61585 20200221144336.0 doi 10.1021/jacs.6b02151 sideral 95369 ART-2016-95369 eng Vasseur, G. p Band Dispersion Along Conjugated Organic Nanowires Synthesized on a Metal Oxide Semiconductor 2016 Access copy available to the general public Unrestricted Surface-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. info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-4-P info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-2-P This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 635919-SURFINK info:eu-repo/grantAgreement/EC/H2020/635919/EU/Functional materials from on-surface linkage of molecular precursors/SURFINK info:eu-repo/grantAgreement/EC/FP7/610446/EU/Planar Atomic and Molecular Scale devices/PAMS info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 13.858 2016 CHEMISTRY, MULTIDISCIPLINARY 10 / 166 = 0.06 2016 Q1 T1 7.492 2016 Biochemistry 2016 Q1 Colloid and Surface Chemistry 2016 Q1 Chemistry (miscellaneous) 2016 Q1 Catalysis 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Abadia, M. Miccio, L.A. Brede, J. Garcia-Lekue, A. De Oteyza, D.G. Rogero, C. (orcid)0000-0003-2698-2543 Lobo-Checa, J. Ortega, J.E. 138, 17 (2016), 5685-5692 J. Am. Chem. Soc. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 0002-7863 5982742 http://zaguan.unizar.es/record/61585/files/texto_completo.pdf Versión publicada 125915 http://zaguan.unizar.es/record/61585/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:61585 articulos driver 2020-02-21-13:47:25 ARTICLE