Synthesis and Characterization of peri-Heptacene on a Metallic Surface

Biswas K, Urgel JI, Ajayakumar MR, Ma J, Sanchez-Grande A, Edalatmanesh S, Lauwaet K, Mutombo P, Gallego JM, Miranda R, Jelinek P, Feng X, Ecija D (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Angewandte Chemie International Edition Wiley

Book Volume: 61

Article Number: e202114983

Journal Issue: 23

DOI: 10.1002/anie.202114983

Abstract

The synthesis of long n-peri-acenes (n-PAs) is challenging as a result of their inherent open-shell radical character, which arises from the presence of parallel zigzag edges beyond a certain n value. They are considered as π-electron model systems to study magnetism in graphene nanostructures; being potential candidates in the fabrication of optoelectronic and spintronic devices. Here, we report the on-surface formation of the largest pristine member of the n-PA family, i.e. peri-heptacene (n=7, 7-PA), obtained on an Au(111) substrate under ultra-high vacuum conditions. Our high-resolution scanning tunneling microscopy investigations, complemented by theoretical simulations, provide insight into the chemical structure of this previously elusive compound. In addition, scanning tunneling spectroscopy reveals the antiferromagnetic open-shell singlet ground state of 7-PA, exhibiting singlet–triplet spin-flip inelastic excitations with an effective exchange coupling (Jeff) of 49 meV.

Involved external institutions

IMDEA-Nanociencia ES Spain (ES) Technische Universität Dresden DE Germany (DE) Academy of Sciences of the Czech Republic (ASCR) / Akademie věd České republiky (AVČR) CZ Czech Republic (CZ)

How to cite

APA:

Biswas, K., Urgel, J.I., Ajayakumar, M.R., Ma, J., Sanchez-Grande, A., Edalatmanesh, S.,... Ecija, D. (2022). Synthesis and Characterization of peri-Heptacene on a Metallic Surface. Angewandte Chemie International Edition, 61(23). https://doi.org/10.1002/anie.202114983

MLA:

Biswas, Kalyan, et al. "Synthesis and Characterization of peri-Heptacene on a Metallic Surface." Angewandte Chemie International Edition 61.23 (2022).

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