Murugan Rathamony Ajayakumar¹, Marco Di Giovannantonio², Carlo Antonio Pignedoli^2*, Lin Yang¹, Pascal Ruffieux², Ji Ma¹, Roman Fasel^2,3*, Xinliang Feng^1,4

1 Center for Advancing Electronics Dresden (cfaed), Faculty of Chemistry and Food Chemistry, Technische Universitat Dresden, Dresden, Germany

2 Empa, Swiss Federal Laboratories for Materials Science and Technology, nanotech@surfaces Laboratory, 8600 Dübendorf, Switzerland

3 Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland

4 Department of Synthetic Materials and Functional Devices, Max Planck Institute of Microstructure Physics, Halle, Germany

* Corresponding authors emails: carlo.pignedoli@empa.ch, roman.fasel@empa.ch

DOI10.24435/materialscloud:by-jd [version v1]

Publication date: Nov 11, 2022

How to cite this record

Murugan Rathamony Ajayakumar, Marco Di Giovannantonio, Carlo Antonio Pignedoli, Lin Yang, Pascal Ruffieux, Ji Ma, Roman Fasel, Xinliang Feng, On-surface synthesis of porous graphene nanoribbons containing nonplanar [14]annulene pores, Materials Cloud Archive 2022.146 (2022), doi: 10.24435/materialscloud:by-jd.

Description

The precise introduction of nonplanar pores in the backbone of graphene nanoribbon represents a great challenge. In a recent work, 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. The record contains data to support the results of our work

Materials Cloud sections using this data

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ReadMe.yaml MD5md5:50d2de107b3abf2122755150fcf58d58	6.9 KiB	ReadMe file in yaml format detailing the content of the record
calculations-aiida-0.12.aiida MD5md5:0e3e88e9979c15d100be1288b41c1a43 Open this AiiDA archive on renkulab.io (https://renkulab.io/)	116.4 MiB	AiiDA archive containing inputs and outputs of all calculations. AiiDA version 0.12
data.tgz MD5md5:50d1308dfb15cc42914a8c69182b5d32	13.8 MiB	Compressed tar archive containing the experimental data supporting the results.

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Keywords

on-surface synthesis DFT graphene nanoribbons STM