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R A, C S, A P, R K. Spectroscopic and Molecular Docking Studies of a Novel Biologically Active Heterocyclic Compound 2-Chloro-6-Methoxypyridine-4-Carboxylic Acid by Quantum Computational Method. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2102664] [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]
Affiliation(s)
- Arivazhagan R
- Department of Physics, Thiruvalluvar Govt. Arts College, Rasipuram, India
| | - Sridevi C
- Department of Physics, Sri Sarada College for Women (Autonomous), Salem, India
| | - Prakasam A
- Department of Physics, Thiruvalluvar Govt. Arts College, Rasipuram, India
| | - Kumar R
- Department of Physics, Banaras Hindu University, Varanasi, India
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2
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Gutsev GL, Tibbetts KM, Gutsev LG, Aldoshin SM, Ramachandran BR. Mechanisms of complete dissociation of CO2 on iron clusters. Chemphyschem 2022; 23:e202200277. [DOI: 10.1002/cphc.202200277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/27/2022] [Indexed: 11/10/2022]
Affiliation(s)
| | - Katharine Moore Tibbetts
- Virginia Commonwealth University College of Humanities and Sciences Chemistry 1001 W. Main St 23284 Richmond UNITED STATES
| | - Lavrenty G Gutsev
- Louisiana Technical University: Louisiana Tech University Institute for Micromanufacturing 71272 Ruston UNITED STATES
| | - Sergey M Aldoshin
- Institute of Problems of Chemical Physics Quantum Chemistry 1 Acad. Semenov av 142432 Chernogolovka RUSSIAN FEDERATION
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3
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Straßner A, Wiehn C, Klein MP, Fries DV, Dillinger S, Mohrbach J, Prosenc MH, Armentrout PB, Niedner-Schatteburg G. Cryo spectroscopy of N 2 on cationic iron clusters. J Chem Phys 2021; 155:244305. [PMID: 34972374 DOI: 10.1063/5.0064966] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Infrared photodissociation (IR-PD) spectra of iron cluster dinitrogen adsorbate complexes [Fen(N2)m]+ for n = 8-20 reveal slightly redshifted IR active bands in the region of 2200-2340 cm-1. These bands mostly relate to stretching vibrations of end-on coordinated N2 chromophores, a μ1,end end-on binding motif. Density Functional Theory (DFT) modeling and detailed analysis of n = 13 complexes are consistent with an icosahedral Fe13 + core structure. The first adsorbate shell closure at (n,m) = (13,12)-as recognized by the accompanying paper on the kinetics of N2 uptake by cationic iron clusters-comes with extensive IR-PD band broadening resulting from enhanced couplings among adjacent N2 adsorbates. DFT modeling predicts spin quenching by N2 adsorption as evidenced by the shift of the computed spin minima among possible spin states (spin valleys). The IR-PD spectrum of (17,1) surprisingly reveals an absence of any structure but efficient non-resonant fragmentation, which might indicate some weakly bound (roaming) N2 adsorbate. The multiple and broad bands of (17,m) for all other cases than (17,1) and (17,7) indicate a high degree of variation in N2 binding motifs and couplings. In contrast, the (17,7) spectrum of six sharp bands suggests pairwise equivalent N2 adsorbates. The IR-PD spectra of (18,m) reveal additional features in the 2120-2200 cm-1 region, which we associate with a μ1,side side-on motif. Some additional features in the (18,m) spectra at high N2 loads indicate a μ1,tilt tilted end-on adsorption motif.
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Affiliation(s)
- Annika Straßner
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Christopher Wiehn
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Matthias P Klein
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Daniela V Fries
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Sebastian Dillinger
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Jennifer Mohrbach
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Marc H Prosenc
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - P B Armentrout
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
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4
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Straßner A, Klein MP, Fries DV, Wiehn C, Huber ME, Mohrbach J, Dillinger S, Spelsberg D, Armentrout PB, Niedner-Schatteburg G. Kinetics of stepwise nitrogen adsorption by size-selected iron cluster cations: Evidence for size-dependent nitrogen phobia. J Chem Phys 2021; 155:244306. [PMID: 34972360 DOI: 10.1063/5.0064965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a study of stepwise cryogenic N2 adsorption on size-selected Fen + (n = 8-20) clusters within a hexapole collision cell held at T = 21-28 K. The stoichiometries of the observed adsorption limits and the kinetic fits of stepwise N2 uptake reveal cluster size-dependent variations that characterize four structural regions. Exploratory density functional theory studies support tentative structural assignment in terms of icosahedral, hexagonal antiprismatic, and closely packed structural motifs. There are three particularly noteworthy cases, Fe13 + with a peculiar metastable adsorption limit, Fe17 + with unprecedented nitrogen phobia (inefficient N2 adsorption), and Fe18 + with an isomeric mixture that undergoes relaxation upon considerable N2 uptake.
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Affiliation(s)
- Annika Straßner
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Matthias P Klein
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Daniela V Fries
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Christopher Wiehn
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Maximilian E Huber
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Jennifer Mohrbach
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Sebastian Dillinger
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Dirk Spelsberg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
| | - P B Armentrout
- Department of Chemistry, Univerdstsity of Utah, Salt Lake City, Utah 84112, USA
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
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Gutsev GL, Aldoshin SM, Gutsev LG, Ramachandran BR. Evolution of Ferromagnetic and Antiferromagnetic States in Iron Nitride Clusters Fe nN and Fe nN 2 ( n = 1-10). J Phys Chem A 2021; 125:7891-7899. [PMID: 34464135 DOI: 10.1021/acs.jpca.1c05769] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
First-principles density functional theory calculations on neutral and singly negatively and positively charged iron clusters Fen and iron nitride clusters FenN and FenN2 (n = 1-10) in the range of 1 ≤ n ≤ 10 revealed that there is a strong competition between ferromagnetic and antiferromagnetic states especially in the FenN20,±1 cluster series. This phenomenon was related to superexchange via a bridging N atom between two iron atoms in the FenN20,±1 cluster series and to a double superexchange effect via a Fe atom shared by two N atoms in the FenN20,±1 series. A thorough examination of the structure-energy-spin state relationships in these clusters is conducted, leading to new insights and confirmation of available experimental results on structural parameters and dissociation energetics. The bond energies of both nitrogen atoms in the FenN2 series are approximately the same. They weakly depend on the charge of the host cluster and fluctuate around 5.5 eV when moving along the series. The energy of N2 desorption is relatively small; it varies by about 1.0 eV and depends on the charge of the cluster. The experimental finding that N2 dissociates on the Fen+ clusters beginning with n = 4 was supported by the results of our computations. Our computed values of the Fen+-N bonding energies agree with the experimental data within the experimental uncertainty bars. It was found that the attachment of one or two N atoms does not seriously affect the polarizability, electron affinity, or ionization energy of the host iron clusters independent of the charge.
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Affiliation(s)
- Gennady L Gutsev
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States
| | - Sergey M Aldoshin
- Institute of Problems of Chemical Physics of Russian Academy of Sciences, Chernogolovka 142432, Russia
| | - Lavrenty G Gutsev
- Institute of Problems of Chemical Physics of Russian Academy of Sciences, Chernogolovka 142432, Russia.,Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71272, United States
| | - Bala R Ramachandran
- Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71272, United States
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6
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Chen B, Gutsev GL, Sun W, Kuang X, Lu C, Gutsev LG, Aldoshin SM, Ramachandran BR. Dissociation of dinitrogen on iron clusters: a detailed study of the Fe 16 + N 2 case. Phys Chem Chem Phys 2021; 23:2166-2178. [PMID: 33438692 DOI: 10.1039/d0cp05427e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The coalescence of two Fe8N as well as the structure of the Fe16N2 cluster were studied using density functional theory with the generalized gradient approximation and a basis set of triple-zeta quality. It was found that the coalescence may proceed without an energy barrier and that the geometrical structures of the resulting clusters depend strongly on the mutual orientations of the initial moieties. The dissociation of N2 is energetically favorable on Fe16, and the nitrogen atoms share the same Fe atom in the lowest energy state of the Fe16N2 species. The attachment of two nitrogen atoms leads to a decrease in the total spin magnetic moment of the ground-state Fe16 host by 6 μB due to the peculiarities of chemical bonding in the magnetic clusters. In order to gain insight into the dependence of properties on charge and to estimate the bonding energies of both N atoms, we performed optimizations of Fe16N and the singly charged ions of both Fe16N2 and Fe16N. It was found that the electronic properties of the Fe16N2 cluster, such as electron affinity and ionization energy, do not appreciably depend on the attachment of nitrogen atoms but that the average binding energy per atom changes significantly. The lowering in total energy due to the attachment of two N atoms was found to be nearly independent of charge. The IR and Raman spectra were simulated for Fe16N2 and its ions, and it was found that the positions of the most intense peaks in the IR spectra strongly depend on charge and therefore present fingerprints of the charged states. The chemical bonding in the ground-state Fe16N20,±1 species was described in terms of the localized molecular orbitals.
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Affiliation(s)
- Bole Chen
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China.
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7
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Gueddida S, Badawi M, Lebègue S. Grafting of iron on amorphous silica surfaces from ab initio calculations. J Chem Phys 2020; 152:214706. [DOI: 10.1063/5.0007128] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Saber Gueddida
- Univ. Lorraine, LPCT, CNRS UMR7019, F-54506 Vandoeuvre-Les-Nancy, France
| | - Michael Badawi
- Univ. Lorraine, LPCT, CNRS UMR7019, F-54506 Vandoeuvre-Les-Nancy, France
| | - Sébastien Lebègue
- Univ. Lorraine, LPCT, CNRS UMR7019, F-54506 Vandoeuvre-Les-Nancy, France
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8
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Dutta B, Chowdhury J. Existence of dimeric hydroxylamine-O-sulfonic acid: Experimental observations aided by ab initio, DFT, Car-Parrinello and Born – Oppenheimer on the fly dynamics. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Nouemo S, Tchoffo F, Ndjaka J, Domngang S. Global minima of iron clusters described by Gupta potential. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2015.06.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- S. Nouemo
- Department of Physics, Faculty of Sciences, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon
| | - F. Tchoffo
- Department of Physics, Faculty of Sciences, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon
| | - J.M.B. Ndjaka
- Department of Physics, Faculty of Sciences, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon
| | - S. Domngang
- Department of Physics, Faculty of Sciences, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon
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10
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Tazibt S, Chikhaoui A, Bouarab S, Vega A. Structural, Electronic, and Magnetic Properties of Iron Disulfide FenS20/± (n = 1–6) Clusters. J Phys Chem A 2017; 121:3768-3780. [DOI: 10.1021/acs.jpca.7b00942] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Tazibt
- Faculté
du Génie Electrique et d’Informatique, Université Mouloud Mammeri de Tizi-Ouzou, B.P. 17 RP, 15000 Tizi-Ouzou, Algeria
| | - A. Chikhaoui
- Laboratoire
de Physique et Chimie Quantique, Faculté des Sciences, Université Mouloud Mammeri de Tizi-Ouzou, B.P. 17 RP, 15000 Tizi-Ouzou, Algeria
| | - S. Bouarab
- Laboratoire
de Physique et Chimie Quantique, Faculté des Sciences, Université Mouloud Mammeri de Tizi-Ouzou, B.P. 17 RP, 15000 Tizi-Ouzou, Algeria
| | - A. Vega
- Departamento
de Física Teórica, Atómica y Óptica, Universidad de Valladolid, Paseo Belén 7, E-47011 Valladolid, Spain
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11
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Wang D, Yang Z, Xu LC, Liu X, Liu R, Li X. The magnetic and half-metal properties of iron clusters adsorbed on armchair graphene nanoribbon. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.03.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Kim E, Mohrland A, Weck PF, Pang T, Czerwinski KR, Tománek D. Magic numbers in small iron clusters: A first-principles study. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.08.056] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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First principles studies of Fe m Ir n (2 ≤ m + n ≤ 4) nano clusters. APPLIED NANOSCIENCE 2013. [DOI: 10.1007/s13204-013-0232-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Gutsev GL, Weatherford CA, Jena P, Johnson E, Ramachandran BR. Structure and Properties of Fen, Fen–, and Fen+ Clusters, n = 7–20. J Phys Chem A 2012; 116:10218-28. [DOI: 10.1021/jp307284v] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - P. Jena
- Department of Physics, Virginia Commonwealth University, Richmond,
Virginia 23284, United States
| | | | - B. R. Ramachandran
- College of Engineering & Science, Louisiana Tech University, Ruston, Louisiana 71272, United States
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15
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Cervantes-Salguero K, Seminario JM. Structure and energetics of small iron clusters. J Mol Model 2012; 18:4043-52. [DOI: 10.1007/s00894-012-1395-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2011] [Accepted: 02/28/2012] [Indexed: 11/30/2022]
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16
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Valencia I, Tavizón G, Barba-Behrens N, Castro M. Rice-ball structures of iron–benzene clusters, Fe4–(C6H6)m, m⩽3. A density functional study. Chem Phys 2011. [DOI: 10.1016/j.chemphys.2011.10.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Pakiari AH, Mousavi M. Influence of Copper Substitution on the Interaction of Ethylene over Iron Clusters: A Theoretical Study. J Phys Chem A 2011; 115:11796-809. [DOI: 10.1021/jp205254r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ali H. Pakiari
- Chemistry Department, College of Science, Shiraz University, Shiraz 71454, Iran
| | - Masoumeh Mousavi
- Chemistry Department, College of Science, Shiraz University, Shiraz 71454, Iran
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18
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Angeli C, Cimiraglia R. A multireference perturbation theory study on the Fe2molecule: in quest of the ground state. Mol Phys 2011. [DOI: 10.1080/00268976.2011.566586] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Pakiari AH, Mousavi M. A Detailed Study of the Electronic Structure of Fe3 Cluster and Associative Adsorption of N2 to This Cluster: A Natural Bond Orbital Analysis. J Phys Chem A 2010; 114:10209-16. [DOI: 10.1021/jp103540z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. H. Pakiari
- Chemistry Department, College of Science, Shiraz University, Shiraz 71545, Iran
| | - M. Mousavi
- Chemistry Department, College of Science, Shiraz University, Shiraz 71545, Iran
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20
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Ouyang Y, Zhai D, Wang P, Chen H, Du Y, He Y. Structure and stability of Al–Fe–Zr–Ce cluster: density functional study. Theor Chem Acc 2010. [DOI: 10.1007/s00214-010-0768-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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21
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Roy DR, Robles R, Khanna SN. Magnetic moment and local moment alignment in anionic and/or oxidized Fen clusters. J Chem Phys 2010; 132:194305. [DOI: 10.1063/1.3425879] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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22
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Casula M, Marchi M, Azadi S, Sorella S. A consistent description of the iron dimer spectrum with a correlated single-determinant wave function. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.07.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Zhang Z, Cao B, Duan H. Density-functional calculations of MnC(M=Fe, Co, Ni, Cu, n=1–6) clusters. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.theochem.2008.05.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chiodo S, Rivalta I, Michelini MDC, Russo N, Sicilia E, Ugalde JM. Activation of Methane by the Iron Dimer Cation. A Theoretical Study. J Phys Chem A 2006; 110:12501-11. [PMID: 17091956 DOI: 10.1021/jp064611a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A detailed investigation of the reaction mechanisms underlying the observed reactivity of the iron dimer cation with respect to methane has been performed by density functional hybrid (B3LYP) and nonhybrid (BPW91) calculations. Minima and transition states have been fully optimized and characterized along the potential energy surfaces leading to three different exit channels for both the ground and the first excited states of the dimer. A comparison with our previous work covering the reactivity of the Fe(+) monomer was made to underline similarities and differences of the reaction mechanisms. Results show that geometric arrangements corresponding to bridged positions of the ligands with respect to iron atoms are always favored and stabilize intermediates, transition states and products, facilitating their formation. Binding energies of reaction products have been computed and compared with experimental measurements, and ELF analysis of the bond has been performed to rationalize trends as a function of the structure.
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Affiliation(s)
- Sandro Chiodo
- Dipartimento di Chimica and Centro di Calcolo ad Alte Prestazioni per Elaborazioni Parallele e Distribuite-Centro d'Eccellenza MURST, Università della Calabria, I-87030 Arcavacata di Rende, Italy
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O-Atom Transfer to Fe+
n
Clusters (n
= 2-10) from O2
, N2
O and CO2
: “Microoxides of Iron”. Chemistry 2006; 2:598-603. [DOI: 10.1002/chem.19960020520] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/1995] [Revised: 09/12/1995] [Indexed: 11/07/2022]
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Shchavlev AE, Pankratov AN, Borodulin VB, Chaplygina OA. DFT study of the monomers and dimers of 2-pyrrolidone: equilibrium structures, vibrational, orbital, topological, and NBO analysis of hydrogen-bonded interactions. J Phys Chem A 2006; 109:10982-96. [PMID: 16331942 DOI: 10.1021/jp053753m] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A computational study of the monomers and hydrogen-bonded dimers of 2-pyrrolidone was executed at different DFT levels and basis sets. The above dimeric complexes were treated theoretically to elucidate the nature of the intermolecular hydrogen bonds, geometry, thermodynamic parameters, interaction energies, and charge transfer. The processes of dimer formation from monomers and concerted reactions of double proton transfer were considered. The evolution of geometry, vibrational frequencies, charge distribution, and AIM properties in going from monomers to dimers was systematically followed. The solvent effects upon dimer formation were investigated in terms of the self-consistent reaction field (SCRF Onsager model). For the monomers and three dimers, vibrational frequencies were calculated and the changes in frequencies of the vibrations most sensitive to complexation were discussed. The orbital interactions were shown to lengthen the X-H (X = N, O) bond and lower its vibrational frequency (a red shift). To better understand the nature of the corresponding intermolecular interactions, we performed natural bond orbital (NBO) analysis. Topological analysis of electron density at bond critical points (BCP) was executed for complex molecules using the Bader's atoms in molecules (AIM) theory. The interaction energies were calculated, and the basis set superposition errors (BSSE) were estimated systematically. Satisfactory correlations between the structural parameters, interaction energies, and electron density characteristics at BCP were found.
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Affiliation(s)
- Andrew E Shchavlev
- Division of Computational and Informational Science, Volga Region Academy of State Service, 23/25 Sobornaya Street, Saratov 410031, Russia
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Abstract
Density-functional theory has been used to determine the ground-state geometries and electronic states for homonuclear transition-metal trimers constrained to equilateral triangle geometries. This represents the first application of consistent theoretical methods to all of the ten 3d block transition-metal trimers, from scandium to zinc. A search of the potential surfaces yields the following electronic ground states and bond lengths: Sc3(2A1',2.83 A), Ti3(7E',2.32 A), V3(2E",2.06 A), Cr3(17E',2.92 A), Mn3(16A2',2.73 A), Fe3(11E",2.24 A), Co3(6E",2.18 A), Ni3(3A2",2.23 A), Cu3(2E',2.37 A), and Zn3(1A1',2.93 A). Vibrational frequencies, several low-lying electronic states, and trends in bond lengths and atomization energies are discussed. The predicted dissociation energies DeltaE(M3-->M2+M) are 49.4 kcal mol(-1)(Sc3), 64.3 kcal mol(-1)(Ti3), 60.7 kcal mol(-1)(V3), 11.5 kcal mol(-1)(Cr3), 32.4 kcal mol(-1)(Mn3), 61.5 kcal mol(-1)(Fe3), 78.0 kcal mol(-1)(Co3), 86.1 kcal mol(-1)(Ni3), 26.8 kcal mol(-1)(Cu3), and 4.5 kcal mol(-1)(Zn3).
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Affiliation(s)
- Brian N Papas
- Center for Computational Chemistry, University of Georgia, Athens, Georgia 30602, USA
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Guvelioglu GH, Ma P, He X, Forrey RC, Cheng H. Evolution of small copper clusters and dissociative chemisorption of hydrogen. PHYSICAL REVIEW LETTERS 2005; 94:026103. [PMID: 15698199 DOI: 10.1103/physrevlett.94.026103] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Indexed: 05/24/2023]
Abstract
The structural evolution of small copper clusters of up to 15 atoms and the dissociative chemisorption of H2 on the minimum energy clusters are studied systematically using density functional theory. The preferred copper sites for chemisorption are identified and the transition state structures and activation barriers for clusters four to nine atoms are determined and found to be inconsistent with the empirical Bronsted-Evans-Polanyi relationship. The physicochemical properties of the clusters are computed and compared with the bulk and surface values. The results indicate that a phase transition must occur in the going from cluster to bulk.
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Affiliation(s)
- Galip H Guvelioglu
- Air Products and Chemicals, Inc., 7201 Hamilton Boulevard, Allentown, Pennsylvania 18195, USA
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32
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Rollmann G, Sahoo S, Entel P. Structural and magnetic properties of Fe-Ni clusters. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pssa.200405436] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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33
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Shiroishi H, Oda T, Hamada I, Fujima N. Structure and Magnetism of Anion Iron Oxide Clusters. MOLECULAR SIMULATION 2004. [DOI: 10.1080/08927020412331317476] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Berski S, Gutsev GL, Mochena MD, Andrés J. Toward Understanding the Electron Density Distribution in Magnetic Clusters: Insight from the ELF and AIM Analyses of Ground-State Fe4. J Phys Chem A 2004. [DOI: 10.1021/jp0487814] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Slawomir Berski
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland, and Departament de Ciències Experimentals, Universitat Jaume I, Apartat 224, 12080, Castelló, Spain
| | - Gennady L. Gutsev
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307
| | - Mogus D. Mochena
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307
| | - Juan Andrés
- Departament de Ciències Experimentals, Universitat Jaume I, Apartat 224, 12080, Castelló, Spain
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36
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Koszinowski K, Schröder D, Schwarz H. Formation and Reactivity of Gaseous Iron-Sulfur Clusters. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300480] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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37
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Fossan KO, Uggerud E. Reactions of cationic iron clusters with ammonia, models of nitrogen hydrogenation and dehydrogenation. Dalton Trans 2004:892-7. [PMID: 15252474 DOI: 10.1039/b316600g] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The gas phase reactivities of small cationic iron clusters, Fen+ (n = 1-20), towards ammonia were investigated using Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. Sequential addition of ammonia molecules to the clusters was observed to be the dominating process for n > 4. In the case of n = 4 we observed addition of ammonia accompanied by dehydrogenation. This reaction was modelled using hybrid density functional theory. Clusters with n < 4 do not react with ammonia. Clusters Fen+ (n = 1-20) react with neither N2 nor H2 at around 10(-8) mbar. When dinitrogen was seeded into the expanding helium, mixed clusters of the type FenNm+ were observed. These ions react with H2, either by addition, or by substitution of N2. The clusters with m = 1 were isolated in separate experiments and reacted with H2, which showed that mixed clusters with n = 5-13 add up to 5 molecules of dihydrogen in successive slow reactions.
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Affiliation(s)
- Kjell O Fossan
- Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
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38
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Valiev M, Bylaska EJ, Weare JH. Calculations of the electronic structure of 3d transition metal dimers with projector augmented plane wave method. J Chem Phys 2003. [DOI: 10.1063/1.1602694] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Gutsev GL, Bauschlicher CW. Electron Affinities, Ionization Energies, and Fragmentation Energies of Fen Clusters (n = 2−6): A Density Functional Theory Study. J Phys Chem A 2003. [DOI: 10.1021/jp030288p] [Citation(s) in RCA: 159] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Gutsev GL, Bauschlicher CW. Chemical Bonding, Electron Affinity, and Ionization Energies of the Homonuclear 3d Metal Dimers. J Phys Chem A 2003. [DOI: 10.1021/jp030146v] [Citation(s) in RCA: 191] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Castro M, Liu SR, Zhai HJ, Wang LS. Structural and electronic properties of small titanium clusters: A density functional theory and anion photoelectron spectroscopy study. J Chem Phys 2003. [DOI: 10.1063/1.1532000] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Koszinowski K, Schröder D, Schwarz H, Liyanage R, Armentrout PB. Thermochemistry of small cationic iron–sulfur clusters. J Chem Phys 2002. [DOI: 10.1063/1.1518004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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Liyanage R, Zhang XG, Armentrout PB. Activation of methane by size-selected iron cluster cations, Fen+ (n=2–15): Cluster-CHx (x=0–3) bond energies and reaction mechanisms. J Chem Phys 2001. [DOI: 10.1063/1.1413983] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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46
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Calaminici P, Köster AM, Carrington T, Roy P, Russo N, Salahub DR. V3: Structure and vibrations from density functional theory, Franck–Condon factors, and the pulsed-field ionization zero-electron-kinetic energy spectrum. J Chem Phys 2001. [DOI: 10.1063/1.1337859] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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47
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Jackson KA, Knickelbein M, Koretsky G, Srinivas S. The interaction of ammonia with small iron clusters: infrared spectra and density functional calculations of Fen(NH3)m and Fen(ND3)m complexes. Chem Phys 2000. [DOI: 10.1016/s0301-0104(00)00266-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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48
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Barden CJ, Rienstra-Kiracofe JC, Schaefer HF. Homonuclear 3d transition-metal diatomics: A systematic density functional theory study. J Chem Phys 2000. [DOI: 10.1063/1.481916] [Citation(s) in RCA: 235] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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49
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Alonso JA. Electronic and atomic structure, and magnetism of transition-metal clusters. Chem Rev 2000; 100:637-78. [PMID: 11749247 DOI: 10.1021/cr980391o] [Citation(s) in RCA: 273] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J A Alonso
- Departamento de Física Teórica, Universidad de Valladolid, 47011 Valladolid, Spain
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50
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Haslett TL, Bosnick KA, Fedrigo S, Moskovits M. Resonance Raman spectroscopy of matrix-isolated mass-selected Fe3 and Ag3. J Chem Phys 1999. [DOI: 10.1063/1.480014] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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