Extended iron phthalocyanine islands self-assembled on a Ge(001):H surface

Zuzak, Rafał; Szymoński, Marek; Godlewski, Szymon

doi:10.3762/bjnano.12.19

Cited by 3 publications

(2 citation statements)

References 69 publications

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“…The height of the chain-like structure is too high for a flat-lying molecule, meaning that MnPc molecules are adsorbed with an upright configuration on TlBiSe 2 . The presence of upright molecular configuration is reported in systems with the weak molecule–substrate interaction − and at the step edges of the surface . Since no step is observed in Figure d,e, the upright configuration of the MnPc molecules would not be due to the roughness of the surface, and we therefore conclude that the upright configuration of the MnPc molecules results from the fact that the MnPc–TlBiSe 2 interaction is weaker than the MnPc–MnPc intermolecular interaction.…”

Section: Resultssupporting

confidence: 51%

Substrate-Dependent Physical Properties at the Interface of Manganese(II) Phthalocyanine and Topological Insulators

Itaya,

Higuchi,

Nishioka

et al. 2024

J. Phys. Chem. C

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A proper understanding of the physical properties at the interface between a nonmagnetic topological insulator and a magnetic film is an indispensable input to develop high-functional spintronics devices using topological insulators. In this paper, we show the physical properties of manganese(II) phthalocyanine (MnPc)-adsorbed Bi 2 Se 3 and TlBiSe 2 , two topological insulators with similar electronic states but different surface compositions. The adsorption of MnPc induces significant electron doping on Bi 2 Se 3 , while only a small hole doping was induced on TlBiSe 2 . This difference in doping is due to the different molecular orientations on the two topological insulators: the flat-lying configuration on Bi 2 Se 3 that leads to a large overlap between the d-orbital of Mn and orbitals of surface Se, and the upright configuration on TlBiSe 2 that results from the presence of Tl atoms on the surface and leads to a negligible orbital overlap. These results pave the way for applications in spintronics devices combining magnetic organic molecules and topological insulators.

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Section: Resultssupporting

confidence: 51%

Substrate-Dependent Physical Properties at the Interface of Manganese(II) Phthalocyanine and Topological Insulators

Itaya,

Higuchi,

Nishioka

et al. 2024

J. Phys. Chem. C

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“…Physical decoupling of molecules from a semiconducting substrate is discussed for the example of both insulating CaF 2 thin films on Si(111) [ 91 ] and hydrogen passivation of Ge(001) surfaces [ 92 ]. In the first case, three scenarios were compared: PTCDA on Si, on a thin CaF 2 , and on a thicker CaF 2 layer.…”

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confidence: 99%

Molecular assemblies on surfaces: towards physical and electronic decoupling of organic molecules

Maier¹,

Stöhr²

2021

Beilstein J. Nanotechnol.

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On-surface synthesis of phthalocyanines with extended π-electron systems

Heuplick,

Fan,

Astvatsaturov

et al. 2024

Commun Chem

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Expanded phthalocyanines are a promising class of materials for optoelectronic applications, owing to their unique properties and versatile metal coordination reactivity. The expansion of their π-electron systems and resulting red-shifted absorption are of particular interest for achieving broader applications. Here, we report the on-surface synthesis of metallo-phthalocyanines with extended electron systems and an open-chain polycyanine from ortho-dicarbonitrile precursors on Ag(111) and Au(111), studied by scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). The larger 6,7-di(2-naphthyl)-2,3-naphthalenedicarbonitrile (NND) undergoes spontaneous cyclotetramerization on the Ag(111) surface forming the corresponding silver naphthalocyanines (Ag-NPc), contrasting previous reports where a partially aliphatic ortho-dicarbonitrile precursor formed polycyanine chains. In contrast, monolayers of the smaller 6,7-diphenyl-2,3-naphthalenedicarbonitrile (PND) form the corresponding naphthalocyanine only in the presence of co-adsorbed iron atoms (Fe-NPc). In the absence of iron, PND multilayers form polycyanine chains and Ag-NPc. NND and PND further differ in their reactivity due to the supramolecular behavior of their products. While the larger Ag-NPc aggregates to non-covalent one-dimensional ribbons, the smaller Fe-NPc forms an extended non-covalent two-dimensional network. Our study demonstrates the versatility of on-surface dinitrile tetramerization for the synthesis of π-extended cyclic phthalocyanines and their open-chain polycyanine counterparts.

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Extended iron phthalocyanine islands self-assembled on a Ge(001):H surface

Cited by 3 publications

References 69 publications

Substrate-Dependent Physical Properties at the Interface of Manganese(II) Phthalocyanine and Topological Insulators

Substrate-Dependent Physical Properties at the Interface of Manganese(II) Phthalocyanine and Topological Insulators

Molecular assemblies on surfaces: towards physical and electronic decoupling of organic molecules

On-surface synthesis of phthalocyanines with extended π-electron systems

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