The precise introduction of nonplanar pores in the backbone of graphene nanoribbon represents a great challenge. Here, we explore a synthetic strategy toward the preparation of nonplanar porous graphene nanoribbon from a predesigned dibromohexabenzotetracene monomer bearing four cove-edges. Successive thermal annealing steps of the monomers indicate that the dehalogenative aryl-aryl homocoupling yields a twisted polymer precursor on a gold surface and the subsequent cyclodehydrogenation leads to a defective porous graphene nanoribbon containing nonplanar [14]annulene pores and five-membered rings as characterized by scanning tunneling microscopy and noncontact atomic force microscopy. Although the C–C bonds producing [14] annulene pores are not achieved with high yield, our results provide new synthetic perspectives for the on-surface growth of nonplanar porous graphene nanoribbons.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:88195 |
| Date | 22 January 2024 |
| Creators | Ajayakumar, M. R., Di Giovannantonio, Marco, Pignedoli, Carlo A., Yang, Lin, Ruffieux, Pascal, Ma, Ji, Fasel, Roman, Feng, Xinliang |
| Publisher | Wiley-VCH GmbH |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 2642-4169, 10.1002/pol.20220003, info:eu-repo/grantAgreement/European Commission/Horizon2020 | ERC | ERC-COG/819698//Development of Thiophene Based Conjugated Polymers in Two Dimensions/T2DCP, info:eu-repo/grantAgreement/European Commission/H2020 | SGA-RIA/881603//Graphene Flagship Core Project 3/GrapheneCore3 |
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