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Naito T, Matsuo S, Inabe T, Toda Y. Carrier dynamics in an organic magnetic superconductor and related salts κ, λ-(BETS)(2)MCl(4) (M = Fe, Ga). J Phys Condens Matter 2010; 22:185701. [PMID: 21393688 DOI: 10.1088/0953-8984/22/18/185701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In order to compare the carrier dynamics and reveal the origin of differences in their electrical behaviour, time-resolved reflectivity changes were measured on single crystals of the title compounds. The observed relaxation behaviour explained well their electrical behaviour, and indicated that different conduction mechanisms dominated κ- and λ-type BETS salts, irrespective of local spins, at about 8-100 K; the electrical behaviour of the κ-type salts is governed by relaxation times of carriers and/or density of states at the Fermi levels, while that of the λ-type salts is dominated by the latter.
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Affiliation(s)
- T Naito
- Graduate School of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo 060-0810, Japan.
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Naito T, Sugawara H, Inabe T. Mechanism of spatially resolved photochemical control of the resistivity of a molecular crystalline solid. Nanotechnology 2007; 18:424008. [PMID: 21730441 DOI: 10.1088/0957-4484/18/42/424008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
By maintaining α-Ag(DM)(2) (DM = C(10)H(8)N(4)) around room temperature (RT) ([Formula: see text]) during ultraviolet-visible (UV-vis) irradiation, a series of photochemical products named β was obtained. The solid β was comprised of structurally different compounds. All of the solid β phases share the original chemical formula of Ag(DM)(2) and exhibit semiconducting behaviour, yet they differ from each other in their XRD patterns. They are divided into two phases: β1 and β2. Compared with the XRD pattern of the α phase, the β1 phase exhibited XRD peaks at the same 2θ-angles but with different relative intensities, while the β2 phase exhibited totally different XRD patterns from those of the α or β1 phases. The actual composition of a particular solid of 'β' phase is dependent upon irradiation time, and can be controlled continuously. Around RT, the α phase exhibits metallic conductivity, while the β1 and β2 phases are suggested to be semiconductors. As a result, one can continuously and finely control the electrical resistivity of Ag(DM)(2) by UV irradiation to modify it into a mixture of α, β1 and/or β2 phases.
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Affiliation(s)
- T Naito
- CRIS, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan. Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
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Naito T, Nishibe K, Inabe T. New Binuclear Copper Complexes [(9S3)Cu(CN)Cu(9S3)]Xn (X=BF4, n=1; X=TCNQ, n=2) (9S3=1, 4, 7-trithiacyclononane): Syntheses, Crystal Structures and Magnetic Properties. Z Anorg Allg Chem 2004. [DOI: 10.1002/zaac.200400313] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kobayashi N, Naito T, Inabe T. Network formation of mellitate anions ([C6(COO)6H6−n]n−) in the salts with piperidinium derivatives and o-phenylenediammonium. CrystEngComm 2004. [DOI: 10.1039/b405097e] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
The [(M+)x[18]crown-6)] supramolecular cations (SC+), in which M+ and [18]crown-6 are alkali metal ions (M+ = Li+, Na+, and Cs+) and 1,4,7,10,13,16-hexaoxacyclooctadecane, respectively, form ionic channel structures through the regular stacks of [18]crown-6 in [Ni(dmit)2]-based molecular conductors (dmit2+ = 2-thioxo-1,3-dithiole-4,5-dithiolate). In addition to the [Ni(dmit)2] salts that have the ionic channel structures (these salts are abbreviated as type I salts), Li+ and Na+ form dimerized [(M+)2([18]crown-6)2] units in the crystals (type II salts). The K+ and Rb+ are coordinated tightly into the [18]crown-6 cavity to form typical disk-shape SC+ units in the corresponding [Ni(dmit)2] salts (type III salts). The type I, II, and III salts have typical stoichiometries of [(M+)x([18]crown-6)][Ni(dmit)2]2, [(M+)([18]crown-6)(H2O)x(CH3CN)(1.5 - x)][Ni(dmit)2]3 (x = 1 for Li+ or 0.5 for Na+), and [M+([18]crown-6)][Ni(dmit)2]3, respectively: the salts of the same type are isostructural. In agreement with the trimer structures of [Ni(dmit)2] in the type II and III salts, they exhibit semiconducting behavior with electrical conductivities at 300 K (sigma(300 K)) of 0.01-0.1 S cm(-1). Type I salts contain a regular stack of partially oxidized [Ni(dmit)2] units, which form a quasi one-dimensional metallic band within the tight-binding approximation regime. The electrical conductivities at 300 K are 10-30 S cm(-1), and an almost temperature-independent conductivity was observed at higher temperatures. However, the one-dimensional electronic structures in these salts are strongly influenced by the static and dynamic structures of the coexisting ionic channel. The Na+ salt is a semiconductor, whose magnetic behavior is described by the disordered one-dimensional antiferromagnetic chain. On the other hand, the Cs+ salt is a exhibits metallic properties with 2 kF instability at room temperature. The Li+ salt shows a gradual transition from the high-temperature metallic phase to the low-temperature one-dimensional antiferromagnetic semiconductor phase, which was associated with the freezing of Li+ motion at lower temperatures. The preferential crystallization of type I salts was possible by controlling the equilibrium constant (Kc) of the complex formation between M+ ions and the [18]crown-6 molecule. The ionic channel structures were obtained when the KC was low in the electrocrystallization solution, while type II or III salts were formed in the high Kc region.
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Affiliation(s)
- T Akutagawa
- Research Institute for Electronic Science, Hokkaido University, Sapporo, Japan.
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Akutagawa T, Hasegawa T, Nakamura T, Takeda S, Inabe T, Sugiura K, Sakata Y, Underhill AE. M+(12-crown-4) supramolecular cations (M+ = Na+, K+, Rb+, and NH4+) within Ni(2-thioxo-1,3-dithiole-4,5-dithiolate)2 molecular conductor. Inorg Chem 2000; 39:2645-51. [PMID: 11197021 DOI: 10.1021/ic000104a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Monovalent cations (M+ = Na+, K+, Rb+, and NH4+) and 12-crown-4 were assembled to new supramolecular cation (SC+) structures of the M+(12-crown-4)n (n = 1 and 2), which were incorporated into the electrically conducting Ni(dmit)2 salts (dmit = 2-thioxo-1,3-dithiole-4,5-dithiolate). The Na+, K+, and Rb+ salts are isostructural with a stoichiometry of the M+(12-crown-4)2[Ni(dmit)2]4, while the NH4+ salt has a stoichiometry of NH4+(12-crown-4)[Ni(dmit)2]3(CH3CN)2. The electrical conductivities of the Na+, K+, Rb+, and NH4+ salts at room temperature are 7.87, 4.46, 0.78, and 0.14 S cm-1, respectively, with a semiconducting temperature dependence. The SC+ structures of the Na+, K+, and Rb+ salts have an ion-capturing sandwich-type cavity of M+(12-crown-4)2, in which the M+ ion is coordinated by eight oxygen atoms of the two 12-crown-4 molecules. On the other hand, the NH4+ ion is coordinated by four oxygen atoms of the 12-crown-4 molecule. Judging from the M(+)-O distances, thermal parameters of oxygen atoms, and vibration spectra, the thermal fluctuation of the Na+(12-crown-4)2 structure is larger than those of K+(12-crown-4)2 and Rb+(12-crown-4)2. The SC+ unit with the larger alkali metal cation gave a stress to the Ni(dmit)2 column, and the SC+ structure changed the pi-pi overlap mode and electrically conducting behavior.
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Affiliation(s)
- T Akutagawa
- Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan.
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Takamatsu N, Akutagawa T, Hasegawa T, Nakamura T, Inabe T, Fujita W, Awaga K. One-dimensional antiferromagnetic chain in [Ni(dmit)2]- salts of [K+ or Rb+(4,13-diaza-18-crown-6)] supramolecular cation. Inorg Chem 2000; 39:870-1. [PMID: 12526363 DOI: 10.1021/ic991198v] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- N Takamatsu
- Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
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Ito E, Oji H, Araki T, Oichi K, Ishii H, Ouchi Y, Kosugi N, Ohta T, Maruyama Y, Naito T, Inabe T, Seki K. Tautomeric structure of N-salicylideneaniline derivatives studied by soft X-ray absorption spectroscopy and X-ray photoelectron spectroscopy. J Synchrotron Radiat 1999; 6:781-783. [PMID: 15263457 DOI: 10.1107/s0909049598017075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/1998] [Accepted: 12/09/1998] [Indexed: 05/24/2023]
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Saji G, Aymar R, Bartels H, Gordon CW, Gulden W, Holland DH, Iida H, Inabe T, Iseli M, Kashirski AV, Kolbasov BN, Krivosheev M, Mccarthy KA, Marbach G, Morozov SI, Natalizio A, Petti DA, Piet SJ, Poucet AE, Raeder J, Seki Y, Topilski LN. Journal of Fusion Energy 1997; 16:237-244. [DOI: 10.1023/a:1021899405431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Imai H, Inabe T, Otsuka T, Okuno T, Awaga K. Molecular spin ladder in the Ni(dmit)2 (dmit=1,3-dithiol-2-thione-4,5-dithiolate) salt with a nitronyl nitroxide cation. Phys Rev B Condens Matter 1996; 54:R6838-R6840. [PMID: 9984393 DOI: 10.1103/physrevb.54.r6838] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kawamata J, Inoue K, Inabe T, Kiguchi M, Kato M, Taniguchi Y. Large second-harmonic generation coefficients of bis(benzylidine) cycloalkanones estimated by the second-harmonic wave generated with the evanescent wave technique. Chem Phys Lett 1996. [DOI: 10.1016/0009-2614(95)01373-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Okazaki T, Seki Y, Inabe T, Aoki I. A proposed safety assurance method and its application to the fusion experimental reactor. Fusion Engineering and Design 1995. [DOI: 10.1016/0920-3796(94)00392-k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Awaga K, Okuno T, Yamaguchi A, Hasegawa M, Inabe T, Maruyama Y, Wada N. Variable magnetic interactions in an organic radical system of (m-N-methylpyridinium alpha -nitronyl nitroxide). Phys Rev B Condens Matter 1994; 49:3975-3981. [PMID: 10011293 DOI: 10.1103/physrevb.49.3975] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Inabe T, Ogata H, Maruyama Y, Achiba Y, Suzuki S, Kikuchi K, Ikemoto I. Electronic structure of alkali metal doped C60 derived from thermoelectric power measurements. Phys Rev Lett 1992; 69:3797-3799. [PMID: 10046916 DOI: 10.1103/physrevlett.69.3797] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Tahara N, Inabe T, Hirono M, Hinohara K, Adachi T. [Regional health care and public health activities by the Suyama Public Health Office]. Hokenfu Zasshi 1979; 35:250-61. [PMID: 255666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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