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Birnoschi L, Chilton NF. Hyperion: A New Computational Tool for Relativistic Ab Initio Hyperfine Coupling. J Chem Theory Comput 2022; 18:4719-4732. [PMID: 35776849 PMCID: PMC9367016 DOI: 10.1021/acs.jctc.2c00257] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Herein we describe Hyperion, a new program for computing
relativistic picture-change-corrected magnetic resonance parameters
from scalar relativistic active space wave functions, with or without
spin–orbit coupling (SOC) included a posteriori. Hyperion also includes a new orbital decomposition method
for assisting active space selection for calculations of hyperfine
coupling. For benchmarking purposes, we determine hyperfine coupling
constants of selected alkali metal, transition metal, and lanthanide
atoms, based on complete active space self-consistent field spin–orbit
calculations in OpenMolcas. Our results are in excellent agreement
with experimental data from atomic spectroscopy as well as theoretical
predictions from four-component relativistic calculations.
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Affiliation(s)
- Letitia Birnoschi
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Nicholas F Chilton
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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Remigio RD, Repisky M, Komorovsky S, Hrobarik P, Frediani L, Ruud K. Four-component relativistic density functional theory with the polarisable continuum model: application to EPR parameters and paramagnetic NMR shifts. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1239846] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Roberto Di Remigio
- Department of Chemistry, Centre for Theoretical and Computational Chemistry, University of Tromsø– The Arctic University of Norway, Tromsø, Norway
| | - Michal Repisky
- Department of Chemistry, Centre for Theoretical and Computational Chemistry, University of Tromsø– The Arctic University of Norway, Tromsø, Norway
| | - Stanislav Komorovsky
- Department of Chemistry, Centre for Theoretical and Computational Chemistry, University of Tromsø– The Arctic University of Norway, Tromsø, Norway
| | - Peter Hrobarik
- Institut für Chemie, Technische Universität Berlin, Berlin, Germany
| | - Luca Frediani
- Department of Chemistry, Centre for Theoretical and Computational Chemistry, University of Tromsø– The Arctic University of Norway, Tromsø, Norway
| | - Kenneth Ruud
- Department of Chemistry, Centre for Theoretical and Computational Chemistry, University of Tromsø– The Arctic University of Norway, Tromsø, Norway
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Maturana RG, Vargas MP, Muñoz-Castro A. Survey Of Long d10–d10 Metallophilic Contacts in Four-Membered Rings of Ag(I) and Au(I) Supported by Carbene–Pyrazole Mixed Ligands. J Phys Chem A 2012; 116:8737-43. [DOI: 10.1021/jp304928k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raul Guajardo Maturana
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - Miguel Ponce Vargas
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - Alvaro Muñoz-Castro
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
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Muñoz-Castro A, Arratia-Perez R. Spin–orbit effects on a gold-based superatom: a relativistic Jellium model. Phys Chem Chem Phys 2012; 14:1408-11. [DOI: 10.1039/c1cp22420d] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Muñoz-Castro A. Nature of the Excited State of Triangulo Silver N-Heterocyclic Carbenes. Insights from Relativistic DFT Calculations. J Phys Chem A 2011; 116:520-5. [DOI: 10.1021/jp2071277] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alvaro Muñoz-Castro
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
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6
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Relativistic calculations of aminotroponiminate complexes containing group 15 (P, As, Sb, Bi) elements. Polyhedron 2011. [DOI: 10.1016/j.poly.2010.12.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Gancheff JS, Denis PA, Ekkehardt Hahn F. Assessment of density functional methods for the study of vanadium and rhenium complexes with thiolato ligands. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.theochem.2009.10.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Muñoz-Castro A, Mac-Leod Carey D, Arratia-Pérez R. Inside a Superatom: The M7q (M=Cu, Ag, q=1+, 0, 1−) Case. Chemphyschem 2010; 11:646-50. [DOI: 10.1002/cphc.200900714] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Alimohammadi Z, Rahemi H, Golzan M, Tayyari SF, Riley MJ. Structural, IR, and EPR studies of the bis(methoxyacetato)diaquo-copper(II) complex. J Mol Model 2008; 15:391-5. [PMID: 19066991 DOI: 10.1007/s00894-008-0413-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2008] [Accepted: 08/24/2008] [Indexed: 11/24/2022]
Abstract
The structure, stability, and the IR, and EPR spectroscopic properties of bis(methoxyacetato)diaquo-copper(II) were studied both experimentally using FT-IR and theoretically using B3LYP/6-31G**, B3LYP/6-311G, BWP91/6-31G** methods. The same approaches were used to calculate the harmonic frequencies and to compare them to the experimental solid state values. The g-tensors are calculated using the NMR/GIAO computational method.
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Affiliation(s)
- Z Alimohammadi
- Chemistry department, Urmia University, Urmia, 57159-165, Iran
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12
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Fritscher J, Hrobárik P, Kaupp M. Computational studies of EPR parameters for paramagnetic molybdenum complexes. II. Larger MoV systems relevant to molybdenum enzymes. Inorg Chem 2007; 46:8146-61. [PMID: 17725345 DOI: 10.1021/ic070341e] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The careful validation of modern density functional methods for the computation of electron paramagnetic resonance (EPR) parameters in molybdenum complexes has been extended to a number of low-symmetry MoV systems that model molybdoenzyme active sites. Both g and hyperfine tensors tend to be reproduced best by hybrid density functionals with about 30-40% exact-exchange admixture, with no particular spin contamination problems encountered. Spin-orbit corrections to hyperfine tensors are mandatory for quantitative and, in some cases, even for qualitative agreement. The g11 (g||) component of the g tensor tends to come out too positive when spin-orbit coupling is included only to leading order in perturbation theory. Compared to single-crystal experiments, the calculations reproduce both g- and hyperfine-tensor orientations well, both relative to each other and to the molecular framework. This is significant, as simulations of the EPR spectra of natural-abundance frozen-solution samples frequently do not allow a reliable determination of the hyperfine tensors. These may now be extracted based on the quantum-chemically calculated parameters. In a number of cases, revised simulations of the experimental spectra have brought theory and experiment into substantially improved agreement. Systems with two terminal oxo ligands, and to some extent with an oxo and a sulfido ligand, have been confirmed to exhibit particularly large negative Deltag33 shifts and thus large g anisotropies. This is discussed in the context of the experimental data for xanthine oxidase.
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Affiliation(s)
- Jörg Fritscher
- Institute of Physical and Theoretical Chemistry and Center for Biological Magnetic Resonance, J. W. Goethe University of Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt, Germany.
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Fritscher J, Hrobarik P, Kaupp M. Computational Studies of Electron Paramagnetic Resonance Parameters for Paramagnetic Molybdenum Complexes. 1. Method Validation on Small and Medium-Sized Systems. J Phys Chem B 2007; 111:4616-29. [PMID: 17408258 DOI: 10.1021/jp070638y] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A variety of density functional methods have been evaluated in the computation of electronic g-tensors and molybdenum hyperfine couplings for systems ranging from the Mo atom through MoIIIN, [MoVOCl4]-, and [MoVOF5]2- to two larger MoV complexes MoXLCl2 (X=O, S; L=tris(3,5-dimethylpyrazolyl)hydroborate anion). In particular, the influence of the molybdenum basis set and of various exchange-correlation functionals with variable admixtures of Hartree-Fock exchange on the computed EPR parameters have been evaluated in detail. Careful basis-set studies have provided a moderate-sized 12s6p5d all-electron basis on molybdenum that gives hyperfine tensors in excellent agreement with much larger basis sets and that will be useful for calculations on larger systems. The best agreement with experimental data for both hyperfine and g-tensors is obtained with hybrid functionals containing approximately 30-40% Hartree-Fock exchange. Only for MoSLCl2 does increasing spin contamination with increasing exact-exchange admixture restrict the achievable computational accuracy. In all cases, spin-orbit corrections to the hyperfine tensors are sizable and have to be included in accurate calculations. Scalar relativistic effects enhance the isotropic Mo hyperfine coupling by approximately 15-20%. Two-component g-tensor calculations with variational inclusion of spin-orbit coupling show that the Deltag parallel components in [MoVOCl4]- and [MoVOF5]2- depend on higher-order spin-orbit contributions and are thus described insufficiently by the usual second-order perturbation approaches. Computed orientations of g- and hyperfine tensors relative to each other and to the molecular framework for the MoXLCl2 complexes provide good agreement between theory and single-crystal electron paramagnetic resonance experiments. In these cases, the hyperfine tensor orientations are influenced only slightly by spin-orbit effects.
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Affiliation(s)
- Jörg Fritscher
- Institute of Physical and Theoretical Chemistry, J. W. Goethe University of Frankfurt, and Center for Biological Magnetic Resonance, Max-von-Laue-Strasse 7, D-60438 Frankfurt, Germany.
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Arratia-Pérez R, Malli GL. Relativistic molecular orbital study of the optical and magnetic properties of hexachloro protactinate (IV): PaCl62−. J Chem Phys 2006; 124:74321. [PMID: 16497050 DOI: 10.1063/1.2173251] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Our ab initio all-electron Dirac-Fock and the corresponding nonrelativistic limit calculations performed at four Pa-Cl bond distances yield for octahedral PaCl(6) (2-) the optimized Pa-Cl bond distances of 2.758 and 2.771 Angstroms, respectively. Dirac scattered wave and its nonrelativistic limit calculations are performed at the optimized Pa-Cl bond distances using a first-order perturbation procedure to obtain the molecular g and hyperfine tensors for the octahedral anion PaCl(6) (2-). The calculated Zeeman and (231)Pa hyperfine interactions are in fairly good agreement with the electron paramagnetic resonance and electron nuclear double resonance values of the Pa(4+) impurity site in the octahedral Cs(2)ZrCl(6) lattice. The calculated relativistic transition energies of the 5f-->5f and 5f-->6d absorption bands are also in good agreement with the experimental results.
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Remenyi C, Munzarova ML, Kaupp M. Comparative Density-Functional Study of the Electron Paramagnetic Resonance Parameters of Amavadin. J Phys Chem B 2005; 109:4227-33. [PMID: 16851485 DOI: 10.1021/jp045148+] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electronic g tensors and hyperfine coupling tensors have been calculated for amavadin, an unusual eight-coordinate vanadium(IV) complex isolated from Amanita muscaria mushrooms. Different density-functional methods have been compared, ranging from local via gradient-corrected to hybrid functionals with a variable Hartree-Fock exchange admixture. For both electron paramagnetic resonance (EPR) properties, hybrid functionals with an appreciable exact-exchange admixture provide the closest agreement with experimental data. Second-order spin-orbit corrections provide non-negligible contributions to the 51V hyperfine tensor. The orientation of g and A tensors relative to each other also depends on spin-orbit corrections to the A tensor. A rationalization for the close resemblance of the EPR parameters of amavadin to those of the structurally rather different vanadyl complexes is provided, based on the nature of the relevant frontier orbitals.
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Affiliation(s)
- Christian Remenyi
- Institut für Anorganische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Arratia-Pérez R, Alvarez-Thon L, Fuentealba P. Calculated geometry and paramagnetic hyperfine structure of the Cu7 cluster. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.08.139] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Filatov M, Cremer D. Relativistically corrected hyperfine structure constants calculated with the regular approximation applied to correlation corrected ab initio theory. J Chem Phys 2004; 121:5618-22. [PMID: 15366984 DOI: 10.1063/1.1785772] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The infinite-order regular approximation (IORA) and IORA with modified metric (IORAmm) is used to develop an algorithm for calculating relativistically corrected isotropic hyperfine structure (HFS) constants. The new method is applied to the calculation of alkali atoms Li-Fr, coinage metal atoms Cu, Ag, and Au, the Hg(+) radical ion, and the mercury containing radicals HgH, HgCH(3), HgCN, and HgF. By stepwise improvement of the level of theory from Hartree-Fock to second-order Møller-Plesset theory and to quadratic configuration interaction theory with single and double excitations, isotropic HFS constants of high accuracy were obtained for atoms and for molecular radicals. The importance of relativistic corrections is demonstrated.
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Affiliation(s)
- Michael Filatov
- Department of Chemistry, Göteborg University, Kemigården 3, S-41296 Göteborg, Sweden.
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Arratia-Pérez R, Hernandez-Acevedo L, Malli GL. Calculated optical and magnetic properties of hexafluorouranate (V) anion: UF[sub 6][sup −]. J Chem Phys 2004; 121:7743-7. [PMID: 15485235 DOI: 10.1063/1.1799891] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Our ab initio all-electron Dirac-Fock and the corresponding nonrelativistic limit calculations performed at four U-F bond distances yield for octahedral UF(6) (-) the optimized U-F bond distance of 2.091 and 2.088 A, respectively. We have also performed Dirac scattered wave calculations at the optimized U-F bond distances using the first-order pertubational procedure to obtain the Zeeman and hyperfine magnetic tensors for the octahedral anion UF(6) (-). The calculated isotropic Zeeman tensor of Deltag=-2.87 is in fairly good agreement with the value of Deltag=-2.78+/-0.10 obtained in electron spin resonance experiments on the H(3)O(+)UF(6) (-) adduct and the unpaired electron-spin spends approximately 2.5% of its time on the fluorine 2p(3/2) spinors. The calculated relativistic transition energies of the near-IR and visible absorption bands are also in good agreement with the experimental results. The octahedral uranium hexafluoride anion has a simple crystal field f(1) configuration; however, relativistic four-component wave functions are necessary to interpret correctly the available magnetic data, while a relativistic treatment taking into account double group symmetrized basis functions should suffice for the interpretation of the optical data.
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Affiliation(s)
- Ramiro Arratia-Pérez
- Departamento de Ciencias Químicas, Universidad Andrés Bello República 275, Santiago, Chile.
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Brownridge S, Grein F. Geometries, Electronic g-tensor Elements, Hyperfine Coupling Constants, and Vertical Excitation Energies for Small Gallium Arsenide Doublet Radicals, GaxAsy (x + y = 3, 5). J Phys Chem A 2003. [DOI: 10.1021/jp035589d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Scott Brownridge
- Department of Chemistry, University of New Brunswick, Fredericton, NB, E3B 6E2, Canada
| | - Friedrich Grein
- Department of Chemistry, University of New Brunswick, Fredericton, NB, E3B 6E2, Canada
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Arratia-Pérez R, Hernández-Acevedo L. Calculated paramagnetic resonance parameters (g,A[sub hfi]) of the Re[sub 6]S[sub 8]Br[sub 6][sup 3−], Re[sub 6]S[sub 8]I[sub 6][sup 3−], and Re[sub 6]Se[sub 8]I[sub 6][sup 3−] cluster ions. J Chem Phys 2003. [DOI: 10.1063/1.1561851] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Neyman KM, Ganyushin DI, Matveev AV, Nasluzov VA. Calculation of Electronic g-Tensors Using a Relativistic Density Functional Douglas−Kroll Method. J Phys Chem A 2002. [DOI: 10.1021/jp0204253] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Konstantin M. Neyman
- Institut für Physikalische und Theoretische Chemie, Technische Universität Munchen, 85747 Garching, Germany
| | - Dmitri I. Ganyushin
- Institut für Physikalische und Theoretische Chemie, Technische Universität Munchen, 85747 Garching, Germany
| | - Alexei V. Matveev
- Institut für Physikalische und Theoretische Chemie, Technische Universität Munchen, 85747 Garching, Germany
| | - Vladimir A. Nasluzov
- Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, 660049 Krasnoyarsk, Russia
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22
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Quiney HM, Belanzoni P. Relativistic calculation of hyperfine and electron spin resonance parameters in diatomic molecules. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(01)01483-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Alvarez-Thon L, Hernández-Acevedo L, Arratia-Pérez R. Calculated paramagnetic resonance parameters of the luminescent Re6S8Cl63− cluster ion. J Chem Phys 2001. [DOI: 10.1063/1.1379970] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Belanzoni P, van Lenthe E, Baerends EJ. An evaluation of the density functional approach in the zero order regular approximation for relativistic effects: Magnetic interactions in small metal compounds. J Chem Phys 2001. [DOI: 10.1063/1.1345509] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Arratia-Pérez R, Hernández-Acevedo L. The Re6Se8Cl64− and Re6Se8I64− cluster ions: Another example of luminescent clusters? J Chem Phys 1999. [DOI: 10.1063/1.479263] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Arratia-Pérez R, Hernández-Acevedo L, Weiss-López B. Calculated paramagnetic properties of the acute GaAs2 and obtuse Ga2As clusters. J Chem Phys 1999. [DOI: 10.1063/1.479028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Arratia-Pérez R, Hernández-Acevedo L. The hexanuclear rhenium cluster ions Re6S8X64− (X=Cl, Br, I): Are these clusters luminescent? J Chem Phys 1999. [DOI: 10.1063/1.477958] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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28
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Arratia-Pérez R, Hernández-Acevedo L. Calculated paramagnetic resonance parameters of a gallium arsenide cluster: Ga2As3. J Chem Phys 1998. [DOI: 10.1063/1.476944] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Arratia-Pérez R, Hernández-Acevedo L, Alvarez-Thon L. Calculated paramagnetic hyperfine structure of pentagonal bipyramid Ag7 cluster. J Chem Phys 1998. [DOI: 10.1063/1.475990] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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30
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van Lenthe E, van der Avoird A, Wormer PES. Density functional calculations of molecular hyperfine interactions in the zero order regular approximation for relativistic effects. J Chem Phys 1998. [DOI: 10.1063/1.475889] [Citation(s) in RCA: 295] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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Arratia-Pérez R, Hernández-Acevedo L. A Dirac molecular orbital study for hexanuclear tungsten cluster structures. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00939-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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A Dirac molecular orbital study for encapsulated heavy transition metals within ytrium cluster iodides. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)01180-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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34
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Arratia-Pérez R, Hernández-Acevedo L, Gómez-Jeria JS. Calculated paramagnetic properties of matrix isolated Au3 cluster. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00000-t] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Arratia-Pérez R, Hernández-Acevedo L. Spin—orbit effects on heavy metal octahedral clusters. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0166-1280(93)85043-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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38
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Zhang Z, Pyper N. Exact relativistic analogues of the non-relativistic hyperfine structure operators. Mol Phys 1988. [DOI: 10.1080/00268978800100643] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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39
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Arratia-Perez R, Marynick DS. Paramagnetic resonance hyperfine structure of hexachloroprotactinate(IV). PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:4893-4899. [PMID: 9943660 DOI: 10.1103/physrevb.37.4893] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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40
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Ab-Initio Relativistic Quantum Chemistry. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/978-94-009-2851-0_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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41
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Arratia-Perez R, Malli GL. Bonding, optical, and magnetic properties of paramagnetic Ag41+ and Ag43+ clusters. ACTA ACUST UNITED AC 1987. [DOI: 10.1016/0022-2364(87)90231-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Arratia‐Perez R, Malli GL. Dirac scattered‐wave study of trigonal bipyramidal silver clusters Ag5q+ (q=0, 2–4). J Chem Phys 1986. [DOI: 10.1063/1.451443] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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