Surface Raman scattering of self-assembled monolayers formed from 1-alkanethiols at silver [electrodes]

Bryant, Mark A.; Pemberton, Jeanne E.

doi:10.1021/ja00010a001

Cited by 301 publications

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“…These differences may be easily explained. 56 First, the SERS and FT-RS spectra probably spanned different positions of the peptide structure, and hence, bands of different wavenumbers and relative inten- …”

Section: Sers Studiesmentioning

confidence: 99%

Structural properties of bombesin‐like peptides revealed by surface‐enhanced Raman scattering on roughened silver electrodes

Podstawka

2008

Biopolymers

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This work presents a Fourier-transform absorption infrared, Fourier-transform Raman, and surface-enhanced Raman scattering (SERS) study of the following peptides belonging to the bombesin-like family: phyllolitorin, [Leu(8)]phyllolitorin, NMB, NMC, and PG-L. The SERS study was undertaken to understand the adsorption mechanism of bombesin-like peptides on an electrochemically roughened silver electrode surface and to show changes in the adsorption mechanism with alterations in amino acids and small tertiary structures. The SERS spectra presented here shows bands mainly associated with the Trp(8) residue vibrations. The presence of mainly pyrrole coring vibrations for phyllolitorin and [Leu(8)]phyllolitorin and mainly benzene coring modes for NMB and NMC indicated that these groups interact with the roughened silver electrode surface. Furthermore, N(1)-C(8) and C(3)-C(9) bonds of the PG-L indole ring seemed to have nearly a vertical orientation on the electrode surface. In addition, distinct vibrations of the C-S fragment were observed in the SERS spectra of [Leu(8)]phyllolitorin and PG-L. The strong enhancement of the nu(C=O) vibration in the [Leu(8)]phyllolitorin SERS spectrum yielded evidence that the intact C=O bond(s) bind strongly to the silver electrode surface, whereas NMC, phyllolitorin, and NMB were located near the silver surface. This finding was supported by the presence of the nu(C-C(=O)) mode. The amide I band observed at 1642 and 1634 cm(-1) for NMB and NMC, respectively, and the Raman amide III band seen in the 1282-1249 cm(-1) range for all peptides except PG-L, indicate that the strongly hydrogen-bonded alpha-helical conformation and random-coil structure are favored for binding to the surface.

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Section: Sers Studiesmentioning

confidence: 99%

Structural properties of bombesin‐like peptides revealed by surface‐enhanced Raman scattering on roughened silver electrodes

Podstawka

2008

Biopolymers

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“…Bryant and Pemberton carried out a comprehensive study on the structure of alkanethiol monolayers on silver surfaces using SERS. They have shown that longer-chain monolayers are highly ordered as in the case of gold surfaces [94]. Lee et al showed the presence of two distinct CS stretching bands of alkanethiolates on the Ag surface, one being favourable at submonolayer coverage and the other at full coverage [95].…”

Section: Raman Scatteringmentioning

confidence: 99%

Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces

Sandhyarani

Pradeep

2003

International Reviews in Physical Chemistry

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“…Evolution in the equilibrium structure of monolayers has been an important aspect of research. An extensive surface-enhanced Raman spectroscopy (SERS) investigation of alkanethiol monolayers on Au and Ag surfaces has been carried out by Bryant and Pemberton [40,41]. SAMs of CH 3 (CH 2 ) n SH (n = 2, 5, 7, 8, 9, 11, and 17) on polycrystalline gold films also have been investigated using FT-Raman spectroscopy [42].…”

Section: Phase Transitionsmentioning

confidence: 99%

Structure and dynamics of monolayers on planar and cluster surfaces

Pradeep

Sandhyarani

2002

Pure and Applied Chemistry

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Organized molecular assemblies have been one of the intensely pursued areas of contemporary chemistry. Among the various methodologies used to make organized monolayer structures, self-assembled monolayers (SAMs) have been attractive to many materials chemists owing to the simplicity of the preparative method and high stability. Advances in various techniques and their application in the study of SAMs have significantly improved our understanding of these molecular systems. These studies have been further intensified since the successful preparation of stable metal clusters protected with monolayers. This article reviews the structure, temperature-induced phase transitions, and associated dynamics of monolayers, principally in the context of our own work in this area. Alkanethiols on Au (111) and Ag(111) are taken as archetypal systems to discuss the properties of 2D SAMs; studies from our laboratory have been on evaporated thin films. Alkanethiols on Au and Ag cluster surfaces are taken as examples of 3D SAMs. Although our principal focus will be on alkanethiols, we will touch upon a few other adsorbate systems as well.

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Surface Raman scattering of self-assembled monolayers formed from 1-alkanethiols at silver [electrodes]

Cited by 301 publications

References 0 publications

Structural properties of bombesin‐like peptides revealed by surface‐enhanced Raman scattering on roughened silver electrodes

Structural properties of bombesin‐like peptides revealed by surface‐enhanced Raman scattering on roughened silver electrodes

Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces

Structure and dynamics of monolayers on planar and cluster surfaces

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