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Lukens WW, Booth CH, Walter MD. Experimental evaluation of the stabilization of the COT orbitals by 4f orbitals in COT 2Ce using a Hubbard model. Dalton Trans 2021; 50:2530-2535. [PMID: 33522542 DOI: 10.1039/d0dt03897k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Significant orbital mixing is rare in lanthanide complexes because of the limited radial extent of the 4f orbitals, which results in a generally small stabilization due to 4f orbital interactions. Nevertheless, even a small amount of additional stabilization could enhance lanthanide separations. One lanthanide complex in which orbital mixing has been extensively studied both experimentally and computationally is cerocene, COT2Ce, where COT is cyclooctatetraene. This compound has a singlet ground state with a low-lying, triplet excited state. Previous fluorescence studies on trimethylsilyl-substituted cerocenes indicate the triplet state is 0.4 eV higher in energy than the singlet state. In addition, computational studies predict that the triplet is 0.3 to 1 eV higher in energy than the singlet. The synthesis of highly pure COT2Ce by Walter and Andersen allowed its physical properties to be accurately measured. Using these measurements, we evaluate the stabilization of the 4f orbitals using two, independent approaches. A Hubbard model is used to evaluate the stabilization of the ground state due to orbital mixing. This stabilization, which is also the singlet-triplet gap, is -0.29 eV using this model. This gap was also from the temperature independent paramagnetism of COT2Ce, which yielded a value of -0.32 eV.
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Affiliation(s)
- Wayne W Lukens
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
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Edelstein NM, Lukens WW. f-Orbital Mixing in the Octahedral f 2 Compounds UX 62- [X = F, Br, Cl, I] and PrCl 63. J Phys Chem A 2020; 124:4253-4262. [PMID: 32354208 DOI: 10.1021/acs.jpca.0c02022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Understanding how interactions between the f orbitals and ligand orbitals in lanthanide and actinide systems affect their physical properties is the central issue in f-element chemistry. A wide variety of approaches including both theoretical and experimental tools have been used to study these relationships. Among the most widely used tools has been crystal field theory (CFT), which bridges theory and experiment in that it is a model based largely on atomic theory that is parametrized using experimental data. Crystal field theory is quite accurate for the lanthanides, due in part to the highly contracted nature of the 4f orbitals. For actinides, crystal field theory is less accurate, potentially due to the treatment of orbital mixing. In CFT, orbital mixing is handled implicitly by allowing the electron repulsion parameters (Slater Fk parameters) and the spin-orbit coupling constant to vary. As a result, orbital mixing in CFT is isotropic in that the Fk parameters and the spin-orbit coupling constant affect all f orbitals equally. This approximation works well for the lanthanides due to the limited degree of orbital mixing in these complexes. In actinide complexes, the 5f orbitals have greater overlap with the ligand orbitals, and this approximation is less accurate than in the lanthanides. Here, we report a modification of CFT that includes the effect of orbital mixing on electron repulsion and spin-orbit coupling for each f orbital. The model is applied to the tetravalent uranium hexahalide dianions and PrCl63- for which the energies of many low-lying excited states are known. The new model generally fits the data as well the traditional CFT although with fewer parameters. However, the new model does not fit the data better than the more complex CFT models of Faucher and co-workers. The results of the model show in detail how changes in overlap and orbital energies influence the energies of the bonding and antibonding orbitals.
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Affiliation(s)
- Norman M Edelstein
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, United States
| | - Wayne W Lukens
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, California 94720, United States
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Kimmich R, Fatkullin N. Self-diffusion studies by intra- and inter-molecular spin-lattice relaxometry using field-cycling: Liquids, plastic crystals, porous media, and polymer segments. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2017; 101:18-50. [PMID: 28844220 DOI: 10.1016/j.pnmrs.2017.04.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/02/2017] [Accepted: 04/02/2017] [Indexed: 06/07/2023]
Abstract
Field-cycling NMR relaxometry is a well-established technique for probing molecular dynamics in a frequency range from typically a few kHz up to several tens of MHz. For the interpretation of relaxometry data, it is quite often assumed that the spin-lattice relaxation process is of an intra-molecular nature so that rotational fluctuations dominate. However, dipolar interactions as the main type of couplings between protons and other dipolar species without quadrupole moments can imply appreciable inter-molecular contributions. These fluctuate due to translational displacements and to a lesser degree also by rotational reorientations in the short-range limit. The analysis of the inter-molecular proton spin-lattice relaxation rate thus permits one to evaluate self-diffusion variables such as the diffusion coefficient or the mean square displacement on a time scale from nanoseconds to several hundreds of microseconds. Numerous applications to solvents, plastic crystals and polymers will be reviewed. The technique is of particular interest for polymer dynamics since inter-molecular spin-lattice relaxation diffusometry bridges the time scales of quasi-elastic neutron scattering and field-gradient NMR diffusometry. This is just the range where model-specific intra-coil mechanisms are assumed to occur. They are expected to reveal themselves by characteristic power laws for the time-dependence of the mean-square segment displacement. These can be favorably tested on this basis. Results reported in the literature will be compared with theoretical predictions. On the other hand, there is a second way for translational diffusion phenomena to affect the spin-lattice relaxation dispersion. If rotational diffusion of molecules is restricted, translational diffusion properties can be deduced even from molecular reorientation dynamics detected by intra-molecular spin-lattice relaxation. This sort of scenario will be relevant for adsorbates on surfaces or polymer segments under entanglement and chain connectivity constraints. Under such conditions, reorientations will be correlated with translational displacements leading to the so-called RMTD relaxation process (reorientation mediated by translational displacements). Applications to porous glasses, protein solutions, lipid bilayers, and clays will be discussed. Finally, we will address the intriguing fact that the various time limits of the segment mean-square displacement of polymers in some cases perfectly reproduce predictions of the tube/reptation model whereas the reorientation dynamics suggests strongly deviating power laws.
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Affiliation(s)
| | - Nail Fatkullin
- Institute of Physics, Kazan Federal University, Kazan 420008 Tatarstan, Russia
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Kelley MP, Su J, Urban M, Luckey M, Batista ER, Yang P, Shafer JC. On the Origin of Covalent Bonding in Heavy Actinides. J Am Chem Soc 2017; 139:9901-9908. [PMID: 28657317 DOI: 10.1021/jacs.7b03251] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Recent reports have suggested the late actinides participate in more covalent interactions than the earlier actinides, yet the origin of this shift in chemistry is not understood. This report considers the chemistry of actinide dipicolinate complexes to identify why covalent interactions become more prominent for heavy actinides. A modest increase in measured actinide:dipicolinate stability constants is coincident with a significant increase in An 5f energy degeneracy with the dipicolinate molecular orbitals for Bk and Cf relative to Am and Cm. While the interactions in the actinide-dipicolinate complex are largely ionic, the decrease in 5f orbital energy across the series manifests in orbital-mixing and, hence, covalency driven by energy degeneracy. This observation suggests the origin of covalency in heavy actinide interactions stems from the degeneracy of 5f orbitals with ligand molecular orbitals rather than spatial orbital overlap. These findings suggest that the limiting radial extension of the 5f orbitals later in the actinide series could make the heavy actinides ideal elements to probe and tune effects of energy degeneracy driven covalency.
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Affiliation(s)
- Morgan P Kelley
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Jing Su
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Matthew Urban
- Department of Chemistry, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Morgan Luckey
- Department of Chemistry, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Enrique R Batista
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Jenifer C Shafer
- Department of Chemistry, Colorado School of Mines , Golden, Colorado 80401, United States
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Binet L, Sharma SK, Gourier D. Interaction of Cr(3+) with valence and conduction bands in the long persistent phosphor ZnGa2O4:Cr(3+), studied by ENDOR spectroscopy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:385501. [PMID: 27460505 DOI: 10.1088/0953-8984/28/38/385501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Cr(3+)-doped zinc gallate ZnGa2O4 is a red-near infrared (IR) long persistent phosphor that can be excited by orange-red light, in the transparency window of living tissues. With this property, persistent luminescence nanoparticles were recently used for in vivo optical imaging of tumors in mice. In order to understand the origin of the excitability of persistent luminescence by visible light in this material, a Q-band ENDOR investigation of (71/69)Ga and (53)Cr nuclei was performed in ZnGa2O4:Cr(3+) to get information on the interaction of Cr(3+) with valence and conduction bands. The positive electron spin density at Ga nuclei revealed a dominant interaction of the (4)A2 ground state of Cr(3+) with the valence band, and a weaker interaction with the conduction band. The latter may occur only in the excited (2)E and (4)T2 states of Cr(3+). It is proposed that when these two interactions are present, pairs of electrons and holes can be generated from excited Cr(3+) in distorted sites undergoing local electric field produced by neighboring defects with opposite charges.
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Affiliation(s)
- Laurent Binet
- PSL Research University, Chimie ParisTech-CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
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Denning RG, Harmer J, Green JC, Irwin M. Covalency in the 4f Shell of tris-Cyclopentadienyl Ytterbium (YbCp3)—A Spectroscopic Evaluation. J Am Chem Soc 2011; 133:20644-60. [DOI: 10.1021/ja209311g] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Robert G. Denning
- Department of Chemistry and ‡Center for Advanced Electron Spin Resonance, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Jeffrey Harmer
- Department of Chemistry and ‡Center for Advanced Electron Spin Resonance, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Jennifer C. Green
- Department of Chemistry and ‡Center for Advanced Electron Spin Resonance, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Mark Irwin
- Department of Chemistry and ‡Center for Advanced Electron Spin Resonance, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
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Rimmer DE, Johnston DF. A study of the origin of the trigonal crystal field in ruby: II. Theory. ACTA ACUST UNITED AC 2002. [DOI: 10.1088/0370-1328/89/4/318] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Davies JJ. Transferred hyperfine interactions through unpaired spin on intervening ions: V2+ and Mn2+ in KMgF3. ACTA ACUST UNITED AC 2002. [DOI: 10.1088/0022-3719/1/4/304] [Citation(s) in RCA: 21] [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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Freund P, Owen J, Hann BF. 17O transferred hyperfine interactions in magnesium oxide. ACTA ACUST UNITED AC 2002. [DOI: 10.1088/0022-3719/6/6/006] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tofield BC, Jacobson AJ, Fender BEF. Some magnetic properties of BaPrO3and BaTbO3: the magnetic form factor for Tb4+by neutron diffraction. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/5/20/008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Taylor DR, Owen J, Wanklyn BM. Hyperfine interactions and electron transfer between metal ions in Fe:LaAlO3and Cr:LaAlO3. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/6/16/013] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Jaros M. Ground states and photoionization of iron group transition metal impurities in semiconductors. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/4/17/028] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Davies JJ, Smith SRP, Owen J, Hann BF. ENDOR measurements of spin transfer in (VF6)4-. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/5/2/013] [Citation(s) in RCA: 22] [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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Hutchings MT, Guggenheim HJ. Neutron diffraction measurement of covalency and spin deviation: a test of theory and experimental method using Ni2+in KNiF3. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/3/6/011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Patel JL, Davies JJ, Cavenett BC, Takeuchi H, Horai K. Electron spin resonance of axially symmetric Cr3+centres in KMgF3and KZnF3. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/9/1/020] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Friedt JM, Sanchez JP. Origin of the magnetic hyperfine field transferred at iodine in ferromagnetic CrI3. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/11/17/024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Davies JJ, Nicholls JE, Verity D. Electron paramagnetic resonance of Ti2+in zinc-fired ZnSe. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/13/7/014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Newman DJ, Ng B, Poon YM. Parametrisation and interpretation of paramagnetic ion spectra. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/17/31/013] [Citation(s) in RCA: 24] [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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Ab
initio
molecular orbital calculations of the ground and excited states of the permanganate and chromate ions. ACTA ACUST UNITED AC 1997. [DOI: 10.1098/rspa.1970.0203] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The bonding in the permanganate and chromate ions is described by means of self-consistent field molecular orbital calculations employing a basis of Slater type orbitals expanded in Gaussian type functions. A new procedure for the solution of the self-consistent field equations is described and applied to the ions studied here. Excited state wavefunctions are calculated using configuration interaction considering all singly excited configurations involving all virtual and valence orbitals. The calculated transition energies and transition moments are compared with those from the experimental electronic spectra.
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Dreyhsig J, Litzenburger B. Nature of optical transitions in the charge-transfer region of ZnS:Co and ZnSe:Co. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:10516-10524. [PMID: 9984847 DOI: 10.1103/physrevb.54.10516] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Pecquenard B, Gourier D, Caurant D. Electron Nuclear Double Resonance of Polarons in α-LixV2O5. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960237a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brigitte Pecquenard
- Laboratoire de Chimie Appliquée de l'Etat Solide, URA 1466 CNRS, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Didier Gourier
- Laboratoire de Chimie Appliquée de l'Etat Solide, URA 1466 CNRS, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Daniel Caurant
- Laboratoire de Chimie Appliquée de l'Etat Solide, URA 1466 CNRS, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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Casanovas J, Illas F. Ground and excited states of KNiF3: An ab initio cluster-model approach. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:3789-3798. [PMID: 9976657 DOI: 10.1103/physrevb.50.3789] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dreyhsig J, Gumlich H, Allen JW. Spin-dependent multiplet average energies for 3dN impurities in tetrahedral semiconductors and a comparison with spin-polarized mean-field calculations. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:15002-15015. [PMID: 10008031 DOI: 10.1103/physrevb.48.15002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Electronic structure and optical spectra of transition metal complexes by the effective Hamiltonian method. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf01113064] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Richardson JW, Janssen GJ. Theoretical analysis of orbital and correlation effects on the electronic absorption spectrum of the MnS4 center in zinc-blende crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:4958-4977. [PMID: 9948885 DOI: 10.1103/physrevb.39.4958] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Shrivastava KN. Theory of the transferred hyperfine interaction between well-separated atoms and the influence of soft-phonon modes. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 34:1489-1495. [PMID: 9939795 DOI: 10.1103/physrevb.34.1489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Sabelli NH, Kahn LR, Benedek R. Spin‐dependent effective core potentials for Ni++. J Chem Phys 1980. [DOI: 10.1063/1.440121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Seno Y, Kameda N, Otsuka J. The electronic structure of ferrous heme with imidazole as the fifth ligand. I. SCF–LCAO–ASMO and CI calculation on the low‐lying multiplets and optically allowed excited states. J Chem Phys 1980. [DOI: 10.1063/1.439061] [Citation(s) in RCA: 13] [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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Theory of nuclear quadrupole interactions in ionic iron-group compounds?Role of antishielding effects. ACTA ACUST UNITED AC 1978. [DOI: 10.1007/bf01021880] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Pueyo L, Richardson JW. Improved calculation of electronic excitation energies of transition‐metal compounds by a correlation energy correction: Application to CrF63− and NiF64−. J Chem Phys 1977. [DOI: 10.1063/1.435334] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ab initio Calculation of the charge distribution and the ligand field splitting in the tetrahedral halo complexes CuCl 4 2? 4 and NiCl 4 2? ACTA ACUST UNITED AC 1977. [DOI: 10.1007/bf00551553] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Brandow B. Linked-Cluster Perturbation Theory for Closed- and Open-Shell Systems. ADVANCES IN QUANTUM CHEMISTRY 1977. [DOI: 10.1016/s0065-3276(08)60581-x] [Citation(s) in RCA: 134] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Larsson S. Transferred hyperfine structure interactions in transition metal complexes. ACTA ACUST UNITED AC 1975. [DOI: 10.1007/bf00550319] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kobinata S. The Electronic Structures of Cu(II) Complexes as Determined by Means of the Configurational Interaction Method. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1974. [DOI: 10.1246/bcsj.47.1085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Berthier G. Some Recent Developments in the Theory of Coordination Compounds of Metals. ADVANCES IN QUANTUM CHEMISTRY 1974. [DOI: 10.1016/s0065-3276(08)60062-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Kobinata S. The Electronic Structure of Nickelocene by Means of the Configurational Interaction Method. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1973. [DOI: 10.1246/bcsj.46.2976] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Buznik VM, Afanas'ev ML, Falaleeva LG. Investigation of the magnetic screening of fluorine nuclei in crystals of the perovskite structural type. J STRUCT CHEM+ 1973. [DOI: 10.1007/bf00746905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Andriessen J. Approximate SCF calculations on the [Mn(H2O)6]2+complex with a minimal basis set. Mol Phys 1972. [DOI: 10.1080/00268977200101071] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Slater JC. Statistical Exchange-Correlation in the Self-Consistent Field. ADVANCES IN QUANTUM CHEMISTRY 1972. [DOI: 10.1016/s0065-3276(08)60541-9] [Citation(s) in RCA: 922] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Moskowitz JW, Hollister C, Hornback CJ, Basch H. Self‐Consistent‐Field Study of the Cluster Model in Ionic Salts. I. NiF64−. J Chem Phys 1970. [DOI: 10.1063/1.1674371] [Citation(s) in RCA: 51] [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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50
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Trivedi PC. On the Nature of the Crystal‐Field Approximation. IV. Generalization and Numerical Results. J Chem Phys 1970. [DOI: 10.1063/1.1674020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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