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On-surface structural and electronic properties of spontaneously formed Tb2Pc3 single molecule magnets

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Abstract

The single molecule magnet (SMM) bis(phthalocyaninato)terbium(III) (TbPc2) has received significant and increasing attention as an exemplar system for realizing molecule-based spin electronics. Attaining higher nuclearity via multi-decker TbPc systems has remained an outstanding challenge, as known examples of Tb2Pc3 systems are only those containing Pc rings with substituents (e.g. alkyl, alkoxyl). Here we report on the spontaneous formation of Tb2Pc3 species from TbPc2 precursors via sublimation in ultrahigh vacuum (UHV) onto an Ag(111) surface. The presence of Tb2Pc3 molecules on the surface are inspected using scanning probe microscopy with submolecular resolution supported by density functional theory (DFT) calculations and additional chemical analysis. We observe the selective presence of a Kondo resonance (30 K) in the Tb2Pc3 species, that we attribute to differences in the orientation of the internal molecular ligands. Formation of triple-decker complexes offers new possibilities to study and control magnetic interactions not accessible with standard TbPc2 molecules.

Graphical abstract: On-surface structural and electronic properties of spontaneously formed Tb2Pc3 single molecule magnets

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Publication details

The article was received on 24 May 2018, accepted on 29 Jul 2018 and first published on 08 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR04215B
Citation: Nanoscale, 2018, Advance Article
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    On-surface structural and electronic properties of spontaneously formed Tb2Pc3 single molecule magnets

    J. Hellerstedt, A. Cahlík, M. Švec, B. de la Torre, M. Moro-Lagares, T. Chutora, B. Papoušková, G. Zoppellaro, P. Mutombo, M. Ruben, R. Zbořil and P. Jelinek, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR04215B

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