Volume 54, Issue 21 pp. 6163-6167
Communication

Orthogonal Insertion of Lanthanide and Transition-Metal Atoms in Metal–Organic Networks on Surfaces

José I. Urgel

José I. Urgel

Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

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Dr. David Ecija

Corresponding Author

Dr. David Ecija

Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

IMDEA Nanoscience, 28049 Madrid (Spain)

David Ecija, Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

Willi Auwärter, Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

Davide Bonifazi, Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)

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Dr. Willi Auwärter

Corresponding Author

Dr. Willi Auwärter

Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

David Ecija, Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

Willi Auwärter, Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

Davide Bonifazi, Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)

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Daphné Stassen

Daphné Stassen

Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)

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Prof. Dr. Davide Bonifazi

Corresponding Author

Prof. Dr. Davide Bonifazi

Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)

Department of Pharmaceutical and Chemical Sciences and INSTM UdR Trieste, University of Trieste, Piazzale Europa 1, Trieste 34127 (Italy)

David Ecija, Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

Willi Auwärter, Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

Davide Bonifazi, Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)

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Prof. Dr. Johannes V. Barth

Prof. Dr. Johannes V. Barth

Physik Department E20, Technische Universität München, 85748 Garching, München (Germany)

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First published: 01 April 2015
Citations: 54

We thank Felix Bischoff and Yuanqin He for fruitful discussions. This work was supported by the European Research Council Advanced Grant “MolArt” (Grant 247299), the Munich Center for Advanced Photonics (MAP), and the Technische Universität München-Institute for Advanced Study. D.B. gratefully acknowledges the EU through the ERC Starting Grant “COLORLANDS” project, the FRS-FNRS (FRFC contracts no. 2.4.550.09), the “TINTIN” ARC project (09/14-023), and the MIUR through the FIRB “Futuro in Ricerca” (“SUPRACARBON”, contract no. RBFR10DAK6). D.S. thanks the FNRS for her doctoral fellowship. D.E. acknowledges funding through the RyC-2012-11133 Grant.

Graphical Abstract

Surface-confined d–f bimetallic 2D coordination nanosystems have been achieved by using a three-step procedure that exploits orthogonal coordination interactions of CN-functionalized free-base porphyrin linkers with rare-earth and transition-metal centers. By systematic STM investigations the assembly process was established and the resulting nanoarchitectures characterized at the molecular level.

Abstract

The orthogonal coordinative properties of tetrapyrrole macrocycles and nitrile ligands have been used in a multistep procedure towards interfacial d-f hetero-bimetallic nanoarchitectures based on a free-base porphyrin derivative functionalized with meso-cyanobiphenylene substituents. Molecular-level scanning tunneling microscopy studies reveal that the porphyrin module alone self-assembles on Ag(111) in a close-packed layer with a square unit cell. Upon co-deposition of Gd atoms, a square-planar motif is formed that reflects the fourfold coordination of CN ligands to the rare-earth centers. The resulting nanoporous network morphology is retained following exposure to a beam of Co atoms, which induces selective porphyrin metalation and ultimately yields a gridlike 2D metallosupramolecular architecture.

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