Chemisorption of -cysteine and 3-mercaptopropionic acid on gold and copper surfaces: An infrared reflection-absorption study

Ihs, A.; Liedberg, Bo

doi:10.1016/0021-9797(91)90259-b

Cited by 146 publications

(129 citation statements)

References 20 publications

Supporting

Mentioning

114

Contrasting

Unclassified

Order By: Relevance

“…The band at 1722 cm-1 in Figure lb has been assigned to the C=O stretching vibration for a laterally hydrogen-bonded carboxylic acid terminal group, as shown in Scheme U (15,16). After CH3(CH 2 )1 2 COOH exposure, the band shifts to 1717 cm-1 ( Figure Ia).…”

Section: Resultsmentioning

confidence: 95%

“…Figure 1 shows FTIR external reflection spectroscopy (FTIR-ERS) data for Au/HS(CH 2 ) 2 COOH and Au/HS(CH 2 ) 2 CH 3 surfaces after and before exposure to a saturated vapor of myristic acid, CH 3 (CH 2 ) 12 COOH. Prior to CH 3 (CH 2 ) 12 COOH modification, the Au/HS(CH2)2COOH spectrum, Figure Ib, indicates absorptions due to the acid C=O stretch and the enhanced a-CH2 scissors mode at 1722 and 1410 cm-1, respectively (15)(16)(17)(18). After dosing, the presence of a second surface-confined CH 3 (CH 2 )1 2 COOH layer is confirmed by the appearance of the methyl C-H stretching vibration at 2964 cm-I, the increased intensity of the methylene C-H stretching vibrations at 2929 and 2858 cm-I, and the doubling of the intensity of the C=O stretching vibration at 1717 cm-1 ( Figure la).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Characterization of Two-Dimensional Molecular Recognition Interfaces

Crooks

Chailapakul

Ross

et al. 1994

Interfacial Design and Chemical Sensing

View full text Add to dashboard Cite

This document has been approved for public release and sale; N00179 its distribution is unlimited. ABSTRACT (Maximum200 words)We have used self-assembly chemistry to synthesize monolayer assemblies that function as molecular recognition interfaces. In the first part of this paper, we show that onecomponent self-assembled n-alkanethiol monolayers with carboxylic acid functionalized -endgroups specifically adsorb vapor-phase acid-terminated molecules via hydrogen bonding or vapor-phase amine-terminate molecules via proton-transfer interactions. In the second part, we demonstrate that two-component monolayers, which consist of inert n-alkanethiol framework moleculesanddefect-inducing templat• molecules, can discriminate between "--solution-phase probe molecules based on their physical and chemical characteristics. By electrochemically etching the defects and then imaging the resulting surface by scanning tunneling microscopy the defect sites can be indirectly visualized. 93-2922393 1-. We have used self-assembly chemistry to synthesize monolayer .7 assemblies that function as molecular recognition interfaces. In • Dist first part of this paper, we show that one-component selfassembled n-alkanethiol monolayers with carboxylic acid functionalized endgroups specifically adsorb vapor-phase acid-_.terminated molecules via hydrogen bonding or vapor-phase amineterminate molecules via proton-transfer interactions. In the second part, we demonstrate that two-component monolayers, which consist of inert n-alkanethiol framework molecules and defectinducing template molecules, can discriminate between solutionphase probe molecules based on their physical and chemical characteristics. By electrochemically etching the defects and then imaging the resulting surface by scanning tunneling microscopy the defect sites can be indirectly visualized.Molecular recognition is the selective binding of a probe molecule to a molecular receptor. This binding interaction relies on both non-covalent intermolecular chemical interactions, such as hydrogen bonding or van der Waals forces, and steric compatibility, such as size or shape inclusion. At present, a detailed understanding of molecular recognition phenomena is hindered primarily by two experimental problems. First, in many natural systems the receptor is a large, flexible, and complex molecule with many potential binding sites, and as a result it is difficult to quantify the specific types and magnitudes of interactions that lead to probe binding. Second, there are only a few analytical methods that are sufficiently specific and sensitive that they can be used for studying individual molecular interactions in bound probe/receptor complexes. These and other difficulties associated with natural systems have resulted in the synthesis of simpler model receptors and characterization of their interactions with probe molecules (1-3).Two general strategies have been used for synthesizing and characterizing model receptors and their complexes with probe molecules. The first is based on interactio...

show abstract

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Two-Dimensional Molecular Recognition Interfaces

Crooks

Chailapakul

Ross

et al. 1994

Interfacial Design and Chemical Sensing

View full text Add to dashboard Cite

show abstract

“…The side chain of the amino acid can also play an important role. For example, with a sulfur-containing amino acid like cysteine (HS-CH 2 -CH(NH 2 )-COOH), the strong affinity of sulfur for different metals is a key factor 9 . Cysteine presents a thiol or sulfhydryl (S-H) group that is the most chemically reactive site on a protein under physiological conditions 10 ; it is also a preferred ligand for the metallic cations.…”

Section: Introductionmentioning

confidence: 99%

Statistic evaluation of cysteine and allyl alcohol as additives for Cu-Zn coatings from citrate baths

et al. 2012

View full text Add to dashboard Cite

In the present work, cysteine and allyl alcohol were added to citrate baths as additives to Cu-Zn coatings on steel substrates. In order to verify the effects of the deposition parameters (current density, mechanical stirring speed, and additives) on the coating composition, electrochemical behavior, morphology, and microstructure properties of Cu-Zn coatings, the electrodeposition of the alloy was carried out using an experimental composite design 2 3 , in which these parameters were considered the entry variables and the measured properties were the response variables. The confidence level was 95% and the results were shown as response surface diagrams. It was possible to verify that the current density affected the zinc content in the coating, while the coating produced from cysteine-contained bath presented the worse anticorrosive performance. In a general way, it was possible to observe that the studied parameters affected the morphology, grain size, and the electrochemical behavior of these coatings, although only a few response variables were statistically influenced by them.

show abstract

“…Willner [14] Creager [15] and Wilson [16] reported on the design of sensors for glucose based on incorporating glucose oxidase into SAMs. In this paper, We employed L-cysteine (HSCH 2 CH(NH 2 )COOH) to modify the gold surface for the determination of hydroquinone in photographic imagine effluents because XPS [17] and FT-IR [18] spectroscopic studies had shown that cysteine could bind onto the gold surface through the strong sulfer-gold interaction and the surface was thus functionalized with amino acid [19] . Because sulfur-gold interactions are strong, the monolayers can be assembled in a short time and are reasonably stable upon cyclic voltammetric scanning in buffer solutions.…”

Section: Introductionmentioning

confidence: 99%

Studies on the Electrochemical Behaviour of Hydroquinone at L-cysteine Self-Assembled Monolayers Modified Gold Electrode

Wang

2002

Sensors

View full text Add to dashboard Cite

L-Cysteine is combined onto gold electrode to form a self-assembled monolayers modified electrode (L-Cys/Au SAMs) by taking advantage of strong sulfur-gold interaction. ATR-FTIR, SEM, cyclic voltammetry (CV) and impedance were used for the characterization of the film. It shows excellent stability upon voltametric scanning and a good voltametric response towards hydroquinone with the potential ranged from 0.8 to -0.2 V (vs.SCE) in 0.5M HAc-NaAc buffer solution (pH 4.8). The oxidation potential of hydroquinone on the modified electrode shifted negatively about 330 mV as compared with the bare gold electrode. The plot of catalytic current vs.its concentration has a good linear relation in the range of 2.0×10 -6~2.0×10-4 M with the correlation coefficient of 0.9986 and the detection limit of 4.0×10 -7 M by different pulse voltammetry (DPV). Mechanism for the electrocatalytical process has been studied.

show abstract

Chemisorption of -cysteine and 3-mercaptopropionic acid on gold and copper surfaces: An infrared reflection-absorption study

Cited by 146 publications

References 20 publications

Synthesis and Characterization of Two-Dimensional Molecular Recognition Interfaces

Synthesis and Characterization of Two-Dimensional Molecular Recognition Interfaces

Statistic evaluation of cysteine and allyl alcohol as additives for Cu-Zn coatings from citrate baths

Studies on the Electrochemical Behaviour of Hydroquinone at L-cysteine Self-Assembled Monolayers Modified Gold Electrode

Contact Info

Product

Resources

About