On‐surface synthesis of porous graphene nanoribbons containing nonplanar [14]annulene pores. Issue 12 (18th February 2022)

• Record Type: Journal Article
• Authors: Ajayakumar, M. R.; Di Giovannantonio, Marco; Pignedoli, Carlo A.; Yang, Lin; Ruffieux, Pascal; Ma, Ji; Fasel, Roman; Feng, Xinliang
• Is Part Of: Journal of polymer science. Volume 60:Issue 12(2022)
• Page Start: 1912
• Page End: 1917
• Publication Date: 2022-02-18
• Subjects: cove‐edge -- five‐membered ring -- graphene nanoribbon -- nanopore -- nonplanar -- on‐surface synthesis; Polymers -- Periodicals; Polymerization -- Periodicals; Polymerization; Polymers; Periodicals; 547.7
• DOI: 10.1002/pol.20220003
• Languages: English
• ISSNs: 2642-4150

Abstract

Abstract: 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. Abstract :