Metal-free phthalocyanine (H<sub>2</sub>Pc) molecule adsorbed on the Au(111) surface: formation of a wide domain along a single lattice direction

Komeda, Tadahiro; Isshiki, Hironari; Liu, Jie

doi:10.1088/1468-6996/11/5/054602

Cited by 28 publications

(28 citation statements)

References 26 publications

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“…1a ) was synthesized according to the previously reported procedures 22 . The molecule was transferred to a Au(111) substrate using a sublimation method under ultra-high vacuum conditions, by heating the sample in a Ta boat at ∼300 °C (refs 23 , 24 ). During the sublimation process, Cu-BCOD was converted into the Cu-Benzo molecule via a retro-Diels–Alder reaction involving the extrusion of four ethylene molecules from the fused BCOD rings as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Modulation of the molecular spintronic properties of adsorbed copper corroles

Liu

Mishra

et al. 2015

Nat Commun

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The ability to modulate the spin states of adsorbed molecules is in high demand for molecular spintronics applications. Here, we demonstrate that the spin state of a corrole complex can be tuned by expanding its fused ring as a result of the modification to the d–π interaction between the metal and ligand. A bicyclo[2.2.2]octadiene-fused copper corrole can readily be converted into a tetrabenzocorrole radical on an Au(111) substrate during the sublimation process. In the scanning tunnelling spectroscopy spectrum, a sharp Kondo resonance appears near the Fermi level on the corrole ligand of the tetrabenzocorrole molecule. In contrast, a non-fused-ring-expanded copper corrole molecule, copper 5,10,15-triphenylcorrole, shows no such Kondo feature. Mapping of the Kondo resonance demonstrates that the spin distribution of the tetrabenzocorrole molecule can be further modified by the rotation of the meso-aryl groups, in a manner that could lead to applications in molecular spintronics.

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Section: Resultsmentioning

confidence: 99%

Modulation of the molecular spintronic properties of adsorbed copper corroles

Liu

Mishra

et al. 2015

Nat Commun

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“…10, 11 Mazur et al 12 studied the spectroscopy and resonant tunneling in different metal phthalocyanines. Komdea 13 showed that the orientation of individual H 2 Pc molecules adsorbed on Au(111) is surface driven. Cheng and co-workers 14 proposed that FePc adsorption on Au(111) is controlled by molecule− molecule interactions.…”

Section: ■ Introductionmentioning

confidence: 99%

Investigation of Metal Free Naphthalocyanine Vapor Deposited on Au(111)

Wiggins

Hipps

2014

J. Phys. Chem. C

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Naphthalocyanines (Ncs) are promising candidates for future components in electronic devices and applications. To maximize the efficiency of Nc devices, it is critical to understand their structural and electronic properties and how these are impacted by deposition methods. The formation of a metal free naphthalocyanine (H 2 Nc) self-assembled monolayer on a Au(111) crystal was investigated by scanning tunneling microscopy under ultra-high-vacuum conditions at room temperature. A rigorous purification and processing procedure was developed to produce high purity, low defect, and well-ordered monolayers. High-resolution STM images reveal epitaxial growth of H 2 Nc on Au(111) with the observed structure having a molecular spacing of 1.6 ± 0.05 nm, with molecules orientated slightly off (roughly 2.5°) the low density packing direction of Au(111). A commensurate structure having 4 molecules per unit cell and unit cell parameters of A = 3.25 ± 0.05 nm, B = 3.17 ± 0.05 nm, and α = 87.5 ± 2°is proposed. Orbital-mediated tunneling spectroscopy was used to examine the electronic properties of individual molecules within the thin film. The first ionization potential and electron affinity of H 2 Nc adsorbed on Au(111) were measured to be −0.68 ± 0.03 and 1.12 ± 0.02 eV, relative to the Fermi energy.

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“…[77][78][79][80][81][82][83][84] Here we discuss the case of H 2 Pc on Au(111) surfaces. [85] An STM image of a scattered H 2 Pc molecule on an Au(111) surface obtained at a sample T of 4.7 K is illustrated in Figure 12a. The cross-like protrusions correspond to H 2 Pc molecules.…”

Section: Bonding Configuration Of Pc Moleculementioning

confidence: 99%

“…One of the two symmetry lines of a molecule is aligned to the close-packed directions of the substrate (A1, A2, or C in Figure 12b), so as to gain larger van der Waals interaction energy due to a larger overlap between the molecule and the substrate. [85] An STM image of a monolayer film of H 2 Pc molecules is shown in Figure 12c. An ordered array of molecules can be seen, together with long-range undulation, reflecting the herring-bone structure of Au (111).…”

Section: Bonding Configuration Of Pc Moleculementioning

confidence: 99%

“…The chain was parallel to the direction expressed as 24 s 1 9 t, using the unit vectors of substrate s and t, which is slightly tilted from the ½11 2 direction. The chains preferentially formed at the fcc sites sandwiched by the soliton walls of the Au(111) reconstructed surface, [85] and the centers of the Further deposition at a substrate temperature of $808C lead to the formation of a well-ordered two-dimensional (2D) film, as shown in Figure 17d. We identified two different molecules in the image, which are marked with red and blue circles.…”

Section: Hetero-ligand Double-decker Moleculementioning

confidence: 99%

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The Frontier of Molecular Spintronics Based on Multiple-Decker Phthalocyaninato Tb^IIISingle-Molecule Magnets

Katoh

Komeda

Yamashita

2016

The Chemical Record

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Ever since the first example of a double-decker complex (SnPc2) was discovered in 1936, MPc2 complexes with π systems and chemical and physical stabilities have been used as components in molecular electronic devices. More recently, in 2003, TbPc2 complexes were shown to be single-molecule magnets (SMMs), and researchers have utilized their quantum tunneling of the magnetization (QTM) and magnetic relaxation behavior in spintronic devices. Herein, recent developments in Ln(III)-Pc-based multiple-decker SMMs on surfaces for molecular spintronic devices are presented. In this account, we discuss how dinuclear Tb(III)-Pc multiple-decker complexes can be used to elucidate the relationship between magnetic dipole interactions and SMM properties, because these complexes contain two TbPc2 units in one molecule and their intramolecular Tb(III)-Tb(III) distances can be controlled by changing the number of stacks. Next, we focus on the switching of the Kondo signal of Tb(III)-Pc-based multiple-decker SMMs that are adsorbed onto surfaces, their characterization using STM and STS, and the relationship between the molecular structure, the electronic structure, and the Kondo resonance of Tb(III)-Pc multiple-decker complexes.

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Metal-free phthalocyanine (H₂Pc) molecule adsorbed on the Au(111) surface: formation of a wide domain along a single lattice direction

Cited by 28 publications

References 26 publications

Modulation of the molecular spintronic properties of adsorbed copper corroles

Modulation of the molecular spintronic properties of adsorbed copper corroles

Investigation of Metal Free Naphthalocyanine Vapor Deposited on Au(111)

The Frontier of Molecular Spintronics Based on Multiple-Decker Phthalocyaninato Tb^IIISingle-Molecule Magnets

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Metal-free phthalocyanine (H2Pc) molecule adsorbed on the Au(111) surface: formation of a wide domain along a single lattice direction

Cited by 28 publications

References 26 publications

Modulation of the molecular spintronic properties of adsorbed copper corroles

Modulation of the molecular spintronic properties of adsorbed copper corroles

Investigation of Metal Free Naphthalocyanine Vapor Deposited on Au(111)

The Frontier of Molecular Spintronics Based on Multiple-Decker Phthalocyaninato TbIIISingle-Molecule Magnets

Contact Info

Product

Resources

About

Metal-free phthalocyanine (H₂Pc) molecule adsorbed on the Au(111) surface: formation of a wide domain along a single lattice direction

The Frontier of Molecular Spintronics Based on Multiple-Decker Phthalocyaninato Tb^IIISingle-Molecule Magnets