In Situ Scanning Tunneling Microscopy of Ordering Processes of Adsorbed Porphyrin on Iodine-Modified Ag(111)

Ogaki, K.; Batina, Nikola; Kunitake, Masashi; Itaya, Kingo

doi:10.1021/jp953517j

Cited by 99 publications

(100 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[105][106][107][108][109][110] Highly ordered arrays of 5,10,15,-20-tetrakis(N-methylpyridinium-4-yl)porphyrin (H 2 TMPyP) molecules were formed on the I-Au(111), 105 I-Ag(111), 106 I-Pt(100), 107 and S-modified Au(111) 108 electrodes. However, the ordering of porphyrin array directly attached on a bare Au(111) surface at electrochemical interface was subsequently reported by He et al 109 Potential modulation plays a significant role for controlling the surface mobility of tetra(4-pyridyl)porphyrin (TPyP) molecules.…”

Section: -Pys (44mentioning

confidence: 99%

Molecular Assemblies of Functional Molecules on Gold Electrode Surfaces Studied by Electrochemical Scanning Tunneling Microscopy: Relationship between Function and Adlayer Structures

Yoshimoto

2006

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

In this research, molecular assembly and function of aromatic thiols, porphyrins, phthalocyanines, and fullerenes on gold single crystal surfaces was studied by electrochemical methods and scanning tunneling microscopy (STM). Surface functions of promoter molecules such as pyridinethiols, pyrimidinethiols, and benzenethiol for cytochrome c electrochemistry were characterized by electrochemical techniques. Adlayer structures of those molecules were investigated by in situ STM, and molecular orientations for each molecule on the Au surfaces were clarified at molecular level. Adlayers of porphyrins and phthalocyanines for electrocatalytic reduction of dioxygen were examined to elucidate the relationship between activity and adlayer structure. Stable two-dimensional arrays of cobalt porphyrins indicated two-electron reduction of O 2 to H 2 O 2 , whereas two-step four-electron reduction of O 2 to H 2 O occurred because of highly mobile porphyrinatoiron molecules on the surface. Furthermore, well-defined adlayers of crown-substituted phthalocyanine for host-guest interface and binary array consisting of porphyrin and phthalocyanine for the design of supramolecular nanoarchitectures were clearly visualized by STM. Finally, a unique approach for controlling molecular orientation was found by the formation of supramolecular assemblies consisting of porphyrin and fullerene. The electrochemical redox reaction of carbonyl and ferrocene moieties was promoted by using the simple method for the construction of a 1:1 supramolecular assembled film consisting of C 60 derivative and octaethylporphyrinatometal on Au single crystal surfaces.In the field of electrochemistry, surface modification is often used for controlling electron-transfer reactions and catalytic activity. Especially, the electron-transfer reaction of a metalloprotein is currently one of the most active areas in bioelectrochemistry and related fields.

show abstract

Section: -Pys (44mentioning

confidence: 99%

Molecular Assemblies of Functional Molecules on Gold Electrode Surfaces Studied by Electrochemical Scanning Tunneling Microscopy: Relationship between Function and Adlayer Structures

Yoshimoto

2006

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

show abstract

“…Highly ordered molecular arrays with characteristic shapes appeared on top of the iodine adsorbed on the Au(111) surface. 68 This observation was extended to IAg(111), 69 I-Pt(100), 70 and sulfur-modified Au(111) surfaces. The Borguet group 73 formed a free-base porphyrin array directly attached to a bare Au(111) surface at the electrochemical interface.…”

Section: Sulfate/bisulfate Adlayersmentioning

confidence: 73%

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

Itaya

2015

Electrochemistry

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Because of advances in probe microscopies, we can now observe directly images of individual molecules and their arrangements. Excellent images of various species such as aliphatic molecules [940][941][942], aromatic molecules [943][944][945][946][947][948][949][950][951], porphyrins and their families [952][953][954][955][956][957][958][959][960], fullerenes [961][962][963][964][965][966][967] and polymers [968] are now available. In addition, manipulation of molecular level processes has been demonstrated.…”

Section: Molecular Arrays and Materials Arrays On Surfacesmentioning

confidence: 99%

Challenges and breakthroughs in recent research on self-assembly

Ariga

Hill

Lee

et al. 2008

Science and Technology of Advanced Materials

739

410

View full text Add to dashboard Cite

The controlled fabrication of nanometer-scale objects is without doubt one of the central issues in current science and technology. However, existing fabrication techniques suffer from several disadvantages including size-restrictions and a general paucity of applicable materials. Because of this, the development of alternative approaches based on supramolecular self-assembly processes is anticipated as a breakthrough methodology. This review article aims to comprehensively summarize the salient aspects of self-assembly through the introduction of the recent challenges and breakthroughs in three categories: (i) types of self-assembly in bulk media; (ii) types of components for self-assembly in bulk media; and (iii) self-assembly at interfaces.

show abstract

In Situ Scanning Tunneling Microscopy of Ordering Processes of Adsorbed Porphyrin on Iodine-Modified Ag(111)

Cited by 99 publications

References 26 publications

Molecular Assemblies of Functional Molecules on Gold Electrode Surfaces Studied by Electrochemical Scanning Tunneling Microscopy: Relationship between Function and Adlayer Structures

Molecular Assemblies of Functional Molecules on Gold Electrode Surfaces Studied by Electrochemical Scanning Tunneling Microscopy: Relationship between Function and Adlayer Structures

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

Challenges and breakthroughs in recent research on self-assembly

Contact Info

Product

Resources

About