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Konarev DV, Khasanov SS, Otsuka A, Yamochi H, Saito G, Lyubovskaya RN. Effect of the Cooling Rate on Dimerization of C60•– in Fullerene Salt (DMI+)2·(C60•–)·{Cd(Et2NCS2)2I–}. Inorg Chem 2012; 51:3420-6. [DOI: 10.1021/ic201732t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dmitri V. Konarev
- Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region,
142432 Russia
| | - Salavat S. Khasanov
- Institute of Solid State Physics RAS, Chernogolovka, Moscow region, 142432
Russia
| | - Akihiro Otsuka
- Research Center for
Low Temperature
and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501 Japan
| | - Hideki Yamochi
- Research Center for
Low Temperature
and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501 Japan
| | - Gunzi Saito
- Research Institute, Meijo University,
1-501 Shiogamaguchi, Tempaku-ku,
Nagoya, 468-8502 Japan
| | - Rimma N. Lyubovskaya
- Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region,
142432 Russia
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Nemes NM, García-Hernández M, Bortel G, Kováts É, Nagy BJ, Jalsovszky I, Pekker S. Orientational Ordering and Low-Temperature Libration in the Rotor−Stator Cocrystals of Fullerenes and Cubane. J Phys Chem B 2009; 113:2042-9. [DOI: 10.1021/jp808687z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Norbert M. Nemes
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco Madrid 28040, Spain, Research Institute for Solid State Physics and Optics, HAS, P.O. Box 49, H-1525 Budapest, Hungary, and Department of Organic Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Mar García-Hernández
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco Madrid 28040, Spain, Research Institute for Solid State Physics and Optics, HAS, P.O. Box 49, H-1525 Budapest, Hungary, and Department of Organic Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Gábor Bortel
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco Madrid 28040, Spain, Research Institute for Solid State Physics and Optics, HAS, P.O. Box 49, H-1525 Budapest, Hungary, and Department of Organic Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Éva Kováts
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco Madrid 28040, Spain, Research Institute for Solid State Physics and Optics, HAS, P.O. Box 49, H-1525 Budapest, Hungary, and Department of Organic Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Bence J. Nagy
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco Madrid 28040, Spain, Research Institute for Solid State Physics and Optics, HAS, P.O. Box 49, H-1525 Budapest, Hungary, and Department of Organic Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - István Jalsovszky
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco Madrid 28040, Spain, Research Institute for Solid State Physics and Optics, HAS, P.O. Box 49, H-1525 Budapest, Hungary, and Department of Organic Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Sándor Pekker
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco Madrid 28040, Spain, Research Institute for Solid State Physics and Optics, HAS, P.O. Box 49, H-1525 Budapest, Hungary, and Department of Organic Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
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Macovez R, Goldoni A, Petaccia L, Marenne I, Brühwiler PA, Rudolf P. Reversible phase transformation and doubly charged anions at the surface of simple cubic RbC60. PHYSICAL REVIEW LETTERS 2008; 101:236403. [PMID: 19113572 DOI: 10.1103/physrevlett.101.236403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2008] [Indexed: 05/27/2023]
Abstract
The simple cubic phase of a RbC60 thin film has been studied using photoelectron spectroscopy. The simple cubic-to-dimer transition is found to be reversible at the film surface. A sharp Fermi edge is observed and a lower limit of 0.5 eV is found for the surface Hubbard U, pointing to a strongly correlated metallic character of thin-film simple cubic RbC60. A molecular charge state is identified in the valence band and core-level photoemission spectra which arises from C60(2-) anions and contributes to the spectral intensity at the Fermi level.
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Affiliation(s)
- Roberto Macovez
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
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Konarev DV, Khasanov SS, Saito G, Otsuka A, Lyubovskaya RN. Ionic and Neutral C60 Complexes with Coordination Assemblies of Metal Tetraphenylporphyrins, MIITPP2·DMP (M = Mn, Zn). Coexistence of (C60-)2 Dimers Bonded by One and Two Single Bonds in the Same Compound. Inorg Chem 2007; 46:7601-9. [PMID: 17685507 DOI: 10.1021/ic061628z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Coordination assemblies of metal tetraphenylporphyrins, MIITPP2.DMP (M=Mn, Zn) were shown to form ionic multicomponent and neutral complexes with fullerene, {(MnIITPP)2.DMP}.(C60-)2.(DMETEP+)2.(C6H4Cl2)5 (1) and {(ZnTPP)2.DMP}.(C60)2.(C6H5Cl)4 (2), where DMP=N,N'-dimethylpiperazine and DMETEP+=the cation of N,N'-dimethyl-N'-ethylthioethylpiperazine. The crystal structure of 1 contains zigzag chains of the (C60-)2 dimers alternating with the DMETEP+ cations in the channels formed by the (MnIITPP)2.DMP units, whereas in 2 zigzag chains of the C60 molecules are separated by the (ZnTPP)2.DMP units and C6H5Cl molecules. The (MIITPP)2.DMP assemblies (M=Mn, Zn) have axial M-N(DMP) bonds of 2.315(2) and 2.250(2) A length, average equatorial M-N(DMP) bonds elongated to 2.141(3) and 2.077(2) A, and MII atoms displaced from the porphyrin plane toward the ligand by 0.677 and 0.485 A, respectively. The single-bonded sigma-(C60-)2 dimer coexists in 1 with the (C60-)2 dimer bonded by two single bonds with 86/14 occupancy factors. The sigma-(C60-)2 dimers are unusually stable and begin to dissociate only above a temperature of 320-330 K that results in the increase of the magnetic moment of 1 from 8.33 microB (320 K) to 8.66 microB (360 K). The electron paramagnetic resonance (EPR) signal of the dimeric phase (T<320 K) with the features spread over the range of 0-0.7 T was attributed to the interacting Mn2+ centers in the (MnIITPP)2.DMP units. The dissociation of the sigma-(C60-)2 dimers to the EPR-active C60*- radical anions manifests a new broad Lorenz signal above 320 K with g=2.0179 and DeltaH=65.5 mT. This signal can appear due to the exchange coupling between paramagnetic (MnIITPP)2.DMP and C60*- species. The vis-NIR spectrum of the sigma-(C60-)2 dimers is discussed.
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Affiliation(s)
- Dmitri V Konarev
- Division of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
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Ionic fullerene compounds containing negatively charged dimers and coordinatively bound anions. Russ Chem Bull 2007. [DOI: 10.1007/s11172-007-0063-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Saito G, Yoshida Y. Development of Conductive Organic Molecular Assemblies: Organic Metals, Superconductors, and Exotic Functional Materials. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1] [Citation(s) in RCA: 341] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Konarev DV, Khasanov SS, Kovalevsky AY, Saito G, Otsuka A, Lyubovskaya RN. Structural aspects of two-stage dimerization in an ionic C60complex with bis(benzene)chromium: Cr(C6H6)2·C60·C6H4Cl2. Dalton Trans 2006:3716-20. [PMID: 16865185 DOI: 10.1039/b603685f] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single crystals of the ionic C60 complex with bis(benzene)chromium: {Cr(I)(C6H6)2(.+)}.(C60.-)).C6H4Cl2 (1) were obtained. The crystal structure of 1 shows the presence of monomeric C60.- radical anions at 250 K and the formation of single-bonded (C60-)2 dimers at 90 K. The dimerization is realized in two types of the C60.-) pairs with different interfullerene center-to-center distances of 10.052 and 10.279 A arranged in zigzag chains along the a-direction. As a result, two symmetrically independent (C60-)2 dimers found in 1 at 90 K have different environments, intercage C-C bond lengths and C60- center-to-center distances. Such differences should provide different thermal stability of these dimers and result in the appearance of two stages at the dimerization. Indeed, according to SQUID measurements, the magnetic moment of 1 decreases stepwise at the dimerization in two temperature ranges at 240-200 and 200-160 K.
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Affiliation(s)
- Dmitri V Konarev
- Division of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.
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Nikolaev AV, Michel KH. Superexchange and electron correlations in alkali fullerides AC60, A=K, Rb, Cs. J Chem Phys 2005; 122:064310. [PMID: 15740375 DOI: 10.1063/1.1844491] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Superexchange interactions in alkali fullerides AC(60) are derived for C(60) molecular ions separated by interstitial alkali-metal ions. We use a multiconfiguration approach which comprises the lowest molecular orbital states of the C(60) molecule and the excited s and d states of the alkali-metal atom A. Interactions are described by the valence bond (Heitler-London) method for a complex (C(60)-A-C(60))(-) with two valence electrons. The electronic charge transfer between the alkali-metal atom and a neighboring C(60) molecule is not complete. The occupation probability of excited d and s states of the alkali atom is not negligible. In correspondence with the relative positions of the C(60) molecules and A atoms in the polymer crystal, we consider 180 degrees and 90 degrees (angle) superexchange pathways. For the former case the ground state is found to be a spin singlet separated from a triplet at approximately 20 K. For T<20 K there appear strong spin correlations for the 180 degrees superexchange pathway. The results are related to spin lattice relaxation experiments on CsC(60) in the polymerized and in the quenched cubic phase.
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Affiliation(s)
- A V Nikolaev
- Department of Physics, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Antwerpen, Belgium
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Coulon C, Clérac R. Electron Spin Resonance: A Major Probe for Molecular Conductors. Chem Rev 2004; 104:5655-88. [PMID: 15535664 DOI: 10.1021/cr030639w] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Claude Coulon
- Centre de Recherche Paul Pascal, CNRS UPR 8641, Université Bordeaux 1, 115 Avenue Dr. A. Schweitzer, 33600 Pessac, France.
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Hönnerscheid A, van Wüllen L, Dinnebier R, Jansen M, Rahmer J, Mehring M. Evidence for C60dimerisation in the fulleride [Cr(C9H12)2]+C60−. Phys Chem Chem Phys 2004. [DOI: 10.1039/b317060h] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Alkali-metal fullerides MC60 (THF)x (M=Li, Na, K): a new solution-phase method for the preparation and characterization with ESR, UV–NIR and IR spectroscopy. J Organomet Chem 2000. [DOI: 10.1016/s0022-328x(99)00755-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kim KS, Park JM, Kim J, Suh SB, Tarakeshwar P, Lee KH, Park SS. Dimer to monomer phase transition in alkali-metal fullerides: magnetic susceptibility changes. PHYSICAL REVIEW LETTERS 2000; 84:2425-2428. [PMID: 11018901 DOI: 10.1103/physrevlett.84.2425] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/1999] [Indexed: 05/23/2023]
Abstract
Ab initio calculations have been employed to investigate the peculiar change in magnetic property (from diamagnetic to paramagnetic) of the dianionic C60-dimer phase in a rapidly cooled AC60 samples ( A: alkali metal). We first note that the triplet state of (C60)-22 which was never considered previously is nearly degenerate with the singlet state, and the transition barrier between the two states is reasonably small. This explains the susceptibility increase with an increase in temperature and the magnetic phase transition in the process of the dimer to monomer phase transition.
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Affiliation(s)
- KS Kim
- National Creative Research Initiative Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea
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Guerrero H, Cappelletti R, Neumann D, Yildirim T. Structure and lattice dynamics of K1C60 in the orthorhombic phase: a neutron scattering study. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)01147-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Nikolaev AV, Prassides K, Michel KH. Charge transfer and polymer phases in AC60 (A=K, Rb, Cs) fullerides. J Chem Phys 1998. [DOI: 10.1063/1.475900] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Tanaka K, Saito T, Oshima Y, Yamabe T, Kobayashi H. Change in band structure of orthorhombic Rb1C60 with the chain rotation modeling merohedral disorder. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)88008-6] [Citation(s) in RCA: 12] [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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Oszlányi G, Bortel G, Faigel G, Gránásy L, Bendele GM, Stephens PW, Forró L. Single C-C bond in (C60)22-. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:11849-11852. [PMID: 9985012 DOI: 10.1103/physrevb.54.11849] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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De Seta M, Petaccia L, Evangelisti F. The LUMO-derived band of the [Formula: see text] phases. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 1996; 8:7221-7232. [PMID: 22146560 DOI: 10.1088/0953-8984/8/38/023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The LUMO-derived band of the [Formula: see text] compound was investigated by means of x-ray and UV photoemission and photoelectric yield spectroscopies. A double-peak structure is found, with peak maxima at 1.1 eV and 0.35 eV. The relative magnitude of the two peaks is strongly temperature dependent: a large transfer of spectral weight from the lower- to the higher-binding-energy peak takes place upon cooling to 110 K. The peaks are tentatively attributed to the dimer and the polymeric phase respectively. However the behaviour as a function of temperature does not agree with the metastability of the dimer phase at room temperature. The position of the Fermi level is compatible with a correlated system on the border of the metal - insulating transition.
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Affiliation(s)
- M De Seta
- Dipartimento di Fisica `E Amaldi', Universitá di Roma III via Vasca Navale 84, 00146 Rome, Italy, and Istituto Nazionale di Fisica della Materia, Unitá di Roma III, via Vasca Navale 84, 00146 Rome, Italy
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Brouet V, Alloul H, Yoshinari Y, Forro L. NMR evidence for 1D antiferromagnetic properties in Cs1C60 and Rb1C60 polymers. PHYSICAL REVIEW LETTERS 1996; 76:3638-3641. [PMID: 10061018 DOI: 10.1103/physrevlett.76.3638] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Gránásy L, Pekker S, Forró L. Thermodynamics of polymorphism in the AC60 (A=K, Rb, Cs) alkali fullerides. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:5059-5062. [PMID: 9984089 DOI: 10.1103/physrevb.53.5059] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Poirier DM, Olson CG, Weaver JH. Electronic states and stability of the insulating RbC60 dimer phase. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:11662-11664. [PMID: 9980295 DOI: 10.1103/physrevb.52.r11662] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kamarás K, Gránásy L, Tanner DB, Forró L. Infrared and differential-scanning-calorimetry study of the room-temperature cubic phase of RbC60. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:11488-11491. [PMID: 9980257 DOI: 10.1103/physrevb.52.11488] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tanaka K, Matsuura Y, Oshima Y, Yamabe T, Kobayashi H, Asai Y. Band structure of orthorhombic Rb1C60. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00624-d] [Citation(s) in RCA: 16] [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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