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Título: | On-surface cyclization of ortho-dihalotetracenes to four- and six-membered rings |
Autor: | Sánchez, Carlos; Nicolaï, Adrien; Rossel, Frédéric; Cai, Jinming; Liu, Junzhi; Feng, Xinliang; Müllen, Klaus; Ruffieux, Pascal; Fasel, Román; Meunier, Vincent | Fecha de publicación: | 6-dic-2017 | Editor: | American Chemical Society | Citación: | Journal of the American Chemical Society 139(48): 17617-17623 (2017) | Resumen: | We report on the surface-catalyzed formal [2+2] and [2+2+2] cycloadditions of ortho-activated tetracene species on a Ag(111) substrate under ultrahigh vacuum conditions. Three different products are obtained: tetracene dimers, trimers, and tetramers. The former results from the formation of a four-membered ring while the other two arise from cyclization into six-membered rings. These on-surface reactions have been monitored by scanning tunneling microscopy and rationalized by density functional theory calculations. Our approach, based on the reaction of ortho-dihalo precursor monomers via formal cycloadditions, establishes an additional method for the highly active field of on-surface synthesis and enables the development of novel 1D and 2D covalent carbon nanostructures. | Versión del editor: | https://doi.org/10.1021/jacs.7b10026 | URI: | http://hdl.handle.net/10261/188701 | DOI: | 10.1021/jacs.7b10026 | Identificadores: | doi: 10.1021/jacs.7b10026 issn: 0002-7863 e-issn: 1520-5126 |
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