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Augustyniak-Jabłokow MA, Daniel C, Hartl H, Spandl J, Yablokov YV. Exchange Interactions and Electron Delocalization in the Mixed-Valence Cluster V4IVV2VO7(OC2H5)12. Inorg Chem 2007; 47:322-32. [DOI: 10.1021/ic7006974] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria A. Augustyniak-Jabłokow
- Institute of Molecular Physics PAS, Smoluchowskiego 17, 60 179 Poznań, Poland, and Institute of Chemistry and Biochemistry/Inorganic Chemistry, Freie Universität Berlin, Fabeckstrasse 34-36, 14195 Berlin, Germany
| | - Charles Daniel
- Institute of Molecular Physics PAS, Smoluchowskiego 17, 60 179 Poznań, Poland, and Institute of Chemistry and Biochemistry/Inorganic Chemistry, Freie Universität Berlin, Fabeckstrasse 34-36, 14195 Berlin, Germany
| | - Hans Hartl
- Institute of Molecular Physics PAS, Smoluchowskiego 17, 60 179 Poznań, Poland, and Institute of Chemistry and Biochemistry/Inorganic Chemistry, Freie Universität Berlin, Fabeckstrasse 34-36, 14195 Berlin, Germany
| | - Johann Spandl
- Institute of Molecular Physics PAS, Smoluchowskiego 17, 60 179 Poznań, Poland, and Institute of Chemistry and Biochemistry/Inorganic Chemistry, Freie Universität Berlin, Fabeckstrasse 34-36, 14195 Berlin, Germany
| | - Yurii V. Yablokov
- Institute of Molecular Physics PAS, Smoluchowskiego 17, 60 179 Poznań, Poland, and Institute of Chemistry and Biochemistry/Inorganic Chemistry, Freie Universität Berlin, Fabeckstrasse 34-36, 14195 Berlin, Germany
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Matsuda Y, Bernstein ER. Identification, Structure, and Spectroscopy of Neutral Vanadium Oxide Clusters. J Phys Chem A 2005; 109:3803-11. [PMID: 16833696 DOI: 10.1021/jp040718r] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Neutral vanadium oxide clusters are studied by photoionization time-of-flight (TOF) mass spectroscopy, electronic spectroscopy, and density functional theory (DFT) calculations. Mass spectra of vanadium oxide clusters are observed by photoionization with lasers of three different wavelengths: 118, 193, and 355 nm. Mechanisms of 118 nm single photon ionization and 193 and 355 nm multiphoton ionization/fragmentation of vanadium oxide clusters are discussed on the basis of observed mass spectral patterns and line widths of the mass spectral features. Only the 118 nm laser light can ionize vanadium oxide neutral species by single photon ionization without fragmentation. The stable vanadium oxide neutral clusters under saturated oxygen growth conditions are found to be of the form (VO2)x(V2O5)y. Structures of the first few members of this series of clusters are determined through high level DFT calculations. Fragmentation of this series of clusters through 355 and 193 nm multiphoton ionization processes is discussed in light of these calculated structures. The B(2)B2 <-- X(2)A1 transition is observed for the VO2 neutral species, and nu1 and nu2 vibrations are assigned for both electronic states. From this spectrum, the VO2 rotational and vibrational temperatures are found to be approximately 50 and approximately 700 K, respectively.
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Affiliation(s)
- Yoshiyuki Matsuda
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA
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Petit S, Borshch SA, Robert V. Exchange interactions in the three phases of vanadyl pyrophosphate (VO)(2)P(2)O(7). J Am Chem Soc 2002; 124:1744-9. [PMID: 11853452 DOI: 10.1021/ja011812d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The magnetic exchange constants of vanadyl pyrophosphate (VO)(2)P(2)O(7) have been calculated on the basis of a combined DFT/broken symmetry approach. The three reported phases, ambient-pressure orthorhombic, ambient-pressure monoclinic, and high-pressure orthorhombic, have been explicitly considered. Calculations have been performed on four types of model clusters extracted from the crystal lattices. The singularity of each phase is clearly reflected through the number and values of exchange parameters. Our results show that the exchange interactions can be described in first approximation within the alternating antiferromagnetic chain model. The largest exchange coupling along the chain occurs through O-P-O bridges. The interchain interactions are much weaker and are of ferromagnetic nature.
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Affiliation(s)
- Sébastien Petit
- Institut de Recherches sur la Catalyse, UPR 5401, 2, Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
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Robert V, Petit S, Borshch SA, Bigot B. Theoretical Analysis of 31P NMR Chemical Shifts in Vanadium Phosphorus Oxides. J Phys Chem A 2000. [DOI: 10.1021/jp994400o] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- V. Robert
- Institut de Recherches sur la Catalyse, UPR 5401, 2, avenue Albert Einstein, 69626 Villeurbanne Cedex, France, Ecole normale supérieure de Lyon, Laboratoire de Chimie Théorique, 46, allée d'Italie, 69364 Lyon Cedex 07, France, and Université Claude Bernard de Lyon I, 43, boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex, France
| | - S. Petit
- Institut de Recherches sur la Catalyse, UPR 5401, 2, avenue Albert Einstein, 69626 Villeurbanne Cedex, France, Ecole normale supérieure de Lyon, Laboratoire de Chimie Théorique, 46, allée d'Italie, 69364 Lyon Cedex 07, France, and Université Claude Bernard de Lyon I, 43, boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex, France
| | - S. A. Borshch
- Institut de Recherches sur la Catalyse, UPR 5401, 2, avenue Albert Einstein, 69626 Villeurbanne Cedex, France, Ecole normale supérieure de Lyon, Laboratoire de Chimie Théorique, 46, allée d'Italie, 69364 Lyon Cedex 07, France, and Université Claude Bernard de Lyon I, 43, boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex, France
| | - B. Bigot
- Institut de Recherches sur la Catalyse, UPR 5401, 2, avenue Albert Einstein, 69626 Villeurbanne Cedex, France, Ecole normale supérieure de Lyon, Laboratoire de Chimie Théorique, 46, allée d'Italie, 69364 Lyon Cedex 07, France, and Université Claude Bernard de Lyon I, 43, boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex, France
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