期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 139, 期 48, 页码 17617-17623出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b10026
关键词
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资金
- Swiss National Science Foundation
- Office of Naval Research BRC program
- European Commission Graphene Flagship [CNECT-ICT-604391]
- Ministerio de Economia y Competitividad via the Juan de la Cierva Incorporacion grant [IJCI-2014-19291]
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 ID and 2D covalent carbon nanostructures.
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