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Journal Article

On‐surface synthesis of porous graphene nanoribbons containing nonplanar [14]annulene pores


Feng,  Xinliang       
Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society;

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Ajayakumar, M. R., Di Giovannantonio, M., Pignedoli, C. A., Yang, L., Ruffieux, P., Ma, J., et al. (2022). On‐surface synthesis of porous graphene nanoribbons containing nonplanar [14]annulene pores. Journal of Polymer Science. doi:10.1002/pol.20220003.

Cite as: https://hdl.handle.net/21.11116/0000-000A-0D7B-F
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.