Zuzak, RafalCastro Esteban, JesúsEngelund, MadsPérez Meirás, María DoloresPeña Gil, DiegoGodlewski, Szymon2026-01-292026-01-292023-01-24R. Zuzak, J. Castro-Esteban, M. Engelund, D. Pérez, D. Peña, S. Godlewski. On-Surface Synthesis of Nanographenes and Graphene Nanoribbons on Titanium Dioxide. ACS Nano 2023, 17, 3, 2580–2587 (DOI: 10.1021/acsnano.2c10416)1936-0851https://hdl.handle.net/10347/45555Artículo científico revisado por pares publicado en ACS Nano. Se deposita la versión editorial en acceso abierto conforme a la política de la editorial.The article describes the formation of two types of nanographenes from custom designed and synthesized molecular precursors, through thermally induced intramolecular cyclodehydrogenation reactions on the semiconducting TiO2(110)-(1×1) surface. The obtention of the nanographenes was confirmed by the combination of high-resolution scanning tunneling microscopy (STM) and spectroscopy (STS) measurements, and corroborated by theoretical modeling. The application of this protocol on differently shaped molecular precursors demonstrates the ability to induce a highly efficient planarization reaction both within strained pentahelicenes as well as between vicinal phenyl rings. Additionally, by the combination of successive Ullmann-type polymerization and cyclodehydrogenation reactions, the archetypic 7-armchair graphene nanoribbons (7-AGNRs) have also been fabricated on the titanium dioxide surface from the standard 10,10′-dibromo-9,9′-bianthryl (DBBA) molecular precursors. These examples of the effective cyclodehydrogenative planarization processes provide perspectives for the rational design and synthesis of molecular nanostructures on semiconductorsengCopyright © 2023 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY 4.0.Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/titanium dioxidenanographenegraphene nanoribbonon-surface synthesiscyclodehydrogenation2306 Química orgánica2211 Física del estado sólidojournal article10.1021/acsnano.2c10416open access