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Jahn-Teller and Pseudo Jahn-Teller Effects: Influences on the Electronic Structures of Small Transition, Main Group and Mixed Metal Clusters. Struct Chem 2019. [DOI: 10.1007/s11224-019-01448-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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2
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Eckhard JF, Neuwirth D, Panosetti C, Oberhofer H, Reuter K, Tschurl M, Heiz U. Consecutive reactions of small, free tantalum clusters with dioxygen controlled by relaxation dynamics. Phys Chem Chem Phys 2017; 19:5985-5993. [DOI: 10.1039/c6cp07631a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of small cationic tantalum clusters (Tan+, n = 4–8) with molecular oxygen is studied under multi-collision conditions in the gas phase, and the reaction kinetics are analyzed in order to elucidate underlying mechanisms.
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Affiliation(s)
- J. F. Eckhard
- Lehrstuhl für Physikalische Chemie
- Chemistry Department & Catalysis Research Center
- Technische Universität München
- 85748 Garching
- Germany
| | - D. Neuwirth
- Lehrstuhl für Physikalische Chemie
- Chemistry Department & Catalysis Research Center
- Technische Universität München
- 85748 Garching
- Germany
| | - C. Panosetti
- Lehrstuhl für Theoretische Chemie
- Chemistry Department & Catalysis Research Center
- Technische Universität München
- 85748 Garching
- Germany
| | - H. Oberhofer
- Lehrstuhl für Theoretische Chemie
- Chemistry Department & Catalysis Research Center
- Technische Universität München
- 85748 Garching
- Germany
| | - K. Reuter
- Lehrstuhl für Theoretische Chemie
- Chemistry Department & Catalysis Research Center
- Technische Universität München
- 85748 Garching
- Germany
| | - M. Tschurl
- Lehrstuhl für Physikalische Chemie
- Chemistry Department & Catalysis Research Center
- Technische Universität München
- 85748 Garching
- Germany
| | - U. Heiz
- Lehrstuhl für Physikalische Chemie
- Chemistry Department & Catalysis Research Center
- Technische Universität München
- 85748 Garching
- Germany
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3
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Wang HQ, Li HF. Probing the structural and electronic properties of Al-doped small niobium clusters. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.10.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Wang HQ, Li HF, Wang JX, Kuang XY. Structural, electronic and magnetic effects of Al-doped niobium clusters: a density functional theory study. J Mol Model 2011; 18:2993-3001. [PMID: 22146984 DOI: 10.1007/s00894-011-1314-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 11/16/2011] [Indexed: 10/14/2022]
Abstract
The application of the ab initio stochastic search procedure with Saunders "kick" method has been carried out for the elucidation of global minimum structures of a series of Al-doped clusters, Nb(n)Al (1 ≤ n ≤ 10). We have studied the structural characters, growth behaviors, electronic and magnetic properties of Nb(n)Al by the density functional theory calculations. Unlike the previous literature reported on Al-doped systems where ground state structures undergo a structural transition from the Al-capped frame to Al-encapsulated structure, we found that Al atom always occupies the surface of Nb(n)Al clusters and structural transition does not take place until n = 10. Note that the fragmentation proceeds preferably by the ejection of an aluminum atom other than niobium atom. According to the natural population analysis, charges always transfer from aluminum to niobium atoms. Furthermore, the magnetic moments of the Nb(n)Al clusters are mainly located on the 4d orbital of niobium atoms, and aluminum atom possesses very small magnetic moments.
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Affiliation(s)
- Huai-Qian Wang
- College of Engineering, Huaqiao University, Quanzhou 362021, China.
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5
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Nhat PV, Ngan VT, Tai TB, Nguyen MT. Electronic structures, vibrational and thermochemical properties of neutral and charged niobium clusters Nb(n), n = 7-12. J Phys Chem A 2011; 115:3523-35. [PMID: 21446686 DOI: 10.1021/jp110758p] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Geometric and electronic structures, vibrational properties, and relative stabilities of niobium clusters Nb(n), n = 7-12, are studied using both DFT (BPW91 and M06 functionals) and CCSD(T) calculations with the cc-pVnZ-PP basis set. In each cluster, various lower-lying states are very close in energy in such a way that the ground state cannot be unambiguously established by DFT computations. Nb clusters tend to prefer the lowest possible spin state as the ground state, except for Nb(12) ((3)A(g)). The optimal structure of the cluster at a certain size does not simply grow from that of the smaller one by adding an atom randomly. Instead, the Nb clusters prefer a close-packed growth behavior. Nb(10) has a spherically aromatic character, high chemical hardness and large HOMO-LUMO gap. Electron affinities, ionization energies, binding energy per atom, and the stepwise dissociation energies are evaluated. Energetic properties exhibit odd-even oscillations. Comparison with experimental values shows that both BPW91 and M06 functionals are reliable in predicting the EA and IE values, but the BPW91 is deficient in predicting the binding and dissociation energies. We re-examine in particular the experimental far IR spectra previously recorded using the IR-MPD and free electron laser spectrometric techniques and propose novel assignments for Nb(7) and Nb(9) systems. The IR spectra of the anions are also predicted.
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Affiliation(s)
- Pham Vu Nhat
- Department of Chemistry and Mathematical Modeling and Computational Science Center (LMCC), Katholieke Universiteit Leuven, Leuven, Belgium
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6
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Galeev TR, Boldyrev AI. Recent advances in aromaticity and antiaromaticity in transition-metal systems. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1pc90004h] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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7
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Chen WJ, Zhai HJ, Zhang YF, Huang X, Wang LS. On the Electronic and Structural Properties of Tri-Niobium Oxide Clusters Nb3On− (n = 3−8): Photoelectron Spectroscopy and Density Functional Calculations. J Phys Chem A 2010; 114:5958-66. [DOI: 10.1021/jp102439v] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wen-Jie Chen
- Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China, and Department of Chemistry, Brown University, Providence, Rhode Island 02912
| | - Hua-Jin Zhai
- Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China, and Department of Chemistry, Brown University, Providence, Rhode Island 02912
| | - Yong-Fan Zhang
- Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China, and Department of Chemistry, Brown University, Providence, Rhode Island 02912
| | - Xin Huang
- Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China, and Department of Chemistry, Brown University, Providence, Rhode Island 02912
| | - Lai-Sheng Wang
- Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China, and Department of Chemistry, Brown University, Providence, Rhode Island 02912
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8
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Addicoat MA, Metha GF. Excited states of Nb3N2 and Nb3C2: Density functional theory, CASSCF, and MRCI studies. J Chem Phys 2009; 130:164308. [DOI: 10.1063/1.3122542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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9
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Zhai HJ, Wang B, Huang X, Wang LS. Probing the Electronic and Structural Properties of the Niobium Trimer Cluster and Its Mono- and Dioxides: Nb3On− and Nb3On (n = 0−2). J Phys Chem A 2009; 113:3866-75. [DOI: 10.1021/jp809945n] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hua-Jin Zhai
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Post Office Box 999, Richland, Washington 99352, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, and State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China
| | - Bin Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Post Office Box 999, Richland, Washington 99352, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, and State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China
| | - Xin Huang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Post Office Box 999, Richland, Washington 99352, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, and State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China
| | - Lai-Sheng Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, Post Office Box 999, Richland, Washington 99352, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China, and State Key Laboratory of Structural Chemistry, Fuzhou, Fujian 350002, P. R. China
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Dryza V, Gascooke JR, Buntine MA, Metha GF. Onset of carbon–carbon bonding in the Nb5Cy(y = 0–6) clusters: a threshold photo-ionisation and density functional theory study. Phys Chem Chem Phys 2009; 11:1060-8. [DOI: 10.1039/b813359j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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11
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Dryza V, Addicoat MA, Gascooke JR, Buntine MA, Metha GF. Threshold Photoionization and Density Functional Theory Studies of the Niobium Carbide Clusters Nb3Cn (n = 1−4) and Nb4Cn (n = 1−6). J Phys Chem A 2008; 112:5582-92. [DOI: 10.1021/jp800691s] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Viktoras Dryza
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
| | - Matthew A. Addicoat
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
| | - Jason R. Gascooke
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
| | - Mark. A. Buntine
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
| | - Gregory F. Metha
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
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12
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Fielicke A, Ratsch C, von Helden G, Meijer G. The far-infrared spectra of neutral and cationic niobium clusters: Nb50∕+ to Nb90∕+. J Chem Phys 2007; 127:234306. [DOI: 10.1063/1.2806176] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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13
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Harding D, Mackenzie SR, Walsh TR. Structural isomers and reactivity for Rh6 and Rh6+. J Phys Chem B 2007; 110:18272-7. [PMID: 16970446 DOI: 10.1021/jp062603o] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structure, energetics, and interconversion of isomers of Rh(6) and Rh(6)(+) are studied by using density functional theory with Gaussian basis sets, using guess structures derived from basin-hopping simulations, and obtained by using the Sutton-Chen potential. A large range of spin multiplicities is considered for each isomer. Our calculations suggest two low-lying structures as possible structural isomers: a square bipyramid and a trigonal prism. The reactivity of these two candidate structural isomers with respect to adsorption of nitric oxide is studied via location of reaction transition states and calculation of reaction barriers. Similarities and differences with surface reaction studies are highlighted. These data provide powerful evidence that structural isomerism, and not different spin states, is responsible for the observed biexponential reaction kinetics.
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Affiliation(s)
- D Harding
- Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
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Abstract
The structure, energetics, and interconversion of isomers of Nb10 and Nb10+ are studied using density functional theory with Gaussian basis sets, using guess structures derived from basin-hopping simulations with the Finnis-Sinclair [Philos. Mag. A 50, 45 (1984)] potential. These results are used as input to a master equation approach to model the relaxation of these clusters. Ionization potentials are calculated for all relevant minima, as are the infrared spectra. On the basis of these data, and known experimental results, plausible explanations are given for the biexponential reaction kinetics observed for Nb10 and Nb10+ with respect to small molecule adsorbates. In principle, this approach could be extended to investigate any midsized transition metal cluster that exhibits structural isomerism.
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Affiliation(s)
- T R Walsh
- Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom.
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Majumdar D, Balasubramanian K. Theoretical study of the electronic states of Nb4, Nb5 clusters and their anions (Nb4−,Nb5−). J Chem Phys 2004; 121:4014-32. [PMID: 15332947 DOI: 10.1063/1.1769358] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Geometries and energy separations of the various low-lying electronic states of Nb(n) and Nb(n) (-) (n=4,5) clusters with various structural arrangements have been investigated. The complete active space multiconfiguration self-consistent field method followed by multireference singles and doubles configuration interaction (MRSDCI) calculations that included up to 52x10(6) configuration spin functions have been used to compute several electronic states of these clusters. The ground states of both Nb(4) ((1)A('), pyramidal) and Nb(4) (-) ((2)B(3g), rhombus) are low-spin states at the MRSDCI level. The ground state of Nb(5) cluster is a doublet with a distorted trigonal bipyramid (DTB) structure. The anionic cluster of Nb(5) has two competitive ground states with singlet and triplet multiplicities (DTB). The low-lying electronic states of these clusters have been found to be distorted due to Jahn-Teller effect. On the basis of the energy separations of our computed electronic states of Nb(4) and Nb(5), we have assigned the observed photoelectron spectrum of Nb(n) (-) (n=4,5) clusters. We have also compared our MRSDCI results with density functional calculations. The electron affinity, ionization potential, dissociation and atomization energies of Nb(4) and Nb(5) have been calculated and the results have been found to be in excellent agreement with the experiment.
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Affiliation(s)
- D Majumdar
- Center for Image Processing and Integrated Computing, University of California Davis, Livermore, California 94550, USA
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Majumdar D, Balasubramanian K. Theoretical study of the electronic states of niobium trimer (Nb3) and its anion (Nb3−). J Chem Phys 2003. [DOI: 10.1063/1.1626594] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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