1
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Doust Mohammadi M, Bhowmick S, Maisser A, Schmidt-Ott A, Biskos G. Electronic properties and collision cross sections of AgO kH m± ( k, m = 1-4) aerosol ionic clusters. Phys Chem Chem Phys 2024; 26:14547-14560. [PMID: 38721799 DOI: 10.1039/d3cp05499c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Experimental evidence shows that hydroxylated metal ions are often produced during cluster synthesis by atmospheric pressure spark ablation. In this work, we predict the ground state equilibrium structures of AgOkHm± clusters (k and m = 1-4), which are readily produced when spark ablating Ag, using the coupled cluster with singles and doubles (CCSD) method. The stabilization energy of these clusters is calculated with respect to the dissociation channel having the lowest energy, by accounting perturbative triples corrections to the CCSD method. The interatomic interactions in each of the systems have been investigated using the frontier molecular orbital (FMO), natural bond orbital (NBO) and quantum theory of atoms in molecules (QTAIM) methods. Many of the ground states of these ionic clusters are found to be stable, corroborating experimental observations. We find that clusters having singlet spin states are more stable in terms of dissociation than the clusters that have doublet or triplet spin states. Our calculations also indicate a strong affinity of the ionic and neutral Ag atom towards water and hydroxyl radicals or ions. Many 3-center, 4-electron (3c/4e) hyperbonds giving rise to more than one resonance structure are identified primarily for the anionic clusters. The QTAIM analysis shows that the O-H and O-Ag bonds in the clusters of both polarities are respectively covalent and ionic. The FMO analysis indicates that the anionic clusters are more reactive than the cationic ones. Using the cluster structures predicted by the CCSD method, we calculate the collision cross sections of the AgOkHm± family, with k and m ranging from 1 to 4, by the trajectory method. In turn, we predict the electrical mobilities of these clusters when suspended in helium at atmospheric pressure and compare them with experimental measurements.
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Affiliation(s)
- Mohsen Doust Mohammadi
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus.
| | - Somnath Bhowmick
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus.
| | - Anne Maisser
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus.
| | - Andreas Schmidt-Ott
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus.
- Faculty of Applied Sciences, Delft University of Technology, Delft, 2629 HZ, The Netherlands
| | - George Biskos
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus.
- Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, 2628 CN, The Netherlands
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2
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Hu J, Ma J, Jin Z, Liu W, Huang L, Wang X, Xing X. Reactivity of cationic silver clusters with O 2: a probe of interplay between clusters' geometric and electronic structures. Phys Chem Chem Phys 2024; 26:7407-7415. [PMID: 38351849 DOI: 10.1039/d3cp05082c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
We explored the size-dependent reactivity of Agn+ (n = 2-22) with O2 under mild conditions and found that only a few sizes of Agn+, with even values of n = 4, 6, 12, 16, 18, and 22, are reactive. Possible structures of Agn+ (n = 2-22) were determined using a genetic algorithm with incomplete local optimizations at the DFT level, and the calculated bonding strengths of O2 on these structures are consistent with experimental observations. Analyses revealed a close relationship between the reactivity of Agn+ with O2 and its HOMO-LUMO gap: cationic silver clusters with a small HOMO-LUMO gap are reactive, which can be rationalized by the covalent character of chemical bonds between Agn+ and O2 involving their frontier orbitals. The peculiar size-dependent HOMO-LUMO gaps and reactivity with O2 correlate with the subtle interplay between the electronic configurations and geometric structures of these silver cluster cations.
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Affiliation(s)
- Jin Hu
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Jun Ma
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Zhengqian Jin
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Wen Liu
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Lulu Huang
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Xuefeng Wang
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Xiaopeng Xing
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
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3
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R D, Sengupta T, Kumar D, Khanna SN. Effect of Ligand Attachment at Ag 11 for CO Oxidation: A Computational Investigation. J Phys Chem A 2023; 127:10766-10774. [PMID: 38095876 DOI: 10.1021/acs.jpca.3c04675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
Heterogeneous CO oxidation is a demanding reaction at room temperature due to the high activation energy required to break the O=O bond. While several metal clusters are reported to oxidize CO successfully, they fall short of their selectivity for the reaction and recyclability. In this regard, there is a need for economic catalysts with high catalytic activity, low activation barrier, and reusability. In this study, we have investigated the catalytic activity of the neutral pristine and ligated Ag11 cluster toward CO oxidation. We investigated the attachment effect of three organic donor ligands: trimethylphosphine, triethylphosphine, and N-ethyl pyrrolidone to the Ag11 cluster. Our results show that including donor ligands on the Ag11 cluster surface can significantly reduce the barrier heights for CO oxidation. The minimum barrier heights with the system coordinated with triethylphosphine showed the lowest activation barrier of 1.06 kcal/mol compared to the high activation barrier of 14.77 kcal/mol recorded for the pristine cluster. Exploration of the reaction mechanism and charge analysis showed that the electron donor ligands activate O2 via charge donation, thereby reducing the barrier heights of CO oxidation.
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Affiliation(s)
- Deeksha R
- Department of Chemistry, Faculty of Mathematical and Physical Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka 560058, India
| | - Turbasu Sengupta
- Physics Department, Virginia Commonwealth University, 701 W. Grace St., Richmond, Virginia 23284-2000, United States
| | - Deepak Kumar
- Department of Chemistry, Faculty of Mathematical and Physical Sciences, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka 560058, India
| | - Shiv N Khanna
- Physics Department, Virginia Commonwealth University, 701 W. Grace St., Richmond, Virginia 23284-2000, United States
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4
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Balan JL, Morato-Márquez JA, Torres-Torres JG, Cabellos JL, Ortiz-Chi F. Structural and optical properties of the Ag n-tyrosine complexes ( n = 3-12): a density functional theory study. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230908. [PMID: 38094276 PMCID: PMC10716649 DOI: 10.1098/rsos.230908] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 11/21/2023] [Indexed: 01/11/2024]
Abstract
We study the optical properties of Agn (n = 3-12) neutral clusters and their coordination with a tyrosine (Tyr) molecule. A global search strategy coupled with density functional theory (DFT) computations explored the potential energy surface. Adsorption energy calculations predicted that Tyr coordination stabilizes the metal clusters, favouring the Agn-Tyr complexes with an even number of silver atoms. For the Agn low-lying isomers, the general shape and the major transitions of the calculated time dependent-DFT (TD-DFT) absorption spectra align with those of previous reports measured in an argon environment. We use the analysis of non-covalent interactions to identify the specific interactions between each silver cluster and functional groups of Tyr. The TD-DFT absorption spectra for the Agn-Tyr complexes showed that Tyr significantly modifies the optical properties of the coordinated silver clusters and affects the smaller systems to a greater extent. The optical absorption results of the bare Agn clusters and the Agn-Tyr complexes are compared and discussed in detail.
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Affiliation(s)
- José Luis Balan
- División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco, Cunduacán 86690, Tabasco, México
| | - José Aminadat Morato-Márquez
- División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco, Cunduacán 86690, Tabasco, México
- Tecnológico Nacional de México, Instituto Tecnológico de Villahermosa, Departamento de Ciencias de la Tierra, Villahermosa, 86010, Tabasco, México
| | - José Gilberto Torres-Torres
- División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco, Cunduacán 86690, Tabasco, México
| | - José Luis Cabellos
- Universidad Politécnica de Tapachula, Coordinación de Investigación y Desarrollo Tecnológico, Tapachula 30830, Chiapas, México
| | - Filiberto Ortiz-Chi
- CONAHCYT-División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco, Cunduacán 86690, Tabasco, México
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5
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Rodríguez-Juárez A, Carmona-Álvarez V, Díaz-Monge F, Chigo-Anota E, Zaca-Moran O. Understanding of the Effect of the Adsorption of Atom and Cluster Silver on Chitosan: An In Silico Analysis. Molecules 2023; 28:5809. [PMID: 37570779 PMCID: PMC10421313 DOI: 10.3390/molecules28155809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/16/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
In this work, the structural, electronic, and optical stability properties of the chitosan monomer (M-Ch) and atomic silver complex are reported, as well as a unitary cell of a silver cluster in the gas phase and acetic acid. The generalized gradient approximation HSEh1PBE/def2-TZVPP50 results established the structures' anionic charge (Q = -1|e|) and the doublet state (M = 2). The high cohesive energy indicates structural stability, and the quantum-mechanical descriptors show a high polarity and low chemical reactivity. Also, the quantum-mechanical descriptors present a low work function that shows the structures are suitable for applications in light-emitting diodes. Finally, the electronic behavior observed by the |HOMO-LUMO| gap energy changes depending on the atomic silver incorporated into the complex.
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Affiliation(s)
- Alejandro Rodríguez-Juárez
- Tecnológico Nacional de México, ITS-Tlaxco, Predio Cristo Rey Ex-Hacienda de Xalostoc Carretera Apizaco-Tlaxco Km. 16.8, Centro, Tlaxco 90250, Mexico; (V.C.-Á.); (F.D.-M.)
| | - Veronica Carmona-Álvarez
- Tecnológico Nacional de México, ITS-Tlaxco, Predio Cristo Rey Ex-Hacienda de Xalostoc Carretera Apizaco-Tlaxco Km. 16.8, Centro, Tlaxco 90250, Mexico; (V.C.-Á.); (F.D.-M.)
| | - Fernando Díaz-Monge
- Tecnológico Nacional de México, ITS-Tlaxco, Predio Cristo Rey Ex-Hacienda de Xalostoc Carretera Apizaco-Tlaxco Km. 16.8, Centro, Tlaxco 90250, Mexico; (V.C.-Á.); (F.D.-M.)
| | - Ernesto Chigo-Anota
- Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, San Manuel, Puebla 72570, Mexico
| | - Orlando Zaca-Moran
- Instituto Politécnico Nacional, Centro de Investigación en Biotecnología Aplicada, Ex-Hacienda de San Juan Molino, Km 1.5 de la Carretera Estatal Santa Inés Tecuexcomac-Tepetitla, Tepetitla 90700, Mexico;
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6
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Mohammadi MD, Patsalidis N, Bhowmick S, Harmandaris VA, Biskos G. Adsorption of air pollutants onto silver and gold atomic clusters: DFT and PNO-LCCSD-F12 calculations. RSC Adv 2023; 13:18014-18024. [PMID: 37323454 PMCID: PMC10265589 DOI: 10.1039/d3ra01717f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/05/2023] [Indexed: 06/17/2023] Open
Abstract
We provide a comprehensive investigation of intermolecular interactions between atmospheric gaseous pollutants, including CH4, CO, CO2, NO, NO2, SO2, as well as H2O and Agn (n = 1-22) or Aun (n = 1-20) atomic clusters. The optimized geometries of all the systems investigated in our study were determined using density functional theory (DFT) with M06-2X functional and SDD basis set. The PNO-LCCSD-F12/SDD method was used for more accurate single-point energy calculations. Compared to their isolated states, the structures of the Agn and Aun clusters undergo severe deformations upon adsorption of the gaseous species, which become more significant as the size of the clusters decreases. Considering that, in addition to adsorption energy, we have determined the interaction and deformation energy of all the systems. All our calculations consistently show that among the gaseous species examined, SO2 and NO2 exhibit a higher preference for adsorption on both types of clusters, with a slightly higher preference for the Ag clusters compared to the Au clusters, with the SO2/Ag16 system exhibiting the lowest adsorption energy. The type of intermolecular interactions was investigated through wave function analyses, including natural bond orbital (NBO) and quantum theory of atoms in molecules (QTAIM), showing that NO2 and SO2 are chemisorbed on the Agn and Aun atomic clusters, whereas the other gas molecules exhibit a much weaker interaction with them. The reported data can be used as input parameters for molecular dynamics simulations to study the selectivity of atomic clusters towards specific gases under ambient conditions, as well as to design materials that take advantage of the studied intermolecular interactions.
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Affiliation(s)
| | - Nikolaos Patsalidis
- Computation-based Science and Technology Research Centre, The Cyprus Institute Nicosia 2121 Cyprus
| | - Somnath Bhowmick
- Climate and Atmosphere Research Centre, The Cyprus Institute Nicosia 2121 Cyprus
| | - Vagelis A Harmandaris
- Computation-based Science and Technology Research Centre, The Cyprus Institute Nicosia 2121 Cyprus
- Institute of Applied and Computational Mathematics (IACM), Foundation for Research and Technology Hellas, (FORTH), IACM/FORTH GR-71110 Heraklion Crete Greece
- Department of Mathematics and Applied Mathematics, University of Crete GR-71409 Heraklion Crete Greece
| | - George Biskos
- Climate and Atmosphere Research Centre, The Cyprus Institute Nicosia 2121 Cyprus
- Faculty of Civil Engineering and Geosciences, Delft University of Technology Delft 2628 CN The Netherlands
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7
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Liu W, Huang L, Meng L, Hu J, Xing X. The global minimum of Ag 30: a prolate spheroidal structure predicted using a genetic algorithm with incomplete local optimizations at the DFT level. Phys Chem Chem Phys 2023; 25:14303-14310. [PMID: 37183519 DOI: 10.1039/d3cp00791j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Genetic algorithms have been widely used to explore global minimum points of atomic clusters, and their incorporation with ab initio calculations (including density functional theory methods) as local optimization approaches increases their ability to accurately locate the global minimum points on complicated potential energy surfaces. However, the local optimizations using ab initio calculations significantly increase the computational cost relative to those based on empirical or semi-empirical calculations. Herein, we develop a genetic algorithm program with an incomplete local optimization strategy at the DFT level. Using several representative clusters as test examples, this program showed high efficiency in locating their global minimum points. The low-lying isomers of Ag30 were explored using this program, and the determined global minimum is a prolate spheroidal structure. The elongated spheroidal shape causes degeneracy lifting of the free electron shells, and endows Ag30 with a large HOMO-LUMO gap. The sharp increase of silver clusters' reactivity around the sizes with 30 valence electrons observed in our previous experiments could be correlated with this theoretical figure.
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Affiliation(s)
- Wen Liu
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Lulu Huang
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Lei Meng
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Jin Hu
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
| | - Xiaopeng Xing
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
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8
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Garg S, Kaur N, Goel N, Molayem M, Grigoryan VG, Springborg M. Properties of Naked Silver Clusters with Up to 100 Atoms as Found with Embedded-Atom and Density-Functional Calculations. Molecules 2023; 28:molecules28073266. [PMID: 37050029 PMCID: PMC10096883 DOI: 10.3390/molecules28073266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/27/2023] [Accepted: 03/31/2023] [Indexed: 04/14/2023] Open
Abstract
The structural and energetic properties of small silver clusters Agn with n = 2-100 atoms are reported. For n = 2-100 the embedded atom model for the calculation of the total energy of a given structure in combination with the basin-hopping search strategy for an unbiased structure optimization has been used to identify the energies and structures of the three energetically lowest-lying isomers. These optimized structures for n = 2-11 were subsequently studied further through density-functional-theory calculations. These calculations provide additional information on the electronic properties of the clusters that is lacking in the embedded-atom calculations. Thereby, also quantities related to the catalytic performance of the clusters are studied. The calculated properties in comparison to other available theoretical and experimental data show a good agreement. Previously unidentified magic (i.e., particularly stable) clusters have been found for n>80. In order to obtain a more detailed understanding of the structural properties of the clusters, various descriptors are used. Thereby, the silver clusters are compared to other noble metals and show some similarities to both copper and nickel systems, and also growth patterns have been identified. All vibrational frequencies of all the clusters have been calculated for the first time, and here we focus on the highest and lowest frequencies. Structural effects on the calculated frequencies were considered.
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Affiliation(s)
- Shivangi Garg
- Theoretical and Computational Chemistry Group, Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Navjot Kaur
- Department of Chemistry, Faculty of Science, SGT University, Gurugram 122505, India
| | - Neetu Goel
- Theoretical and Computational Chemistry Group, Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Mohammad Molayem
- Physical and Theoretical Chemistry, Department of Chemistry, University of Saarland, 66123 Saarbrücken, Germany
| | - Valeri G Grigoryan
- Physical and Theoretical Chemistry, Department of Chemistry, University of Saarland, 66123 Saarbrücken, Germany
| | - Michael Springborg
- Laboratory of Theoretical Chemistry, Department of Chemistry, Namur Institute of Structured Matter (NISM), University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
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9
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Mehta BR, Shah EV, Mondal Roy S, Roy DR. (ZnO)42 nanocluster: a novel visibly active magic quantum dot under first principle investigation. Theor Chem Acc 2023. [DOI: 10.1007/s00214-023-02958-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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10
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Bhowmick S, Maisser A, Suleimanov YV, Schmidt-Ott A, Biskos G. Electronic Structure, Stability, and Electrical Mobility of Cationic Silver Oxide Atomic Clusters. J Phys Chem A 2022; 126:6376-6386. [PMID: 36099558 DOI: 10.1021/acs.jpca.2c02809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Silver oxide cluster cations (AgnOm+) can readily be produced by a number of methods including atmospheric-pressure spark ablation of pure silver electrodes when trace amounts of oxygen are present in the carrier gas. Here we determine the equilibrium geometries of AgnOm+ clusters (n = 1-4; m = 1-5) using accurate coupled cluster with singles and doubles (CCSD) method, while the stabilization energies are calculated with additional perturbative triples correction (CCSD(T)). Although a number of stable states have been identified, our results show that the AgnOm+ clusters with m = 1 are more stable than those with m ≥ 2 due to the absence of the terminally attached O2 molecule, corroborating recent observations by mass spectrometry. Using the computed structures, we calculate the electrical mobilities of the AgnOm+ clusters and label the values on a respective experimentally determined spectrum in an attempt to better interpret the occurrence of the peaks and troughs in the measurements.
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Affiliation(s)
- Somnath Bhowmick
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus
| | - Anne Maisser
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus
| | - Yury V Suleimanov
- Computation-Based Science and Technology Research Center, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus
| | - Andreas Schmidt-Ott
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus.,Faculty of Applied Sciences, Delft University of Technology, Delft, 2629 HZ, The Netherlands
| | - George Biskos
- Climate & Atmosphere Research Centre, The Cyprus Institute, 20 Konstantinou Kavafi Street, Nicosia 2121, Cyprus.,Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, 2628 CN, The Netherlands
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11
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Sun Q, Gieseking RLM. Parametrization of the PM7 Semiempirical Quantum Mechanical Method for Silver Nanoclusters. J Phys Chem A 2022; 126:6558-6569. [PMID: 36082665 DOI: 10.1021/acs.jpca.2c05782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Semiempirical quantum mechanical methods (SEQMs) are widely used in computational chemistry because of their low computational cost, but their accuracy depends on the quality of the parameters. The neglect of diatomic differential overlap method PM7 is among the few SEQMs that contain parameters for Ag, but the experimental reference data was insufficient to obtain reliable parameters in the original parametrization. In this work, we reparametrize the PM7 parameters for Ag to accurately reproduce the ground-state potential energy surfaces of Ag clusters. Since little experimental data is available, we use reference data obtained from the ab initio method CCSD(T). The resulting parameters significantly reduce the errors in binding energies, energies required to displace clusters along their normal modes, and relative energies of isomers compared to the default PM7 Ag parameters.
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Affiliation(s)
- Qiwei Sun
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
| | - Rebecca L M Gieseking
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
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12
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Fernández EM, Balbás LC. Interactions of Nitric Oxide Molecules with Pure and Oxidized Silver ClustersAg n{plus minus}/Ag nO {plus minus} (n=11-13). A Computational Study. J Chem Phys 2022; 157:074310. [DOI: 10.1063/5.0094996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this work we studied, within DFT, the interaction of NO with pure and oxidized Agn, both anionic and cationic, composed from11 to 13 Ag atoms. In that size interval, shell closing effects are not expected, and structural and electronic odd-even effects will determine the strength of interaction. We obtained that species Agn{plus minus} and AgnO{plus minus} with odd number of electrons (n=12) adsorb NO with higher energy than their neighbours. This result agrees with the facts observed in recent mass spectroscopy measurements, which were performed at finite temperature. The adsorption energy is about twice for oxidized clusters compared to pure ones, and higher for anions than for cations. The adsorption of another NO molecule on AgnNO{plus minus} forms Agn(NO)2{plus minus}, with the dimer (NO)2 in cis configuration, and binding the two N atoms with two neigbour Ag atoms. The n=12 show the higher adsorption energy again. In absence of reaction barriers, Agn(NO)2{plus minus} dissociate spontaneously into AgnO{plus minus} and N2O, except the n= 12 anion. The máximum high barrier along the dissociation path of Ag13(NO)2- is about 0.7 eV. Further analysis of PDOS for Ag11-13 (NO)x{plus minus} (x=0,1,2) molecules shows that bonding between NO and Agn mainly occurs in the range between -3.0 eV and 3.0 eV. The overlap between 4 d of Ag and 2 p of N and O is larger for Ag12(NO)2{plus minus} than for neighbour sizes. For n=12, the d bands are close to the (NO)2 2π orbital, leading to extra back-donation charge from the 4 d of Ag to the closer 2π orbital of (NO)2.
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Affiliation(s)
- Eva M. Fernández
- Fisica Fundamental, Universidad Nacional de Educación a Distancia, Spain
| | - Luis Carlos Balbás
- Departamento de Física Teórica, Atómica y Óptica, University of Valladolid - Miguel Delibes Campus, Spain
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13
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Ligand accommodation causes altered reactivity of silver clusters with iodomethane: superatomic stability of Ag9I2+ in mimicking XeF2. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1297-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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14
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Lacaze-Dufaure C, Bulteau Y, Tarrat N, Loffreda D, Fau P, Fajerwerg K, Kahn ML, Rabilloud F, Lepetit C. Coordination of Ethylamine on Small Silver Clusters: Structural and Topological (ELF, QTAIM) Analyses. Inorg Chem 2022; 61:7274-7285. [PMID: 35485936 DOI: 10.1021/acs.inorgchem.1c03870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Amine ligands are expected to drive the organization of metallic centers as well as the chemical reactivity of silver clusters early growing during the very first steps of the synthesis of silver nanoparticles via an organometallic route. Density functional theory (DFT) computational studies have been performed to characterize the structure, the atomic charge distribution, and the planar two-dimensional (2D)/three-dimensional (3D) relative stability of small-size silver clusters (Agn, 2 ≤ n ≤ 7), with or without an ethylamine (EA) ligand coordinated to the Ag clusters. The transition from 2D to 3D structures is shifted from n = 7 to 6 in the presence of one EA coordinating ligand, and it is explained from the analysis of the Ag-N and Ag-Ag bond energies. For fully EA saturated silver clusters (Agn-EAn), the effect on the 2D/3D transition is even more pronounced with a shift between n = 4 and 5. Subsequent electron localization function (ELF) and quantum theory of atoms in molecules (QTAIM) topological analyses allow for the fine characterization of the dative Ag-N and metallic Ag-Ag bonds, both in nature and in strength. Electron transfer from ethylamine to the coordinated silver atoms induces an increase of the polarization of the metallic core.
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Affiliation(s)
- Corinne Lacaze-Dufaure
- CIRIMAT, Université de Toulouse, CNRS, INP─ENSIACET 4 allée Emile Monso─BP44362, 31030 Toulouse cedex, France
| | - Yann Bulteau
- CIRIMAT, Université de Toulouse, CNRS, INP─ENSIACET 4 allée Emile Monso─BP44362, 31030 Toulouse cedex, France
| | - Nathalie Tarrat
- CEMES, Université de Toulouse, CNRS, 29 rue Jeanne Marvig, 31055 Toulouse, France
| | - David Loffreda
- Laboratoire de Chimie, Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, F-69342 Lyon, France
| | - Pierre Fau
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 31077 Toulouse Cedex 04, France
| | - Katia Fajerwerg
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 31077 Toulouse Cedex 04, France
| | - Myrtil L Kahn
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 31077 Toulouse Cedex 04, France
| | - Franck Rabilloud
- Institut Lumière Matière, Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, F-69622 Villeurbanne, France
| | - Christine Lepetit
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 31077 Toulouse Cedex 04, France
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15
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Hariharan A, Kurnoothala R, Chinthakayala SK, Vishnubhatla KC, Vadlamudi P. SERS of Dopamine: Computational and experimental studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 260:119962. [PMID: 34044193 DOI: 10.1016/j.saa.2021.119962] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 03/27/2021] [Accepted: 05/12/2021] [Indexed: 06/12/2023]
Abstract
Computational and experimental studies have been carried out on Dopamine. The calculated Raman spectra of Dopamine with and without Silver clusters (Agn (n = 1-4)) are compared with each other and it is shown that the intensity of the Raman activity increases with increasing number of silver atoms. The SERS effect shown by this system is further supported by calculating the Global electrophilicity index ω, the static mean polarizability α0, and the anisotropy of the polarizabilities Δα. Stabilities of the complexes are analysed using the charge transfer, stabilization energies, and interaction energies. The reactive parameters for these complexes were further supported by looking at the molecular electrostatic potential (MESP) surfaces. SERS substrates were fabricated by sintering silver nanoparticle paste onto a fused silica substrate, using a femtosecond laser. Detection of Dopamine up to 1 μM is reported using the SERS substrates.
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Affiliation(s)
- Abishek Hariharan
- Department of Physics, Sri Sathya Sai Institute of Higher Learning (SSSIHL), BRN campus, Bangalore, Karnataka 560067, India
| | - Rajasimha Kurnoothala
- Department of Physics, SSSIHL, PSN campus, Puttaparthi, A.P. 515134, India; FabULLAS, FemtoFab, Central Research Instruments Facility, SSSIHL, PSN campus, Puttaparthi, A.P. 515134, India
| | | | - Krishna Chaitanya Vishnubhatla
- Department of Physics, SSSIHL, PSN campus, Puttaparthi, A.P. 515134, India; FabULLAS, FemtoFab, Central Research Instruments Facility, SSSIHL, PSN campus, Puttaparthi, A.P. 515134, India
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16
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Bhagowati P, Saikia U, Sahariah MB. Low-energy structures and electronic properties of small titanium nitride nanoclusters. NANOTECHNOLOGY 2021; 32:505718. [PMID: 34551399 DOI: 10.1088/1361-6528/ac291b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Some small nanoclusters of plasmonically superior titanium nitride are generated usingab initiomolecular dynamics simulation under the regime of density functional theory. The global minima structures of TiN lack symmetry in the local environment as compared to the bulk counterpart. Electronic properties, namely Bader charge, electron localization function, and density of states, help us to have a deeper understanding of these nanoclusters. In all the calculations, bulk TiN has been taken as a reference to compare the properties. It has been observed that with an increasing number of atoms in the nanoclusters, they tend to show properties similar to bulk TiN, indicating that they might as well be used as plasmonic materials.
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Affiliation(s)
- Purbajyoti Bhagowati
- Institute of Advanced Study in Science and Technology, Guwahati, Assam-781035, India
| | - Ujjal Saikia
- Institute of Advanced Study in Science and Technology, Guwahati, Assam-781035, India
| | - Munima B Sahariah
- Institute of Advanced Study in Science and Technology, Guwahati, Assam-781035, India
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17
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Shtepliuk I, Yakimova R. Computational Appraisal of Silver Nanocluster Evolution on Epitaxial Graphene: Implications for CO Sensing. ACS OMEGA 2021; 6:24739-24751. [PMID: 34604656 PMCID: PMC8482456 DOI: 10.1021/acsomega.1c03577] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Indexed: 05/10/2023]
Abstract
Early stages of silver nucleation on a two-dimensional (2D) substrate, here, monolayer epitaxial graphene (MEG) on SiC, play a critical role in the formation of application-specific Ag nanostructures. Therefore, it is of both fundamental and practical importance to investigate the growth steps when Ag adatoms start to form a new phase. In this work, we exploit density functional theory to study the kinetics of early-stage nuclei Ag n (n = 1-9) assembly of Ag nanoparticles on MEG. We find that the Ag1 monomer tends to occupy hollow site positions of MEG and interacts with the surface mainly through weak dispersion forces. The pseudoepitaxial growth regime is revealed to dominate the formation of the planar silver clusters. The adsorption and nucleation energies of Ag n clusters exhibit evident odd-even oscillations with cluster size, pointing out the preferable adsorption and nucleation of odd-numbered clusters on MEG. The character of the interaction between a chemisorbed Ag3 cluster and MEG makes it possible to consider this trimer as the most stable nucleus for the subsequent growth of Ag nanoparticles. We reveal the general correlation between Ag/MEG interaction and Ag-Ag interaction: with increasing cluster size, the interaction between Ag adatoms increases, while the Ag/MEG interaction decreases. The general trend is also supported by the results of charge population analysis, according to which the average charge per Ag adatom in a Ag n cluster demonstrates a drastic decrement with cluster size increase. 2D-3D structural transition in Ag n clusters was investigated. We anticipate that the present investigation is beneficial by providing a better understanding of the early-stage nucleation of Ag nanoparticles on MEG at the atomic scale. Specific interaction between odd-numbered Ag clusters preadsorbed onto the MEG surface and carbon monoxide (CO) as well as clusters' stability at 300 K is discussed in terms of sensing applications.
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Affiliation(s)
- Ivan Shtepliuk
- Department of Physics, Chemistry and
Biology-IFM, Linköpings Universitet, 58183 Linköping, Sweden
| | - Rositsa Yakimova
- Department of Physics, Chemistry and
Biology-IFM, Linköpings Universitet, 58183 Linköping, Sweden
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18
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Rodríguez-Kessler PL, Rodríguez-Domínguez AR, MacLeod-Carey D, Muñoz-Castro A. Reply to 'Comment on "Structural characterization, reactivity, and vibrational properties of silver clusters: A new global minimum for Ag 16"' by P. V. Nhat, N. T. Si, L. V. Duong and M. T. Nguyen, Phys. Chem. Chem. Phys., 2021, 23, DOI: D1CP00646K. Phys Chem Chem Phys 2021; 23:12904-12906. [PMID: 34042926 DOI: 10.1039/d1cp01481a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, P. V. Nhat et al., have discussed and commented on our article (DOI: 10.1039/D0CP04018E) for the case of the most stable structure of Ag15. They have found a new most stable structure (labeled as 15-1) in comparison to the putative global minimum reported by us, which is a four layered 1-4-6-4 stacking structure with a C2v point group (15-2). In this reply, we have performed a larger structure search which allowed us to confirm the results of Nhat et al. The results show the existence of multiple isoenergetic isomers with similar structure motifs for the Ag15 system, increasing the problem complexity to locate the global minimum. The results in regard to the structure and electronic properties of the new lowest energy structure are discussed.
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Affiliation(s)
- Peter L Rodríguez-Kessler
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autónoma de Chile, El Llano Subercaseaux 2810, Santiago, Chile.
| | | | - Desmond MacLeod-Carey
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autónoma de Chile, El Llano Subercaseaux 2810, Santiago, Chile.
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autónoma de Chile, El Llano Subercaseaux 2810, Santiago, Chile.
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Nhat PV, Si NT, Duong LV, Nguyen MT. Comment on 'Structural characterization, reactivity and vibrational properties of silver clusters: a new global minimum for Ag 16' by P. L. Rodríguez-Kessler, A. R. Rodríguez-Domínguez, D. MacLeod Carey and A. Muñoz-Castro, Phys. Chem. Chem. Phys., 2020, 22, 27255, DOI: D0CP04018E. Phys Chem Chem Phys 2021; 23:12900-12903. [PMID: 34042917 DOI: 10.1039/d1cp00646k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A recent paper by Rodríguez-Kessler et al., Phys. Chem. Chem. Phys., 2020, 22, 27255-27262, reported not only results of quantum chemical computations (using the PW91 density functional) on Ag16 clusters as emphasized in the article's title, but also on the Ag15 size. These authors confirmed previous results obtained by McKee and Samokhvalov (J. Phys. Chem. A, 2017, 121, 5018-5028 using the M06 density functional) that the most stable isomer of Ag15 is a C2v structure. We wish to point out that two low symmetry isomers of Ag15 that have a similar energy content are even lower in energy than their reported C2v global minimum. The relative energies between low-lying Ag15 isomers were again found to be method-dependent, and within the expected accuracy of DFT and CCSD(T) methods they could be considered as energetically degenerate, and likely coexist in a molecular beam. The new lower-energy Ag15 isomers appear to fit more consistently within the structural evolution of small silver clusters.
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Affiliation(s)
- Pham Vu Nhat
- Department of Chemistry, Can Tho University, Can Tho, Vietnam.
| | - Nguyen Thanh Si
- Department of Chemistry, Can Tho University, Can Tho, Vietnam.
| | - Long Van Duong
- Institute for Computational Science and Technology (ICST), Ho Chi Minh City, Vietnam.
| | - Minh Tho Nguyen
- Institute for Computational Science and Technology (ICST), Ho Chi Minh City, Vietnam.
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20
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Vu Nhat P, Si NT, Tien NT, Nguyen MT. Theoretical Study of the Binding of the Thiol-Containing Cysteine Amino Acid to the Silver Surface Using a Cluster Model. J Phys Chem A 2021; 125:3244-3256. [PMID: 33861072 DOI: 10.1021/acs.jpca.0c11182] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Computational approaches within the framework of density functional theory (DFT) were employed to elucidate the binding mechanism of the cysteine amino acid on silver nanoparticles using several small silver clusters Agn with n = 2-10 as surface models. The long-range corrected LC-BLYP functional and correlation consistent basis sets cc-pVTZ-PP and cc-pVTZ were used to determine the structural features, energetics, and spectroscopic and electronic properties of the resulting complexes. In vacuum and highly acidic conditions, cysteine molecules prefer to adsorb on silver clusters via their amine group. In aqueous solution, the thiolate head turns out to be the most energetically favorable binding site. The cysteine affinity of silver clusters is greatly altered in different conditions, i.e., acidic solution < vacuum < aqueous solution, and is strongly dependent on the cluster size. As compared to free clusters, the frontier orbital energy gap of the ones capped by cysteine is significantly improved, which corresponds to stronger stability, especially in aqueous solution. The analysis of frontier orbitals also reveals that both forward and backward electron donations exhibit comparable contributions to the enhancement of stabilizing interactions. As for an application, a chemical enhancement mechanism of the surface-enhanced Raman scattering (SERS) procedure of cysteine by silver clusters was also analyzed.
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Affiliation(s)
- Pham Vu Nhat
- Department of Chemistry, Can Tho University, Can Tho 900000, Vietnam
| | - Nguyen Thanh Si
- Computational Chemistry Research Group, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam.,Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
| | | | - Minh Tho Nguyen
- Computational Chemistry Research Group, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam.,Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
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21
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Bérard R, Makasheva K, Demyk K, Simon A, Reyes DN, Mastrorocco F, Sabbah H, Joblin C. Impact of metals on (star)dust chemistry: a laboratory astrophysics approach. FRONTIERS IN ASTRONOMY AND SPACE SCIENCES 2021; 8:654879. [PMID: 33850840 PMCID: PMC7610582 DOI: 10.3389/fspas.2021.654879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Laboratory experiments are essential in exploring the mechanisms involved in stardust formation. One key question is how a metal is incorporated into dust for an environment rich in elements involved in stardust formation (C, H, O, Si). To address experimentally this question we have used a radiofrequency cold plasma reactor in which cyclic organosilicon dust formation is observed. Metallic (silver) atoms were injected in the plasma during the dust nucleation phase to study their incorporation in the dust. The experiments show formation of silver nanoparticles (~15 nm) under conditions in which organosilicon dust of size 200 nm or less is grown. The presence of AgSiO bonds, revealed by infrared spectroscopy, suggests the presence of junctions between the metallic nanoparticles and the organosilicon dust. Even after annealing we could not conclude on the formation of silver silicates, emphasizing that most of silver is included in the metallic nanoparticles. The molecular analysis performed by laser mass spectrometry exhibits a complex chemistry leading to a variety of molecules including large hydrocarbons and organometallic species. In order to gain insights into the involved chemical molecular pathways, the reactivity of silver atoms/ions with acetylene was studied in a laser vaporization source. Key organometallic species, Ag n C2H m (n=1-3; m=0-2), were identified and their structures and energetic data computed using density functional theory. This allows us to propose that molecular Ag-C seeds promote the formation of Ag clusters but also catalyze hydrocarbon growth. Throughout the article, we show how the developed methodology can be used to characterize the incorporation of metal atoms both in the molecular and dust phases. The presence of silver species in the plasma was motivated by objectives finding their application in other research fields than astrochemistry. Still, the reported methodology is a demonstration laying down the ground for future studies on metals of astrophysical interest such as iron.
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Affiliation(s)
- Rémi Bérard
- IRAP, Université de Toulouse, CNRS, UPS, CNES, TOULOUSE, France
- LAPLACE, Université de Toulouse, CNRS, UPS, INPT, TOULOUSE, France
| | | | - Karine Demyk
- IRAP, Université de Toulouse, CNRS, UPS, CNES, TOULOUSE, France
| | - Aude Simon
- LCPQ-IRSAMC, Université de Toulouse, UPS, CNRS, TOULOUSE, France
| | | | | | - Hassan Sabbah
- IRAP, Université de Toulouse, CNRS, UPS, CNES, TOULOUSE, France
- LCAR-IRSAMC, Université de Toulouse, UPS, CNRS, TOULOUSE, France
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22
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Kumari G, Kamarudheen R, Zoethout E, Baldi A. Photocatalytic Surface Restructuring in Individual Silver Nanoparticles. ACS Catal 2021; 11:3478-3486. [PMID: 33859867 PMCID: PMC8034772 DOI: 10.1021/acscatal.1c00478] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/18/2021] [Indexed: 12/15/2022]
Abstract
![]()
Light absorption
and scattering by metal nanoparticles can drive
catalytic reactions at their surface via the generation of hot charge
carriers, elevated temperatures, and focused electromagnetic fields.
These photoinduced processes can substantially alter the shape, surface
structure, and oxidation state of surface atoms of the nanoparticles
and therefore significantly modify their catalytic properties. Information
on such local structural and chemical change in plasmonic nanoparticles
is however blurred in ensemble experiments, due to the typical large
heterogeneity in sample size and shape distributions. Here, we use
single-particle dark-field and Raman scattering spectroscopy to elucidate
the reshaping and surface restructuring of individual silver nanodisks
under plasmon excitation and during photocatalytic CO2 hydrogenation.
We show that silver nanoparticles reshape significantly in inert N2 atmosphere, due to photothermal effects. Furthermore, by
collecting the inelastic scattering during laser irradiation in a
reducing gas environment, we observe intermittent light emission from
silver clusters transiently formed at the nanoparticle surface. These
clusters are likely to modify the photocatalytic activity of silver
nanodisks and to enable detection of reaction products by enhancing
their Raman signal. Our results highlight the dynamic nature of the
catalytic surface of plasmonic silver nanoparticles and demonstrate
the power of single-particle spectroscopic techniques to unveil their
structure–activity relationship both in situ and in real time.
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Affiliation(s)
- Gayatri Kumari
- DIFFER—Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ Eindhoven, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, De Zaale, 5600 MB Eindhoven, The Netherlands
| | - Rifat Kamarudheen
- DIFFER—Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ Eindhoven, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, De Zaale, 5600 MB Eindhoven, The Netherlands
| | - Erwin Zoethout
- DIFFER—Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ Eindhoven, The Netherlands
| | - Andrea Baldi
- DIFFER—Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ Eindhoven, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, De Zaale, 5600 MB Eindhoven, The Netherlands
- Department of Physics and Astronomy, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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25
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Li HS, Wei D, Zhao X, Ren X, Zhang D, Ju W. Thermal Stability of Ag 13- Clusters Studied by Ab Initio Molecular Dynamics Simulations. J Phys Chem A 2020; 124:4325-4332. [PMID: 32390419 DOI: 10.1021/acs.jpca.0c00277] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Identification of the geometric structures of silver clusters is of great importance in future nanotechnologies due to their superior properties. Nevertheless, some ground-state structures are still in academic debate, partly because the experiments and theoretical calculations are not performed at the same temperatures. For example, silver clusters usually have compact configurations. However, a combined experimental and theoretical study proposed that the most stable structure of Ag13- had a two-coordinated atom. By using the CALYPSO approach for the global minima search followed by first-principles calculations, we discovered that a more compact trilayer Ag13- cluster was the ground state, in accordance with another three works published recently. In addition, its O2 adsorption structure is also energetically favored. By tracing characteristic bond changes in ab initio molecular dynamics (MD) simulations, we confirmed that, compared with other isomers, this trilayer structure and its O2 adsorption structure also had the highest thermal stability. This work emphasized the thermal stability concept in theoretical calculations, which may be a necessary supplement to explain the experimental observations on cluster science.
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Affiliation(s)
- Hai-Sheng Li
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang City 471023, Henan Province, China
| | - Donghui Wei
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan Province, P. R. China
| | - Xingju Zhao
- Department of Physics, Beijing Normal University, Beijing 100875, P.R. China
| | - Xiaoyan Ren
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Dawei Zhang
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang City 471023, Henan Province, China
| | - Weiwei Ju
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang City 471023, Henan Province, China
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26
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Pchelkin VP. Calculations of the Hydrophobicity of Lipid Molecules by the Elution Strength of the Chromatographic Solvent. JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1134/s1061934820050159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Contreras-Torres FF. Dispersion-Corrected Density Functional Theory Study of the Noncovalent Complexes Formed with Imidazo[1,2- a]pyrazines Adsorbed onto Silver Clusters. ACS OMEGA 2020; 5:561-569. [PMID: 31956803 PMCID: PMC6964303 DOI: 10.1021/acsomega.9b03127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 12/13/2019] [Indexed: 06/10/2023]
Abstract
Imidazo[1,2-a]pyrazines are cyclic amidine-type compounds composed of α-amino acid residues. A full structural identification of these molecules constitutes an analytical challenge, especially when imidazo[1,2-a]pyrazines are obtained from physical processes (e.g., sublimation and pyrolysis of amino acids). A valuable source of molecular information can be obtained from absorption spectroscopies and related techniques encompassing the use of metallic substrates. The aim of this study is to provide new knowledge and insights into the noncovalent intermolecular interactions between imidazo[1,2-a]pyrazines and two Ag n (n = 4 and 20) clusters using density functional theory (DFT) methods. Semiempirical DFT dispersion (DFT-D) corrections were addressed using Grimme's dispersion (GD2) and Austin-Petersson-Frisch (APF) functionals in conjunction with the 6-31+G(d,p) + LANL2DZ mixed basis set. These DFT-D methods describe strong interactions; besides, in all cases, the APF dispersion (APF-D) energies of interaction appear to be consistently overestimated. In comparison with B3LYP calculations, the mean values for the difference in the energies of interaction calculated are 2.25 (GD2) and 6.24 (APF-D) kcal mol-1 for Ag4-molecules, and 2.30 (GD2) and 8.53 (APF-D) kcal mol-1 for Ag20-molecules. The effect of applying GD2 and APF-D corrections to the noncovalent complexes is nuanced in the intermolecular distances calculated, mainly in the Ag···N(amidine) bonding, which appears to play the most important role for the adsorptive process. Selective enhancement and considerable red shifts for Raman vibrations suggest strong interactions, whereas a charge redistribution involving the metallic substrate and the absorbate leads to a significant rearrangement of frontier molecular orbitals mainly in the Ag20-molecule complexes. Finally, time-dependent DFT calculations were carried out to access the orbital contributions to each of the transitions observed in the absorption spectrum. The corresponding UV-vis spectra involve transitions in the visible region at around 400 and 550 nm for the Ag4-molecule and the Ag20-molecule complexes, respectively.
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Wang C, Yang Y, Liu X, Li Y, Song D, Tian Y, Zhang Z, Shen X. Dissociative chemisorption of O2 on Agn and Agn−1Ir (n = 3–26) clusters: a first-principle study. Phys Chem Chem Phys 2020; 22:9053-9066. [DOI: 10.1039/d0cp01005g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lower dissociation barriers and higher reaction rates of O2 on doped Agn−1Ir clusters, and a gradually weakened dopant effect.
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Affiliation(s)
- Chuangchuang Wang
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Yongpeng Yang
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Xiaojing Liu
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Yuanjie Li
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Dandan Song
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Yun Tian
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Zhaojun Zhang
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical Computational Chemistry
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- People's Republic of China
| | - Xiangjian Shen
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical Computational Chemistry
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Liu T, Li Y, Liang C. The adsorption and growth of Ag n ( n = 1–4) clusters on cubic, monoclinic, and tetragonal ZrO 2 surfaces: a first-principles study. NEW J CHEM 2020. [DOI: 10.1039/c9nj03769a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The adsorption and growth of silver clusters on different zirconia surfaces.
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Affiliation(s)
- Tingting Liu
- School of Petroleum and Chemical Engineering
- Dalian University of Technology
- Panjin
- P. R. China
| | - Yan Li
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan 114051
- P. R. China
| | - Changhai Liang
- School of Petroleum and Chemical Engineering
- Dalian University of Technology
- Panjin
- P. R. China
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30
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Salaev MA, Salaeva AA, Poleschuk OK, Vodyankina OV. Re- and Cs-Copromoted Silver Catalysts for Ethylene Epoxidation: A Theoretical Study. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619110039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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31
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Fernández EM, Balbás LC. Study of odd-even effects in physisorption and chemisorption of Ar, N 2, O 2 and NO on open shell Ag 11-13+ clusters by means of self-consistent van der Waals density functional calculations. Phys Chem Chem Phys 2019; 21:25158-25174. [PMID: 31693027 DOI: 10.1039/c9cp04865k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have studied the adsorption and coadsorption properties of one or more X = Ar, N2, O2, and NO adsorbates on cationic silver clusters Ag11-13+, whose sizes are in the open shell region of metal clusters, aiming to understand the observed odd-even effects in the abundance spectra of Ag11-13+·mX complexes. All calculations were performed self-consistently using a non-local van der Waals correlation functional, covering the different nature of the interactions between the silver substrate and the several adsorbates, which range from dispersion (London) forces for Ar, non covalent π-π interactions for N2, charge-transfer interactions for O2 and NO, and the covalent Ag-Ag bond in the nude silver cluster. Despite the wide interval of adsorption energies, spanning two orders of magnitude, we have been able to explain the following experimental facts. For X = Ar, N2, and O2 reactions with Ag11-13+, it was observed in the mass spectra an abundance peak at n = 12 [M. Schmidt, et al., ChemPhysChem, 2015, 16, 855]. In addition it was observed the competitive adsorption of two or more N2 molecules, and the cooperative effect of adsorbing N2 together with O2 molecules. For X = NO, an abundance peak at n = 12 has been also observed [J. Ma, et al., Phys. Chem. Chem. Phys., 2016, 18, 12819]. We find that the main factors determining these properties are the different core motifs of the cluster geometry (pentagonal bipiramid for Ag11+ and Ag13+, but triangular prism for Ag12+) and, on the other hand, the odd number of valence electrons for Ag12+, leading to a smaller HOMO-LUMO gap than those of its neighbours. Further details about the preferred adsorption sites, dipole moments, and dipole polarizabilities are also discussed.
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Affiliation(s)
- Eva M Fernández
- Departamento de Física Fundamental, Universidad Nacional de Educación a Distancia, Madrid, Spain.
| | - Luis C Balbás
- Departamento de Física Teórica, Universidad de Valladolid, 47011 Valladolid, Spain
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32
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Wasukan N, Kuno M, Maniratanachote R. Molecular Docking as a Promising Predictive Model for Silver Nanoparticle-Mediated Inhibition of Cytochrome P450 Enzymes. J Chem Inf Model 2019; 59:5126-5134. [PMID: 31714078 DOI: 10.1021/acs.jcim.9b00572] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Cytochrome P450 (CYP) enzymes are responsible for oxidative metabolisms of a large number of xenobiotics. In this study, we investigated interactions of silver nanoparticles (AgNPs) and silver ions (Ag+) with six CYP isoforms, namely, CYP1A2, CYP2C9, CYP2C19, CYP2D6, CYP2E1, and CYP3A4, within CYP-specific inhibitor-binding pockets by molecular docking and quantum mechanical (QM) calculations. The docking results revealed that the Ag3 cluster, not Ag+, interacted with key amino acids of CYP2C9, CYP2C19, and CYP2D6 within a distance of about 3 Å. Moreover, the QM analysis confirmed that the amino acid residues of these CYP enzymes strongly interacted with the Ag3 cluster, providing more insight into the mechanism of the potential inhibition of CYP enzyme activities. Interestingly, these results are consistent with previous in vitro data indicating that AgNPs inhibited activities of CYP2C and CYP2D in rat liver microsomes. It is suggested that the Ag3 cluster is a minimal unit of AgNPs for in silico modeling. In summary, we demonstrated that molecular docking, together with QM analysis, is a promising tool to predict AgNP-mediated CYP inhibition. These methods are useful for deeper understanding of reaction mechanisms and could be used for other nanomaterials.
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Affiliation(s)
- Nootcharin Wasukan
- National Science and Technology Development Agency (NSTDA) , 111 Thailand Science Park , Khlong Luang , Pathum Thani 12120 , Thailand
| | - Mayuso Kuno
- Department of Chemistry, Faculty of Science , Srinakharinwirot University , Sukhumwit 23 , Wattana District, Bangkok 10110 , Thailand
| | - Rawiwan Maniratanachote
- National Science and Technology Development Agency (NSTDA) , 111 Thailand Science Park , Khlong Luang , Pathum Thani 12120 , Thailand
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33
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Ahuja P, Molayem M, Gadre SR. Electrostatics-Assisted Building-Up Procedure for Capturing Energy Minima of Metal Clusters: Test Case of Ag n Clusters. J Phys Chem A 2019; 123:7872-7880. [PMID: 31433180 DOI: 10.1021/acs.jpca.9b05601] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Global geometry optimization of metal clusters is an important problem in nanophysics. The starting geometries of the clusters generated with empirical or other model potentials are generally optimized further by density functional theory (DFT)-based energy minimization. For this purpose, several algorithms such as simulated annealing, genetic algorithms, basin hopping, etc. are used. Our building-up procedure generates putative lower-energy structures of metal (M) clusters, Mn+1, Mn+2, etc., by anchoring one or more metal atoms in the vicinity of the minima of the molecular electrostatic potential (MESP) of Mn. Here, we report an application of this method to Agn clusters, for 5 ≤ n ≤ 20, followed up by DFT-based geometry optimization, generating several lower-energy structures than those reported in the literature. New low-energy isomers are obtained by applying the same procedure to the test case of mixed-metal clusters, NinAgm, for n + m = 4 and 5. In conclusion, our MESP-based building-up procedure offers a new general methodology for generating lower-energy geometries of metal clusters.
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Affiliation(s)
- Prateek Ahuja
- Department of Chemical Sciences , IISER Mohali , Sector-81, Mohali 140306 , India
| | - Mohammad Molayem
- Physical and Theoretical Chemistry , Saarland University , Saarbrücken 66123 , Germany
| | - Shridhar R Gadre
- Interdisciplinary School of Scientific Computing and Department of Chemistry , Savitribai Phule Pune University , Pune 411007 , India
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34
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Nhat PV, Si NT, Nguyen MT. Comment on "Theoretical Investigations on Geometrical and Electronic Structures of Silver Clusters". J Comput Chem 2019; 40:1990-1993. [PMID: 31063638 DOI: 10.1002/jcc.25849] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/13/2019] [Accepted: 04/16/2019] [Indexed: 11/11/2022]
Abstract
We would like to make a few comments on the results reported in a recent paper in this journal by Tsuneda, J. Comput. Chem, 2019, 40, 206. The structures of some pure silver clusters were not correctly assigned. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Pham Vu Nhat
- Computational Chemistry Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Nguyen Thanh Si
- Department of Chemistry, Can Tho University, Can Tho, Vietnam
| | - Minh Tho Nguyen
- Computational Chemistry Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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35
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Abstract
Abstract
We present adsorption processes of dinitrogen on size-selected silver cluster cations, Ag
n
+ (n = 1–10), studied by kinetics measurement using an ion trap. The cluster ions showed sequential adsorption of N2 molecules when the ion trap was cooled down to 105 K, excluding n = 8 and 9 that were exceptionally inactive at this temperature. Termolecular rate coefficients of each adsorption step are determined by analyzing time-dependent changes in the reactant and product ion signals. The first-step rate coefficients were found to increase exponentially from n = 1 to 7 due to increased internal degrees of freedom at larger sizes, which are favorable for accommodating the adsorption energy in a free cluster. In contrast, the adsorption rate turned to decrease for n > 7 due to weaker binding of dinitrogen as revealed by density-functional-theory (DFT) calculation. Adsorption sites on Ag
n
+ are further discussed on the basis of the maximum number of adsorbing N2 molecules observed in the experiment.
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36
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Sato M, Imazeki Y, Fujii K, Nakano Y, Sugiyama M. First-principles modeling of GaN(0001)/water interface: Effect of surface charging. J Chem Phys 2019; 150:154703. [PMID: 31005088 DOI: 10.1063/1.5086321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The accumulation properties of photogenerated carriers at the semiconductor surface determine the performance of photoelectrodes. However, to the best of our knowledge, there are no computational studies that methodically examine the effect of "surface charging" on photocatalytic activities. In this work, the effect of excess carriers at the semiconductor surface on the geometric and electronic structures of the semiconductor/electrolyte interface is studied systematically with the aid of first-principles calculations. We found that the number of water molecules that can be dissociated follows the "extended" electron counting rule; the dissociation limit is smaller than that predicted by the standard electron counting rule (0.375 ML) by the number of excess holes at the interface. When the geometric structure of the GaN/water interface obeys the extended electron counting rule, the Ga-originated surface states are removed from the bandgap due to the excess holes and adsorbates, and correspondingly, the Fermi level becomes free from pinning. Clearly, the excess charge has a great impact on the interface structure and most likely on the chemical reactions. This study serves as a basis for further studies on the semiconductor/electrolyte interface under working conditions.
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Affiliation(s)
- Masahiro Sato
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba Meguro-ku, Tokyo 153-8904, Japan
| | - Yuki Imazeki
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
| | - Katsushi Fujii
- Photonics Control Technology Team, Advanced Photonics Technology Development Group, RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshiaki Nakano
- Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8656, Japan
| | - Masakazu Sugiyama
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba Meguro-ku, Tokyo 153-8904, Japan
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37
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Baletto F. Structural properties of sub-nanometer metallic clusters. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:113001. [PMID: 30562724 DOI: 10.1088/1361-648x/aaf989] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
At the nanoscale, the investigation of structural features becomes fundamental as we can establish relationships between cluster geometries and their physicochemical properties. The peculiarity lies in the variety of shapes often unusual and far from any geometrical and crystallographic intuition clusters can assume. In this respect, we should treat and consider nanoparticles as a new form of matter. Nanoparticle structures depend on their size, chemical composition, ordering, as well as external conditions e.g. synthesis method, pressure, temperature, support. On top of that, at finite temperatures nanoparticles can fluctuate among different structures, opening new and exciting horizons for the design of optimal nanoparticles for advanced applications. This article aims to overview geometrical features of transition metal clusters and of their various rearrangements.
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Affiliation(s)
- Francesca Baletto
- Physics Department, King's College London, WC2R 2LS, London, United Kingdom
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38
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Takagi N, Nakagaki M, Ishimura K, Fukuda R, Ehara M, Sakaki S. Electronic processes in NO dimerization on Ag and Cu clusters: DFT and MRMP2 studies. J Comput Chem 2019; 40:181-190. [PMID: 30378149 DOI: 10.1002/jcc.25568] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/30/2018] [Accepted: 07/31/2018] [Indexed: 11/10/2022]
Abstract
Experimentally observed NO dimerization on Cu and Ag surfaces is surprising because binding energy of NO dimer is very small in gas phase. MRMP2, MP2 to MP4, CCSD(T), and DFT studies of NO dimerization on Ag2 and Cu2 clusters disclosed that the CCSD(T) method could be applied to this reaction on Ag2 and Cu2 unlike NO dimerization in gas phase which exhibits significantly large nondynamical electron correlation effect. Charge-transfer (CT) from Ag2 and Cu2 to NO moieties plays important role in NN bond formation between two NO molecules. This CT considerably decreases nondynamical correlation effect. Also, the DFT method could be applied to this NO dimerization, if appropriate DFT functional is used; all pure functionals examined here and most of the hybrid functionals underestimated the activation barrier (Ea ), while only ωB97X provided Ea similar to CCSD(T)-calculated value. NO dimerization on similar Cu2 and Cu5 needs moderately larger Ea than those on Ag2 and Ag5 , because frontier orbital participating in the CT exists at lower energy in Cu2 and Cu5 than in Ag2 and Ag5 . The Ea decreases in the order Ag2 >> Ag38 > Ag7 ∼ Ag5 and the reaction energy (ΔE) is positive (endothermic) in Ag2 but significantly negative in Ag38 , Ag7 , and Ag5 , indicating that various Ag clusters could be effective for NO dimerization except for Ag2 . The decreasing order of Ea and increasing order of exothermicity are attributed to increasing order of the frontier orbital energy of Ag2 < Ag38 < Ag7 ∼ Ag5 . © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Nozomi Takagi
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan
| | - Masayuki Nakagaki
- Fukui Institute for Fundamental Chemistry (FIFC), Kyoto University, 34-4 Takano-Nishihiraki-cho, Sakyo-ku, Kyoto, 606-8103, Japan
| | - Kazuya Ishimura
- Institute for Molecular Science (IMS), Okazaki, 444-8585, Japan
| | - Ryoichi Fukuda
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan
| | - Masahiro Ehara
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan.,Institute for Molecular Science (IMS), Okazaki, 444-8585, Japan
| | - Shigeyoshi Sakaki
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo-ku, Kyoto, 615-8245, Japan.,Fukui Institute for Fundamental Chemistry (FIFC), Kyoto University, 34-4 Takano-Nishihiraki-cho, Sakyo-ku, Kyoto, 606-8103, Japan
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39
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Theoretical study of O2 interaction with subnanometer-sized Ag clusters supported on defective SiO2 surface. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.10.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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40
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Zierkiewicz W, Michalczyk M, Scheiner S. Regium bonds between M n clusters (M = Cu, Ag, Au and n = 2-6) and nucleophiles NH 3 and HCN. Phys Chem Chem Phys 2018; 20:22498-22509. [PMID: 30140798 DOI: 10.1039/c8cp03883j] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The most stable geometries of the coinage metal (or regium) atom (Cu, Ag, Au) clusters Mn for n up to 6 are all planar, and adopt the lowest possible spin multiplicity. Clusters with even numbers of M atoms are thus singlets, while those with odd n are open-shell doublets. Examination of the molecular electrostatic potential (MEP) of each cluster provides strong indications of the most likely site of attack by an approaching nucleophile, generally one of two positions. A nucleophile (NH3 or HCN) most favorably approaches one particular M atom of each cluster, rather than a bond midpoint or face. In the closed-shell clusters, the interaction energies are highly dependent upon the intensity of the MEP, but this correlation fades for the open-shell systems studied in this work. The strength of the interaction is also closely related to the basicity of the nucleophile. Regium bond energies can be more than 30 kcal mol-1 and tend to follow the Au > Cu > Ag order. These interaction energies are in large part derived from Coulombic attraction, with a smaller orbital interaction contribution.
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Affiliation(s)
- Wiktor Zierkiewicz
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
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41
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Cuny J, Tarrat N, Spiegelman F, Huguenot A, Rapacioli M. Density-functional tight-binding approach for metal clusters, nanoparticles, surfaces and bulk: application to silver and gold. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:303001. [PMID: 29916820 DOI: 10.1088/1361-648x/aacd6c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Density-functional based tight-binding (DFTB) is an efficient quantum mechanical method that can describe a variety of systems, going from organic and inorganic compounds to metallic and hybrid materials. The present topical review addresses the ability and performance of DFTB to investigate energetic, structural, spectroscopic and dynamical properties of gold and silver materials. After a brief overview of the theoretical basis of DFTB, its parametrization and its transferability, we report its past and recent applications to gold and silver systems, including small clusters, nanoparticles, bulk and surfaces, bare and interacting with various organic and inorganic compounds. The range of applications covered by those studies goes from plasmonics and molecular electronics, to energy conversion and surface chemistry. Finally, perspectives of DFTB in the field of gold and silver surfaces and NPs are outlined.
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Affiliation(s)
- Jérôme Cuny
- Laboratoire de Chimie et Physique Quantiques (LCPQ), Université de Toulouse III [UPS] and CNRS, 118 Route de Narbonne, F-31062 Toulouse, France
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42
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Nhat PV, Tai TB. Electronic structure of coinage metal clusters M20 (M = Cu, Ag, Au) from density functional calculations and the phenomenological shell model. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.05.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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43
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Elucidation of the molecular and electronic structures of some magic silver clusters Ag n (n = 8, 18, 20). J Mol Model 2018; 24:209. [PMID: 30022315 DOI: 10.1007/s00894-018-3730-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/19/2018] [Indexed: 01/08/2023]
Abstract
Density functional theory (DFT) calculations were carried out to explore the geometric, spectroscopic, and electronic properties of three magic silver clusters Agn (n = 8, 18, and 20) in detail. The computed results show that the global minima of these clusters are compact, near-spherical structures, while other low-lying isomers exhibit oblate or prolate shapes. Vertical ionization energies for the low-lying isomers were also computed and assigned with respect to available experimental values. Although several isomers were predicted to have similar energies, their electronic and vibrational signatures were quite distinctive, meaning that they could be used as fingerprint signals to distinguish between isomers. In addition, the electronic structures of these systems were explored using the phenomenological shell model. Calculations for the coinage metal clusters M20 (M = Cu, Ag, Au) indicated that the structures and properties of the Ag cluster are similar to those of the Cu cluster in that both Cu20 and Ag20 prefer a compact structure whereas Au20 prefers to adopt a tetrahedral form. Graphical abstract Shell Orbitals of Ag8 Cluster.
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44
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Giarrusso S, Gori-Giorgi P, Della Sala F, Fabiano E. Assessment of interaction-strength interpolation formulas for gold and silver clusters. J Chem Phys 2018; 148:134106. [DOI: 10.1063/1.5022669] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Sara Giarrusso
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling, FEW, Vrije Universiteit, De Boelelaan 1083, 1081HV Amsterdam, The Netherlands
| | - Paola Gori-Giorgi
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling, FEW, Vrije Universiteit, De Boelelaan 1083, 1081HV Amsterdam, The Netherlands
| | - Fabio Della Sala
- Institute for Microelectronics and Microsystems (CNR-IMM), Via Monteroni, Campus Unisalento, 73100 Lecce, Italy
- Center for Biomolecular Nanotechnologies @UNILE, Istituto Italiano di Tecnologia, Via Barsanti, I-73010 Arnesano, Italy
| | - Eduardo Fabiano
- Institute for Microelectronics and Microsystems (CNR-IMM), Via Monteroni, Campus Unisalento, 73100 Lecce, Italy
- Center for Biomolecular Nanotechnologies @UNILE, Istituto Italiano di Tecnologia, Via Barsanti, I-73010 Arnesano, Italy
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45
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Xiong R, Die D, Xu YG, Zheng BX, Fu YC. Probing the structural, electronic and magnetic properties of AgnSc (n = 1–16) clusters. Phys Chem Chem Phys 2018; 20:15824-15834. [DOI: 10.1039/c8cp02605j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The structural, electronic and magnetic properties of AgnSc (n = 1–16) clusters have been studied on the basis of density functional theory and the CALYPSO structure prediction method.
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Affiliation(s)
- Ran Xiong
- School of Science
- Xihua University
- Chengdu 610039
- China
| | - Dong Die
- School of Science
- Xihua University
- Chengdu 610039
- China
| | - Yong-Gen Xu
- School of Science
- Xihua University
- Chengdu 610039
- China
| | - Ben-Xia Zheng
- School of Science
- Xihua University
- Chengdu 610039
- China
| | - Yao-Chun Fu
- School of Science
- Xihua University
- Chengdu 610039
- China
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46
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Xiong R, Die D, Xiao L, Xu YG, Shen XY. Probing the Structural, Electronic, and Magnetic Properties of Ag n V (n = 1-12) Clusters. NANOSCALE RESEARCH LETTERS 2017; 12:625. [PMID: 29247393 PMCID: PMC5732125 DOI: 10.1186/s11671-017-2394-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 11/30/2017] [Indexed: 05/12/2023]
Abstract
The structural, electronic, and magnetic properties of Ag n V (n = 1-12) clusters have been studied using density functional theory and CALYPSO structure searching method. Geometry optimizations manifest that a vanadium atom in low-energy AgnV clusters favors the most highly coordinated location. The substitution of one V atom for an Ag atom in Ag n + 1 (n ≥ 5) cluster modifies the lowest energy structure of the host cluster. The infrared spectra, Raman spectra, and photoelectron spectra of Ag n V (n = 1-12) clusters are simulated and can be used to determine the most stable structure in the future. The relative stability, dissociation channel, and chemical activity of the ground states are analyzed through atomic averaged binding energy, dissociation energy, and energy gap. It is found that V atom can improve the stability of the host cluster, Ag2 excepted. The most possible dissociation channels are Ag n V = Ag + Ag n - 1V for n = 1 and 4-12 and Ag n V = Ag2 + Ag n - 2V for n = 2 and 3. The energy gap of Ag n V cluster with odd n is much smaller than that of Ag n + 1 cluster. Analyses of magnetic property indicate that the total magnetic moment of Ag n V cluster mostly comes from V atom and varies from 1 to 5 μ B. The charge transfer between V and Ag atoms should be responsible for the change of magnetic moment.
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Affiliation(s)
- Ran Xiong
- School of Science, Xihua University, Chengdu, 610039 China
| | - Dong Die
- School of Science, Xihua University, Chengdu, 610039 China
| | - Lu Xiao
- School of Science, Xihua University, Chengdu, 610039 China
| | - Yong-Gen Xu
- School of Science, Xihua University, Chengdu, 610039 China
| | - Xu-Ying Shen
- School of Science, Xihua University, Chengdu, 610039 China
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