Two-Dimensional Self-Organization of Phthalocyanine and Porphyrin:  Dependence on the Crystallographic Orientation of Au

Suto, Koji; Yoshimoto, Soichiro; Itaya, Kingo

doi:10.1021/ja038857u

Cited by 112 publications

(81 citation statements)

References 14 publications

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“…For MPcs, CoPc, CuPc, and ZnPc adlayers were prepared in the same manner. 87 The same phenomena were observed for the brightness of the central spots. However, the adlayer structures obtained in solution were different from those obtained in UHV, suggesting that MPc adlayers formed on Au(111) surfaces depend on the deposition condition.…”

Section: Porphyrin and Phthalocyanine Assemblies On Goldsupporting

confidence: 68%

Recent Progresses of Electrochemical Surface Science &sim;Importance of Surface Imaging with Atomic Scale&sim;

Itaya

2015

Electrochemistry

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In the electrochemical surface science during the past 20 years, in-situ electrochemical scanning tunneling microscopy (EC-STM) and atomic force microscopy (AFM) have made significant contribution to understand various electrochemical processes with atomic scale. For examples, the underpotential deposition of copper, silver, and other metal ions; the specific adsorption of anions such as iodine and sulfate/bisulfate ions; electrochemical etching processes of metals and semiconductors and the molecular assembly of many organic molecules, such as metalloporphyrins, and metallophthalocyanines. Furthermore, we have recently developed a high resolution laser confocal microscope, combined with a differential interference contrast microscope, which enables to follows fast dynamic electrochemical processes at atomic height resolution in relatively large areas. It has been shown for the first time that single atomic steps of metals can be successfully seen by the newly developed optical microscope. Surface imaging techniques provide local pictures of electrode processes on the atomic scale, not averaged information in large areas.

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Section: Porphyrin and Phthalocyanine Assemblies On Goldsupporting

confidence: 68%

Recent Progresses of Electrochemical Surface Science &sim;Importance of Surface Imaging with Atomic Scale&sim;

Itaya

2015

Electrochemistry

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“…The square unit cell (side length b 1 = b 2 = 14.3 AE 0.2 ) we observe, agrees with observations of related metal-TPP molecules on close-packed noble metal surfaces. [23,24] The isostructural intramolecular features in the Fe-TPyP-and Fe-TPP-layers are a strong indication that in both cases genuine Fe II -porphyrin species are present. The appearance of the Fe-porphyrins revealing an apparent symmetry break characterized by the pronounced protrusions along the molecular axis, is associated with a nonplanar geometry of the porphyrin macrocycle.…”

Section: Resultsmentioning

confidence: 99%

Controlled Metalation of Self‐Assembled Porphyrin Nanoarrays in Two Dimensions

et al. 2007

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We report a bottom-up approach for the fabrication of metallo-porphyrin compounds and nanoarchitectures in two dimensions. Scanning tunneling microscopy and tunneling spectroscopy observations elucidate the interaction of highly regular porphyrin layers self-assembled on a Ag(111) surface with iron monomers supplied by an atomic beam. The Fe is shown to be incorporated selectively in the porphyrin macrocycle whereby the template structure is strictly preserved. The immobilization of the molecular reactants allows the identification of single metalation events in a novel reaction scheme. Because the template layers provide extended arrays of reaction sites, superlattices of coordinatively unsaturated and magnetically active metal centers are obtained. This approach offers novel pathways to realize metallo-porphyrin compounds, low-dimensional metal-organic architectures and patterned surfaces which cannot be achieved by conventional means.

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“…Adlayer structures of both thiol 41,42,64,75 and nonthiol containing molecules [29][30][31]44,[50][51][52][53][54]76 have been found to display notable electrochemical potential dependence, suggesting that the electrochemical potential is a key controlling parameter in the monolayer formation. The main objective of the present communication is to illustrate potential dependent SAM structures and formation processes by examples of SAM structures at atomically flat single-crystal gold surfaces in aqueous solution.…”

Section: Qijin Chimentioning

confidence: 99%

Electrochemically controlled self-assembled monolayers characterized with molecular and sub-molecular resolution

Zhang

Welinder

Chi

et al. 2011

Phys. Chem. Chem. Phys.

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Self-assembled organization of functional molecules on solid surfaces has developed into a powerful and sophisticated tool for surface chemistry and nanotechnology. A number of reviews on the topic have been available since the mid 1990s. This perspective article aims to focus on recent development in the investigations of electronic structures and assembling dynamics of electrochemically controlled self-assembled monolayers (SAMs) of thiol containing molecules on gold surfaces. A brief introduction is first given and particularly illustrated by a Table summarizing the molecules studied, the surface lattice structures and the experimental operating conditions. This is followed by discussion of two major high-resolution experimental methods, scanning tunnelling microscopy (STM) and single-crystal electrochemistry. In Section 3, we briefly address choice of supporting electrolytes and substrate surfaces, and their effects on the SAM structures. Section 4 constitutes the major body of the article by offering some details of recent studies for the selected cases, including in situ monitoring of assembling dynamics, molecular electronic structures, and the key external factors determining the SAM packing. In Section 5, we give examples of what can be offered by theoretical computations for the detailed understanding of the SAM electronic structures revealed by STM images. A brief summary of the current applications of SAMs in wiring metalloproteins, design and fabrication of sensors, and single-molecule electronics is described in Section 6. In the final two sections (7 and 8), we discuss the current status in understanding of electronic structures and properties of SAMs in electrochemical environments and what could be expected for future perspectives.

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Two-Dimensional Self-Organization of Phthalocyanine and Porphyrin: Dependence on the Crystallographic Orientation of Au

Abstract: By immersing Au substrate into a benzene solution containing both cobalt(II) phthalocyanine (CoPc) and copper(II) tetraphenyl-21H,23H-porphine (CuTPP), a two-dimensional alternate bimolecular structure was formed on the reconstructed Au(100)-(hex) surface.

Cited by 112 publications

References 14 publications

Recent Progresses of Electrochemical Surface Science &sim;Importance of Surface Imaging with Atomic Scale&sim;

Recent Progresses of Electrochemical Surface Science &sim;Importance of Surface Imaging with Atomic Scale&sim;

Controlled Metalation of Self‐Assembled Porphyrin Nanoarrays in Two Dimensions

Electrochemically controlled self-assembled monolayers characterized with molecular and sub-molecular resolution

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