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Gerami M, Farrokhpour H, Orangi N. Charge Transfer Surface-Enhanced Raman and Absorption Spectra of the Zwitterionic Form of Cysteine Adsorbed on M@Au 12 (M = Au, Ag, Pt, and Pd) Nanoclusters. J Phys Chem A 2023; 127:3991-4004. [PMID: 37116314 DOI: 10.1021/acs.jpca.3c00362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
The effect of the core atom type of the M@Au12 nanocluster (M = Au, Ag, Pt, and Pd) on the normal (NR) and charge-transfer surface-enhanced Raman spectroscopy (CT-SERS) of the zwitterion form of l-cysteine (ZWCYS) adsorbed on two different sites (D1 and D2) of the nanocluster is investigated separately in the gas phase and water. Because SERS requires the calculation of the absorption spectrum, the effect of the core atom type on the absorption spectrum of M@Au12 and its complex with the ZWCYS has also been investigated. The vibrational bands that show the intensity enhancement in the CT-SERS of the ZWCYS interacting with the D1 site of M@Au12 nanocluster in water are O─C═O asymmetric stretching (M = Au and Ag), NH2 bending (M = Ag), S-H stretching (M = Ag, Pt, and Pd), CH2 bending (M = Pt), and CH2 symmetric stretching (M = Pt and Pd). The ZWCYS at the D2 site of the M@Au12 nanocluster in water exhibits intensity enhancement for O─C═O asymmetric stretching (M = Pt), NH3 wagging (M = Au), and S-H stretching (M = Pd). The intensity of the vibrational bands of ZWCYS does not increase for M = Ag but decreases for O─C═O asymmetric stretching, S-H stretching, CH2 symmetric stretching, CH2 asymmetric stretching, and especially NH2 symmetric stretching.
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Affiliation(s)
- Mehrdad Gerami
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Hossein Farrokhpour
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Nasim Orangi
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
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2
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Voltammetric Electrochemical Behavior of Carbon Paste Electrode Containing Intrinsic Silver for Determination of Cysteine. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10070240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this paper, the electrochemical behavior of cysteine is described, using carbon paste electrodes (CPEs) modified with ternary silver-copper sulfide containing intrinsic silver at two pH values (pH 3 and 5). Experiments have revealed that presence of cysteine has a large impact on the electrochemical behavior of modified CPEs. Observed phenomena take place in solution, as well as at the surface of the modified CPEs, and can be applied for electroanalytical purposes. Based on the electrochemical behavior observed in the examined system, differential pulse voltammetry (DPV) was selected as an electroanalytical method for determination of cysteine. The effects of the various parameters on the electroanalytical signal, such as the amount of electroactive material, electroanalytical parameters, pH etc., were investigated using differential pulse voltammograms. The results indicated that electrochemical signal characterized with well-defined cathodic peak at 0.055 V vs. Ag/AgCl (3 M) in acetic buffer solution at pH 5 can be used for indirect electrochemical determination of cysteine. The optimization procedure revealed that the most sensitive and stabile electrode was that containing 5% modifier. The DPV response of the electrode, in the presence of cysteine, showed two different linear concentration ranges of 0.1 to 2.5 μM, and 5.6 to 28 μM. The explanation of the origin of two linear ranges is proposed. The lower concentration range was characterized by remarkable sensitivity of the 11.78 μA μM–1, owing to the chosen indirect method of determination. The calculated limit of detection (LOD), as well as limit of quantification (LOQ) were 0.032 and 0.081 μM, respectively. The influence of interfering agents on the electroanalytical response was examined, and low or no interference on the DPVs was observed. The proposed method was validated and applied for the determination of cysteine in pharmaceutical preparations with satisfactory recoveries in the range of 97 to 101.7%.
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Pem B, Toma M, Vrček V, Vinković Vrček I. Combined NMR and Computational Study of Cysteine Oxidation during Nucleation of Metallic Clusters in Biological Systems. Inorg Chem 2021; 60:4144-4161. [PMID: 33657797 DOI: 10.1021/acs.inorgchem.1c00321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The widespread biomedical applications of silver and gold nanoparticles (AgNPs and AuNPs, respectively) prompt the need for mechanistic evaluation of their interaction with biomolecules. In biological media, metallic NPs are known to transform by various pathways, especially in the presence of thiols. The interplay between metallic NPs and thiols may lead to unpredictable consequences for the health status of an organism. This study explored the potential events occurring during biotransformation, dissolution, and reformation of NPs in the thiol-rich biological media. The study employed a model system evaluating the interaction of cysteine with small-sized AgNPs and AuNPs. The interplay of cysteine on transformation and reformation pathways of these NPs was experimentally investigated by nuclear magnetic resonance (NMR) spectroscopy and supported by light scattering techniques and transmission electron microscopy (TEM). As the main outcome, Ag- or Au-catalyzed oxidation of cysteine to cystine was found to occur through generation of reactive oxygen species (ROS). Computational simulations confirmed this mechanism and the role of ROS in the oxidative dimerization of biothiol during NPs reformation. The obtained results represent valuable mechanistic data about the complex events during the transport of metallic NPs in thiol-rich biological systems that should be considered for the future biomedical applications of metal-based nanomaterials.
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Affiliation(s)
- Barbara Pem
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000 Zagreb, Croatia
| | - Mateja Toma
- Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Valerije Vrček
- Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Ivana Vinković Vrček
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000 Zagreb, Croatia
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Dourado AH, De Angelis LD, Arenz M, Córdoba de Torresi SI. L-cysteine oxidation on Pt and Au rotating disk electrodes: Insights on mixed controlled kinetics. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114920] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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5
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Koswattage KR, Ishii H. Photoemission investigation of interaction between L‐cysteine and silver surface. SURF INTERFACE ANAL 2020. [DOI: 10.1002/sia.6771] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kaveenga Rasika Koswattage
- Faculty of TechnologySabaragamuwa University of Sri Lanka Belihuloya Sri Lanka
- Faculty of Applied SciencesSabaragamuwa University of Sri Lanka Belihuloya Sri Lanka
| | - Hisao Ishii
- Center for Frontier ScienceChiba University Chiba Japan
- Graduate School of Advanced Integration ScienceChiba University Chiba Japan
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Farkhondeh H, Rahsepar FR, Zhang L, Leung KT. Structural and Chemical Evolution of l-Cysteine Nanofilm on Si(111)-√3×√3-Ag: From Preferential Growth at Step Edges and Antiphase Boundaries at Room Temperature to Adsorbate-Mediated Metal Cluster Formation at Elevated Temperature. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16185-16200. [PMID: 31661626 DOI: 10.1021/acs.langmuir.9b02852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The interaction of cysteine molecules with the Si(111)-√3×√3-Ag surface has been investigated over the submonolayer to multilayer regime using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and density functional theory calculations. With both upper step and lower step terraces, step edges, and antiphase boundaries, the √3×√3-Ag overlayer supported on Si(111) provides a rich two-dimensional template for studying site-specific biomolecular interactions. As an amino acid with three functional groups, cysteine is found to chemisorb through S-H bond cleavage and S-Ag bond linkage first at step edges and antiphase boundaries followed by island formation and expanded growth onto terraces. Intermolecular interactions are dominated by zwitterionic hydrogen bonding at higher coverages, producing a porous unordered interfacial layer composed of cysteine agglomerates at room temperature. Upon annealing, cysteine adsorbates induce structural transformation of the uniform √3×√3-Ag reconstructed surface lattice into metallic Ag clusters with a narrow size distribution and short-range ordering. Preferential nanoaggregate formation of cysteine at defect sites and cysteine-induced metal cluster formation promise a new approach to fabricating nanoclusters for potential applications in chemical sensing and catalysis.
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Affiliation(s)
- Hanieh Farkhondeh
- WATLab and Department of Chemistry , University of Waterloo , Waterloo , Ontario N2L3G1 , Canada
| | - Fatemeh R Rahsepar
- WATLab and Department of Chemistry , University of Waterloo , Waterloo , Ontario N2L3G1 , Canada
| | - Lei Zhang
- WATLab and Department of Chemistry , University of Waterloo , Waterloo , Ontario N2L3G1 , Canada
| | - Kam Tong Leung
- WATLab and Department of Chemistry , University of Waterloo , Waterloo , Ontario N2L3G1 , Canada
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7
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Dourado AHB, Arenz M, Córdoba de Torresi SI. Mechanism of Electrochemical L‐Cysteine Oxidation on Pt. ChemElectroChem 2019. [DOI: 10.1002/celc.201801575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- André H. B. Dourado
- Instituto de QuímicaUniversidade de São Paulo Av. Prof. Lineu Prestes 05508-080 São Paulo – SP Brazil
| | - Matthias Arenz
- Chemistry departamentKøbenhavn Universitet Universistetsparken 5 2100 Copenhagen, Denmark
- Present address: Department of Chemistry and BiochemistryUniversität Bern Freiestrasse 3 CH – 3012 Bern Switzerland
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8
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Dourado AHB, Silva RA, Torresi RM, Sumodjo PTA, Arenz M, Cordoba de Torresi SI. Kinetics, Assembling, and Conformation Control of L‐Cysteine Adsorption on Pt Investigated by
in situ
FTIR Spectroscopy and QCM‐D. Chemphyschem 2018; 19:2340-2348. [DOI: 10.1002/cphc.201800380] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Indexed: 01/26/2023]
Affiliation(s)
- André H. B. Dourado
- Depto. Química FundamentalInstituto de QuímicaUniversidade de São Paulo Av. Prof. Lineu Prestes 05508-080 São Paulo – SP Brazil
| | - Rubens A. Silva
- Depto. Química FundamentalInstituto de QuímicaUniversidade de São Paulo Av. Prof. Lineu Prestes 05508-080 São Paulo – SP Brazil
| | - Roberto M. Torresi
- Depto. Química FundamentalInstituto de QuímicaUniversidade de São Paulo Av. Prof. Lineu Prestes 05508-080 São Paulo – SP Brazil
| | - Paulo T. A. Sumodjo
- Depto. Química FundamentalInstituto de QuímicaUniversidade de São Paulo Av. Prof. Lineu Prestes 05508-080 São Paulo – SP Brazil
| | - Matthias Arenz
- Chemistry DepartmentKøbenhavn Universitet Universistetsparken 5 2100 Copenhagen Denmark
- Present Adress: Department of Chemistry and BiochemistryUniversität Bern Freiestrasse 3 CH – 3012 Bern Switzerland
| | - Susana I. Cordoba de Torresi
- Depto. Química FundamentalInstituto de QuímicaUniversidade de São Paulo Av. Prof. Lineu Prestes 05508-080 São Paulo – SP Brazil
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9
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Xue B, Fu Y, Li J, Liu E. Voltammetric Determination of Serine Using L-Cysteine Modified Platinum Electrode and Brief Exploration from the Theoretical Perspective. ELECTROANAL 2018. [DOI: 10.1002/elan.201700682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Bingchun Xue
- School of Chemistry and Materials Science; Shanxi Normal University; No.1 Gongyuan Road Linfen 041000 Shanxi Province China
| | - Yan Fu
- School of Chemistry and Materials Science; Shanxi Normal University; No.1 Gongyuan Road Linfen 041000 Shanxi Province China
| | - Jing Li
- School of Chemistry and Materials Science; Shanxi Normal University; No.1 Gongyuan Road Linfen 041000 Shanxi Province China
| | - Erbao Liu
- School of Chemistry and Materials Science; Shanxi Normal University; No.1 Gongyuan Road Linfen 041000 Shanxi Province China
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10
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Dourado AHB, Pastrián FC, Torresi SICDE. The long and successful journey of electrochemically active amino acids. From fundamental adsorption studies to potential surface engineering tools. AN ACAD BRAS CIENC 2018; 90:607-630. [PMID: 29340478 DOI: 10.1590/0001-3765201720170434] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 07/26/2017] [Indexed: 12/11/2022] Open
Abstract
Proteins have been the subject of electrochemical studies. It is possible to apply electrochemical techniques to obtain information about their structure due to the presence of five electroactive amino acids that can be oriented to the outside of the peptidic chain. These amino acids are L-Tryptophan (L-Trp), L-Tyrosine (L-Tyr), L-Histidine (L-His), L-Methionine (L-Met) and L-Cysteine (L-Cys); their electrochemical behavior being subject of extensive research, but it is still controversial. No spectroscopic investigations have been reported on L-Trp, and due to the short life time of the intermediates, ex situ techniques cannot be employed, leading to a never-ending discussion about possible intermediates. In the L-Tyr and L-His cases, spectroelectrochemical studies were performed and different intermediates were observed, suggesting that some intermediates may be observed under specific conditions, as proposed for L-Cys. This amino acid is the most interesting among the electroactive ones because of the presence of a thiol moiety at its side chain, leading to a wide range of oxidation states. It can adsorb onto surfaces of different crystallographic orientation in stereoselective conformation, modifying the surface for different applications.as a surface engineering tool since it plays the role of as an anchor for the growing of nanocrystals inside proteic templates.
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Affiliation(s)
- André H B Dourado
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Fabián C Pastrián
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
| | - Susana I Córdoba DE Torresi
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil
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11
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Salim Rosales CB, Rojas MI, Avalle LB. Differentiated interactions in phosphate solutions: Comparing Ag(111) and Ag(100) surfaces. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.06.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Dourado AHB, de Lima Batista AP, Oliveira-Filho AGS, Sumodjo PTA, Cordoba de Torresi SI. l-Cysteine electrooxidation in alkaline and acidic media: a combined spectroelectrochemical and computational study. RSC Adv 2017. [DOI: 10.1039/c6ra26576f] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The wide possibilities of l-cysteine and l-cystine adsorbed and/or oxidized species onto Pt were explored by FTIR experiments and DFT calculations.
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Affiliation(s)
- André H. B. Dourado
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- 05508-000 São Paulo
- Brazil
| | - Ana P. de Lima Batista
- Departamento de Química
- Faculdade de Filosofia
- Ciências e Letras de Ribeirão Preto
- Universidade de São Paulo
- Ribeirão Preto
| | - Antonio G. S. Oliveira-Filho
- Departamento de Química
- Faculdade de Filosofia
- Ciências e Letras de Ribeirão Preto
- Universidade de São Paulo
- Ribeirão Preto
| | - Paulo T. A. Sumodjo
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- 05508-000 São Paulo
- Brazil
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13
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Juarez MF, Toader AM, Negrila C, Santos E, Lazarescu V. Combined ab initio and XPS Investigations of the Electronic Interactions of L-Cysteine Adsorbed on GaAs(1 0 0). ChemistrySelect 2016. [DOI: 10.1002/slct.201600589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- María F. Juarez
- Institute of Theoretical Chemistry; Ulm University; 89081 Ulm Germany
| | - Ana M. Toader
- Institute of Physical Chemistry Ilie Murgulescu; Splaiul Independentei; Bucharest Romania
| | | | - Elizabeth Santos
- Institute of Theoretical Chemistry; Ulm University; 89081 Ulm Germany
- Instituto de Física Enrique Gaviola (IFEG-CONICET-FaMAF); Universidad de Córdoba; Argentina
| | - Valentina Lazarescu
- Institute of Physical Chemistry Ilie Murgulescu; Splaiul Independentei; Bucharest Romania
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14
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Saavedra-Torres M, Tielens F, Santos JC. Dibenzyl disulfide adsorption on Cu(111) surface: a DFT study. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1763-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Zhang Y, Cai Y, Qi Z, Lu L, Qian Y. DNA-Templated Silver Nanoclusters for Fluorescence Turn-on Assay of Acetylcholinesterase Activity. Anal Chem 2013; 85:8455-61. [DOI: 10.1021/ac401966d] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yaodong Zhang
- Key Laboratory
of Applied Surface
and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical
Chemistry for Life Science of Shaanxi Province, School of Chemistry
and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, PR China
| | - Yanan Cai
- Key Laboratory
of Applied Surface
and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical
Chemistry for Life Science of Shaanxi Province, School of Chemistry
and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, PR China
| | - Zongli Qi
- Lab Center, the Third Affiliated
Hospital, Xi’an Jiaotong University, Xi’an 710049, PR China
| | - Lu Lu
- Key Laboratory
of Applied Surface
and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical
Chemistry for Life Science of Shaanxi Province, School of Chemistry
and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, PR China
| | - Yunxia Qian
- Key Laboratory
of Applied Surface
and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical
Chemistry for Life Science of Shaanxi Province, School of Chemistry
and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, PR China
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16
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Zhao Y, Zhou F, Zhou H, Su H. The structural and bonding evolution in cysteine–gold cluster complexes. Phys Chem Chem Phys 2013; 15:1690-8. [DOI: 10.1039/c2cp42830j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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17
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Luque NB, Santos E. Ab initio studies of Ag-S bond formation during the adsorption of L-cysteine on Ag(111). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:11472-11480. [PMID: 22799749 DOI: 10.1021/la302376w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Ab initio studies of Ag-S bond formation during the adsorption of L-cysteine on Ag(111) have been performed by combining density functional theory with a quantum mechanical model developed in our group. The adsorbate-silver bond formation has been investigated by analyzing the projected density of states onto the different atoms of the molecule and by charge density difference calculations when the zwitterion radical approaches the surface. The polar character of the bond can be distinguished. For the first time, the coupling constants of the sulfur orbitals with the d and sp bands have been calculated by fitting the density of states. The role of the sp bands in the stabilization of the sulfur-silver bond is analyzed. The differences with the catalysis of hydrogen adsorption are discussed. Copper, gold, and silver are not good catalysts for the adsorption of hydrogen because of the position of the d bands lying too far below the Fermi level. However, the coin metals are excellent for the adsorption of thiols. The reason is that at the equilibrium position the sulfur atom is much farther from the surface than hydrogen, and thus the interactions with the sp bands stabilize its bond to the surface.
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Affiliation(s)
- N B Luque
- Institute of Theoretical Chemistry, Ulm University, Ulm, Germany
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18
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Romano E, Soria NAJ, Rudyk R, Brandán SA. Theoretical study of the infrared spectrum of 5-phenyl-1,3,4-oxadiazole-2-thiol by using DFT calculations. MOLECULAR SIMULATION 2012. [DOI: 10.1080/08927022.2011.640936] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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19
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Luque NB, Vélez P, Pötting K, Santos E. Ab initio studies of the electronic structure of L-cysteine adsorbed on Ag(111). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:8084-8099. [PMID: 22568393 DOI: 10.1021/la301107k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have performed ab initio calculations for the adsorption of L-cysteine on Ag(111) using density functional theory. We have focused on two possible adsorbed species: the L-cysteine radical (•S-CH(2)-CH-NH(2)-COOH) adsorbed almost flat at a bridge site, slightly displaced toward an fcc location, and the zwitterionic radical Z-cysteine (•S-CH(2)-CH-NH(3)(+)-COO(-)) adsorbed at a bridge site, shifted to a hcp site forming a (4 × 4) unit cell (θ = 0.06) and a (√3 × √3) R 30° unit cell (θ = 0.33), respectively. Special attention has been paid to the electronic structure of the system. The adsorbate-silver bond formation has been exhaustively investigated by analyzing the density of states projected onto the different atoms of the molecule, and by charge density difference calculations. A complicated interplay between sp and d states of silver in the formation of bonds between the adsorbates and the surface has been found. The role of the carboxyl group in the interaction with the surface has been also analyzed.
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Affiliation(s)
- N B Luque
- Instituto de Física Enrique Gaviola (IFEG-CONICET), Faculdad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba, Córdoba, Argentina
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20
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Luque NB, Santos E, Andres J, Tielens F. Effect of coverage and defects on the adsorption of propanethiol on Au(111) surface: a theoretical study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14514-14521. [PMID: 21970345 DOI: 10.1021/la202861s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Periodic density functional calculations have been carried out to investigate both the thiol adsorption on Au(111) surface and the reaction mechanism for the formation of the self-assembled monolayers, taking propanethiol as a representative example. The effect of coverage and surface defects (adatoms and vacancies) has been analyzed. It is found that the most stable physisorption (undissociated) site is an adatom site, whereas the chemisorption site for the thiol is a vacancy site or protrusion consisting of a pair of adatoms, followed by one adatom site. The results point out that the thiolate self-assembled monolayer adsorption process occurs preferentially on step edges.
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Affiliation(s)
- Noelia B Luque
- UPMC Univ Paris 06, Laboratoire de Réactivité de Surface, Casier 178, 4, Place Jussieu, F-75005 Paris, France
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21
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Avalle LB, Valle L. Riboflavin and flavin mononucleotide adsorption on Ag (111) electrodes and their interaction with l-cysteine investigated by electrochemical and non-linear optical methods. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.07.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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22
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23
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Smerieri M, Vattuone L, Costa D, Tielens F, Savio L. Self-assembly of (S)-glutamic acid on Ag(100): a combined LT-STM and ab initio investigation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7208-7215. [PMID: 20158258 DOI: 10.1021/la904331d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Self-assembly of organic molecules at metal surfaces is of greatest importance in nanoscience; in fact, it opens new perspectives in the field of molecular electronics and in the study of biocompatible materials. Combining an experimental low-temperature scanning tunneling microscopy investigation with ab initio calculations, we succeeded to describe in detail (S)-glutamic acid adsorption on Ag(100) at T = 350 K. We find that (S)-glutamic acid organizes in a squared structure and, at variance with the majority of cases reported in literature, it adsorbs in the neutral form, 4.6 A above the surface plane. The interaction with the poorly reactive Ag substrate is only due to weak van der Waals forces, while H-bonds between carboxyl groups and the formation of a OCOH-OCOH-OCOH-OCOH cycle at the vertex of the squares are the main responsible for the self-assembly.
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Affiliation(s)
- M Smerieri
- Dipartimento di Fisica dell'Università di Genova, Italy
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Yao H, Nishida N, Kimura K. Conformational study of chiral penicillamine ligand on optically active silver nanoclusters with IR and VCD spectroscopy. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2009.12.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Stripping chronopotentiometric analysis of cysteine on nano-silver coat polyquercetin–MWCNT modified platinum electrode. J Solid State Electrochem 2009. [DOI: 10.1007/s10008-009-0953-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zhang J, Chi Q, Nazmutdinov RR, Zinkicheva TT, Bronshtein MD. Submolecular electronic mapping of single cysteine molecules by in situ scanning tunneling imaging. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:2232-2240. [PMID: 19161269 DOI: 10.1021/la8034006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We have used L-cysteine (Cys) as a model system to study the surface electronic structures of single molecules at the submolecular level in aqueous buffer solution by a combination of electrochemical scanning tunneling microscopy (in situ STM), electrochemistry including voltammetry and chronocoulometry, and density functional theory (DFT) computations. Cys molecules were assembled on single-crystal Au(110) surfaces to form a highly ordered monolayer with a periodic lattice structure of c(2x2) in which each unit contains two molecules; this conclusion is confirmed by the results of calculations based on a slab model for the metal surface. The ordered monolayer offers a platform for submolecular scale electronic mapping that is an issue of fundamental interest but remains a challenge in STM imaging science and surface chemistry. Single Cys molecules were mapped as three electronic subunits contributed mainly from three chemical moieties: thiol (-SH), carboxylic (-COOH), and amine (-NH2) groups. The contrasts of the three subunits depend on the environment (e.g., pH), which affects the electronic structure of adsorbed species. From the DFT computations focused on single molecules, rational analysis of the electronic structures is achieved to delineate the main factors that determine electronic contrasts in the STM images. These factors include the molecular orientation, the chemical nature of the elements or groups in the molecule, and the interaction of the elements with the substrate and tip. The computational images recast as constant-current-height profiles show that the most favorable molecular orientation is the adsorption of cysteine as a radical in zwitterionic form located on the bridge between the Au(110) atomic rows and with the amine and carboxyl group toward the solution bulk. The correlation between physical location and electronic contrast of the adsorbed molecules was also revealed by the computational data. The present study shows that cysteine packing in the adlayer on Au(110) from the liquid environment is in contrast to that from the ultrahigh-vacuum environment, suggesting solvent plays a role during molecular assembly.
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Affiliation(s)
- Jingdong Zhang
- Department of Chemistry, NanoDTU, Building 207, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
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Hager G, Brolo AG. Protonation and deprotonation of cysteine and cystine monolayers probed by impedance spectroscopy. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2008.10.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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