nchttp://creativecommons.org/licenses/by-nc/3.0/es/info:eu-repo/semantics/openAccess