Bottom-up fabrication and atomic-scale characterization of triply linked, laterally π-extended porphyrin nanotapes
EntityUAM. Departamento de Química Orgánica
10.1002/anie.202105350Angewandte Chemie International Edition 60.29 (2021): 16208-16214
ISSN1433-7851 (print); 1521-3773 (online)
Funded byThis work was supported by the Swiss National Science Foundation under Grant No. 200020_182015, the European UnionQs Horizon 2020 research and innovation programme under grant agreement number 785219 (Graphene Flagship Core 2), the Office of Naval Research (N00014-18-1-2708), MINECO, CTQ2017-85393-P (Phthalophoto, T.T.), and PID2020-116490GB-I00 (Porphyrinoids, T.T., G.B.). IMDEA Nanociencia also acknowledges support from the “Severo Ochoa” Programme for Centres of Excellence in R&D (MINECO, Grant SEV-2016-0686). R.R. and N.L. are grateful for funding from the EU-FET Open H2020 Mechanics with Molecules project (grant 766864)
Projectinfo:eu-repo/grantAgreement/EC/H2020/785219/EU//GrapheneCore2; Gobierno de España. CTQ2017-85393-P; Gobierno de España. PID2020-116490GB-I00; Gobierno de España. SEV-2016-0686; info:eu-repo/grantAgreement/EC/H2020/766864/EU//MEMO
SubjectsOn-surface synthesis; Open-shell; Porphyrin nanotapes; Scanning probe microscopy/spectroscopy; Spin-split end states; Química
Rights© 2021 The Authors
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
Porphyrin nanotapes (Por NTs) are promising structures for their use as molecular wires thanks to a high degree of π-conjugation, low HOMO—LUMO gaps, and exceptional conductance. Such structures have been prepared in solution, but their on-surface synthesis remains unreported. Here, meso–meso triply fused Por NTs have been prepared through a two-step synthesis on Au(111). The diradical character of the on-surface formed building block PorA2, a phenalenyl π-extended ZnIIPor, facilitates intermolecular homocoupling and allows for the formation of laterally π-extended tapes. The structural and electronic properties of individual Por NTs are addressed, both on Au(111) and on a thin insulating NaCl layer, by high-resolution scanning probe microscopy/spectroscopy complemented by DFT calculations. These Por NTs carry one unpaired electron at each end, which leads to magnetic end states. Our study provides a versatile route towards Por NTs and the atomic-scale characterization of such tapes
Google Scholar:Sun, Qiang - Mateo, Luis M. - Robles, Roberto - Lorente, Nicolas - Ruffieux, Pascal - Bottari, Giovanni - Torres Cebada, Tomás - Fasel, Roman
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