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Okhrimenko D, Budi A, Ceccato M, Johansson D, Lybye D, Bechgaard K, Stipp S. Wettability and hydrolytic stability of 3-aminopropylsilane coupling agent and phenol-urea-formaldehyde binder on silicate surfaces and fibers. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2020.109431] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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2
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Rios-Carvajal T, Bovet N, Bechgaard K, Stipp SLS, Hassenkam T. Effect of Divalent Cations on the Interaction of Carboxylate Self-Assembled Monolayers. Langmuir 2019; 35:16153-16163. [PMID: 31722180 DOI: 10.1021/acs.langmuir.9b02694] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Interactions between organic molecules in aqueous environments, whether in the fluid phase or adsorbed on solids, are often affected by the cations present in the solution. We investigated, at nanometer scale, how surface carboxylate interactions are influenced by dissolved divalent cations: Mg2+, Ca2+, Sr2+, and Ba2+. Self-assembled monolayer (SAM) surfaces with exposed terminations of alkyl, -CH3, carboxylate, -COO- , or dicarboxylate, -DiCOO-, were deposited on gold-coated tips and substrates. We used atomic force microscopy (AFM), in chemical force mapping (CFM) mode, to measure adhesion forces between various combinations of SAMs on the tip and substrate, in solutions of 0.5 M NaCl, that contained 0.012 M of one of the divalent cations. The type of cation, the number of carboxyl groups that interact, and their structure on the SAM influenced adhesion between the surfaces. The effect of the reference solution, which only contains Na+ cations, on adhesion force was mainly attributed to van der Waals and hydrophobic forces, explaining the lower force in systems that are more hydrophilic, i.e., -COO--COO-, and higher force for more hydrophobic systems. For charged surfaces, i.e., -COO- and -DiCOO-, in divalent cation solutions results were consistent with ion bridging. The inclusion of a hydrophobic surface, i.e., the -CH3-COO- or -CH3-DiCOO- system, decreased the possibility for strong cation bridging with the charged surface, resulting in lower adhesion. For systems including -COO-, the adhesion force series followed the inverse cation hydrated radius trend (Na+ ≈ Mg2+ < Sr2+ < Ca2+ < Ba2+) whereas -DiCOO- was responsible for lower adhesion force and modified trends, depending on the corresponding surface in the system. Differences in force magnitude between the monolayers were correlated with lower charge availability on the -DiCOO- surface as a result of fewer active sites, probably because of the tendency of exposed malonate surface groups to interact between them, as well as high rigidity, resulting from the molecule structure. The characteristic response of the -DiCOO- surface in solutions of Sr2+ and Ca2+ was correlated with possible malonate complexation modes. Comparison with previous studies suggested that the strong response of a -DiCOO- surface to Sr2+ resulted from bidentate chelation, whereas Ca2+ response was attributed to alpha-mode association to malonate.
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Affiliation(s)
| | | | | | | | - T Hassenkam
- Nano-Science Center, Department of Chemistry , University of Copenhagen , Copenhagen 1017 , Denmark
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Okhrimenko D, Thomsen A, Ceccato M, Johansson D, Lybye D, Bechgaard K, Tougaard S, Stipp S. Impact of curing time on ageing and degradation of phenol-urea-formaldehyde binder. Polym Degrad Stab 2018. [DOI: 10.1016/j.polymdegradstab.2018.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Auban-Senzier P, Jérome D, Doiron-Leyraud N, René de Cotret S, Sedeki A, Bourbonnais C, Taillefer L, Alemany P, Canadell E, Bechgaard K. The metallic transport of (TMTSF)2X organic conductors close to the superconducting phase. J Phys Condens Matter 2011; 23:345702. [PMID: 21841229 DOI: 10.1088/0953-8984/23/34/345702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
Comparing resistivity data of the quasi-one-dimensional superconductors (TMTSF)2PF6 and (TMTSF)2ClO4 along the least conducting c(⋆)-axis and along the high conductivity a-axis as a function of temperature and pressure, a low temperature regime is observed in which a unique scattering time governs the transport along both directions of these anisotropic conductors. However, the pressure dependence of the anisotropy implies a large pressure dependence of the interlayer coupling. This is in agreement with the results of first-principles density functional theory calculations implying methyl group hyperconjugation in the TMTSF molecule. In this low temperature regime, both materials exhibit for ρ(c) a temperature dependence aT + bT(2). Taking into account the strong pressure dependence of the anisotropy, the T-linear ρ(c) is found to correlate with the suppression of the superconducting Tc, in close analogy with ρ(a) data. This work reveals the domain of existence of the three-dimensional coherent regime in the generic (TMTSF)2X phase diagram and provides further support for the correlation between T-linear resistivity and superconductivity in non-conventional superconductors.
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Affiliation(s)
- P Auban-Senzier
- Laboratoire de Physique des Solides, UMR 8502 CNRS Université Paris-Sud, 91405 Orsay, France
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Sand KK, Yang M, Makovicky E, Cooke DJ, Hassenkam T, Bechgaard K, Stipp SLS. Binding of ethanol on calcite: the role of the OH bond and its relevance to biomineralization. Langmuir 2010; 26:15239-15247. [PMID: 20812690 DOI: 10.1021/la101136j] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The interaction of OH-containing compounds with calcite, CaCO(3), such as is required for the processes that control biomineralization, has been investigated in a low-water solution. We used ethanol (EtOH) as a simple, model, OH-containing organic compound, and observed the strength of its adsorption on calcite relative to OH from water and the consequences of the differences in interaction on crystal growth and dissolution. A combination of atomic force microscopy (AFM) and molecular dynamics (MD) simulations showed that EtOH attachment on calcite is stronger than HOH binding and that the first adsorbed layer of ethanol is highly ordered. The strong ordering of the ethanol molecules has important implications for mineral growth and dissolution because it produces a hydrophobic layer. Ethanol ordering is disturbed along steps and at defect sites, providing a bridge from the bulk solution to the surface. The strong influence of calcite in structuring ethanol extends further into the liquid than expected from electrical double-layer theory. This suggests that in fluids where water activity is low, such as in biological systems optimized for biomineralization, organic molecules can control ion transport to and from the mineral surface, confining it to specific locations, thus providing the organism with control for biomineral morphology.
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Affiliation(s)
- K K Sand
- Nano-Science Center, Department of Chemistry, University of Copenhagen, Denmark.
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Yonezawa S, Kusaba S, Maeno Y, Auban-Senzier P, Pasquier C, Bechgaard K, Jérome D. Anomalous in-plane anisotropy of the onset of superconductivity in (TMTSF)2ClO4. Phys Rev Lett 2008; 100:117002. [PMID: 18517814 DOI: 10.1103/physrevlett.100.117002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Indexed: 05/26/2023]
Abstract
We report the magnetic-field amplitude and field-angle dependence of the superconducting onset temperature Tconset of the organic superconductor (TMTSF)2ClO4 in magnetic fields H accurately aligned to the conductive ab' plane. We revealed that the rapid increase of the onset fields at low temperatures occurs both for H || b' and H || a, irrespective of the carrier confinement. Moreover, in the vicinity of the Pauli-limiting field, we report a shift of a principal axis of the in-plane field-angle dependence of Tconset. This feature may be related to an occurrence of Fulde-Ferrell-Larkin-Ovchinnikov phases.
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Affiliation(s)
- Shingo Yonezawa
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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Shinagawa J, Kurosaki Y, Zhang F, Parker C, Brown SE, Jérome D, Christensen JB, Bechgaard K. Superconducting state of the organic conductor (TMTSF)2ClO4. Phys Rev Lett 2007; 98:147002. [PMID: 17501305 DOI: 10.1103/physrevlett.98.147002] [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] [Received: 11/08/2006] [Indexed: 05/15/2023]
Abstract
(TMTSF)2ClO4 is a quasi-one-dimensional organic conductor and superconductor with Tc=1.4 K, and one of at least two Bechgaard salts observed to have upper critical fields far exceeding the paramagnetic limit. Nevertheless, the 77Se NMR Knight shift at low fields reveals a decrease in spin susceptibility chi(s) consistent with singlet spin pairing. The field dependence of the spin-lattice relaxation rate at 100 mK exhibits a sharp crossover (or phase transition) at a field Hs approximately 15 kOe, to a regime where chi(s) is close to the normal state value, even though Hc2>> Hs.
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Affiliation(s)
- J Shinagawa
- Department of Physics Astronomy, UCLA, Los Angeles, California 90095, USA
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Sommer-larsen P, Bjørnholm T, JøRgensen M, Lerstrup K, Frederiksen P, Schaumburg K, Brunfeldt K, Bechgaard K, Roth S, Poplawski J, Byrne H, Anders J, Eriksson L, Wilbrandt R, Frederiksen J. A Molecular Switch Involving Large Conformational Changes. A Theoretical Study. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259308042901] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- P. Sommer-larsen
- a Centre for Interdisciplinary Studies of Molecular Interactions, University of Copenhagen , Blegdamsvej 21, DK-2100 , Copenhagen ø , Denmark
| | - T. Bjørnholm
- a Centre for Interdisciplinary Studies of Molecular Interactions, University of Copenhagen , Blegdamsvej 21, DK-2100 , Copenhagen ø , Denmark
| | - M. JøRgensen
- a Centre for Interdisciplinary Studies of Molecular Interactions, University of Copenhagen , Blegdamsvej 21, DK-2100 , Copenhagen ø , Denmark
| | - K. Lerstrup
- a Centre for Interdisciplinary Studies of Molecular Interactions, University of Copenhagen , Blegdamsvej 21, DK-2100 , Copenhagen ø , Denmark
| | - P. Frederiksen
- a Centre for Interdisciplinary Studies of Molecular Interactions, University of Copenhagen , Blegdamsvej 21, DK-2100 , Copenhagen ø , Denmark
| | - K. Schaumburg
- a Centre for Interdisciplinary Studies of Molecular Interactions, University of Copenhagen , Blegdamsvej 21, DK-2100 , Copenhagen ø , Denmark
| | - K. Brunfeldt
- a Centre for Interdisciplinary Studies of Molecular Interactions, University of Copenhagen , Blegdamsvej 21, DK-2100 , Copenhagen ø , Denmark
| | - K. Bechgaard
- a Centre for Interdisciplinary Studies of Molecular Interactions, University of Copenhagen , Blegdamsvej 21, DK-2100 , Copenhagen ø , Denmark
| | - S. Roth
- b Max-Planck-Institut für Festkörperforschung , Heisenbergstr. 1, D-7000, Stuttgart , 80 , Germany
| | - J. Poplawski
- b Max-Planck-Institut für Festkörperforschung , Heisenbergstr. 1, D-7000, Stuttgart , 80 , Germany
| | - H. Byrne
- b Max-Planck-Institut für Festkörperforschung , Heisenbergstr. 1, D-7000, Stuttgart , 80 , Germany
| | - J. Anders
- b Max-Planck-Institut für Festkörperforschung , Heisenbergstr. 1, D-7000, Stuttgart , 80 , Germany
| | - L. Eriksson
- c Department of Quantum Chemistry , Uppsala University , Box 518, S-751, 20 , Uppsala , Sweden
| | - R. Wilbrandt
- d Department of Environmental Science and Technology , Risø National Laboratory , DK-4000 , Roskilde , Denmark
| | - J. Frederiksen
- d Department of Environmental Science and Technology , Risø National Laboratory , DK-4000 , Roskilde , Denmark
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Shibaev VP, Deussen HJ, Bobrovsky AY, Shibaev PV, Boiko NI, Bjørnholm T, Schaumburg K, Bechgaard K. Novel atropisomeric binaphthol containing comb-shaped copolymers forming chiral nematic phases. POLYM ENG SCI 2004. [DOI: 10.1002/pen.11738] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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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Schiodt NC, Sommer-Larsen P, Bjornholm T, Nielsen MF, Larsen J, Bechgaard K. Preparation and Electronic Structure of Substituted Aromatic Dithiolene Complexes of Gold(III). Inorg Chem 2002. [DOI: 10.1021/ic00118a016] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bechgaard K, Carneiro K, Rasmussen FB, Olsen M, Rindorf G, Jacobsen CS, Pedersen HJ, Scott JC. Superconductivity in an organic solid. Synthesis, structure, and conductivity of bis(tetramethyltetraselenafulvalenium) perchlorate, (TMTSF)2ClO4. J Am Chem Soc 2002. [DOI: 10.1021/ja00399a065] [Citation(s) in RCA: 291] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Torrance JB, Mayerle JJ, Lee VY, Bechgaard K. A new class of highly conducting organic materials: charge-transfer salts of the tetrathiafulvalenes with the tetrahalo-p-benzoquinones. J Am Chem Soc 2002. [DOI: 10.1021/ja00510a061] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Moradpour A, Peyrussan V, Johansen I, Bechgaard K. High-yield synthesis of tetramethyltetraselenafulvalene (TMTSF) avoiding the use of gaseous hydrogen selenide. J Org Chem 2002. [DOI: 10.1021/jo00151a024] [Citation(s) in RCA: 34] [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: 11/29/2022]
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Beno MA, Blackman GS, Williams JM, Bechgaard K. Synthetic metals based on tetramethyltetraselenafulvalene (TMTSF): synthesis, structure (T = 298 and 125 K), and novel properties of (TMTSF)2H2F3. Inorg Chem 2002. [DOI: 10.1021/ic00140a059] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Friend RH, Jerome D, Fabre JM, Giral L, Bechgaard K. Stabilisation of the metallic state at low temperatures in HMTTF-TCNQ under pressure. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/11/2/012] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Eskildsen J, Krebs FC, Faldt A, Sommer-Larsen P, Bechgaard K. Preparation and structural properties of 7,8-dioxa[6]helicenes and 7a,14c-dihydro-7,8-dioxa[6]helicenes. J Org Chem 2001; 66:200-5. [PMID: 11429901 DOI: 10.1021/jo001312n] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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
The potentially chiral 7,8-dioxa[6]helicenes 1-1c have been prepared by oxidation of their precursors the 7a,14c-dihydro-7,8-dioxa[6]helicenes 3. The crystal structure determination of 3b cis-7a,14c-dihydro-3,12-dibromo-7,8-dioxa[6]helicene unambiguously confirms the cis configuration of the 7a,-14c hydrogens in compounds 3 as previously implied from NMR measurements and also shows that 3b crystallizes in a chiral conformation in the solid state. Selective deuteration of the sterically crowded 1,14 positions of 7,8-dioxa[6]helicene 1 influenced the crystal structure. The deuterium labeled compound D2-1 exhibits a disordered structure, whereas 1 had been found to crystallize in a complex structure which can be described as an analogous partly ordered modulated superstructure. When dehydrogenation of compound 3 to obtain compound 1 was attempted, harsh synthetic conditions gave the unexpected halogenated compounds 5-chloro-7,8-dioxa[6]helicene 1c and cis-7a,14c-dibromo-7,8-dioxa[6]helicene 3c. Compounds 1d and 3b were identified by solving their crystal structure.
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Affiliation(s)
- J Eskildsen
- Department of Condensed Matter Physics and Chemistry, Risø National Laboratory, DK-4000 Roskilde, Denmark
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Abstract
3,8-Diaryldifurano[2,3-a:2',3'-f]naphthalenes were prepared in two simple steps. First, 1,5-dihydroxynaphthalene and 1-aryl-2-bromodecan-1-ones were condensed to the corresponding naphthalene 1,5-diethers. Second, these intermediates were cyclized using methanesulfonic acid in methylene chloride. Seven examples are given, three of which are doubly substituted with octyl chains to enhance the solubility. This increased solubility allowed further modification of the 3,8-aryl groups to attach electron-withdrawing groups (formyl, nitrile, dicyanovinyl, and benzoyl).
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Affiliation(s)
- M Jørgensen
- Condensed Matter Physics and Chemistry Department, Riso National Laboratory, DK-4000 Roskilde, Denmark.
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Kumpf C, Bunk O, Zeysing JH, Su Y, Nielsen M, Johnson RL, Feidenhans'l R, Bechgaard K. Low-temperature structure of indium quantum chains on silicon. Phys Rev Lett 2000; 85:4916-4919. [PMID: 11102150 DOI: 10.1103/physrevlett.85.4916] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2000] [Revised: 08/10/2000] [Indexed: 05/23/2023]
Abstract
The array of quasi-one-dimensional indium chains in the Si(111)- (4x1)-In surface reconstruction exhibits a phase transition to a low-temperature (8x2) phase. It has been suggested that this phase transition is related to a charge density wave (CDW) formation. The x-ray diffraction results presented here demonstrate that at 20 K the CDW has not yet condensed into a superstructure even though good transverse coupling was established. This indicates that CDW formation cannot be the driving force for the phase transition. Furthermore we elucidate the subtle highly anisotropic interchain correlations and reveal the detailed atomic structure of the low-temperature (8x2) phase.
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Affiliation(s)
- C Kumpf
- Condensed Matter Physics and Chemistry Department, Riso National Laboratory, DK-4000 Roskilde, Denmark
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Parkin SSP, Ribault M, Jerome D, Bechgaard K. Three new superconducting members of the family of tetramethyltetraselenafulvalene (TMTSF) salts: TMTSF2CIO4, TMTSF2SbF6, TMTSF2TaF6. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/15/004] [Citation(s) in RCA: 36] [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: 11/12/2022]
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Parkin SSP, Ribault M, Jerome D, Bechgaard K. Superconductivity in the family of organic salts based on the tetramethyltetraselenafulvalene (TMTSF) molecule: (TMTSF)2X (X=ClO4, PF6, AsF6, SbF6, TaF6). ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/34/011] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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25
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Jacobsen CS, Pedersen HJ, Mortensen K, Bechgaard K. Dibenzo-TTF-dichloro-TCNQ: a quasi-one-dimensional magnetic semiconductor. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/13/18/009] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [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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26
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Guy DRP, Boebinger GS, Marseglia EA, Friend RH, Bechgaard K. Temperature dependence of the unit cell of (TMTSF)2ReO4through the metal-insulator transition. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/16/4/015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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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27
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Djurek D, Prester M, Jerome D, Bechgaard K. Magnetic field dependent thermal conductivity in the organic superconductor (TMTSF)2ClO4. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/15/21/005] [Citation(s) in RCA: 15] [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: 11/12/2022]
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Jacobsen CS, Pedersen HJ, Mortensen K, Torrance JB, Bechgaard K. An unusual metal-insulator transition: bis(tetramethyltetraselenafulvalenium)-perrhenate (TMTSF2ReO4). ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/15/12/014] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bouffard S, Ribault M, Brusetti R, Jerome D, Bechgaard K. Low-temperature metallic state and superconductivity in quasi-one-dimensional organic conductors: pressure and irradiation investigations. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/15/13/021] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Moser J, Cooper JR, Jerome D, Alavi B, Brown SE, Bechgaard K. Hall effect in the normal phase of the organic superconductor (TMTSF)2PF6. Phys Rev Lett 2000; 84:2674-2677. [PMID: 11017297 DOI: 10.1103/physrevlett.84.2674] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/1999] [Indexed: 05/23/2023]
Abstract
We report accurate Hall effect measurements performed in the normal phase of the quasi-one-dimensional organic conductor (TMTSF)2PF6 at ambient pressure. The Hall coefficient is found to be strongly temperature dependent all the way from 300 K down to the spin density wave onset arising around 12 K. These new results emphasize the existence of a high temperature regime above 130 K where the Fermi liquid model is not satisfactory.
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Affiliation(s)
- J Moser
- Laboratoire de Physique des Solides, Universite Paris-Sud, 91405 Orsay, France
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Cao N, Timusk T, Bechgaard K. Unconventional Electrodynamic Response of the Quasi-One-Dimensional Organic Conductor (TMTSF)2ClO4. ACTA ACUST UNITED AC 1996. [DOI: 10.1051/jp1:1996184] [Citation(s) in RCA: 23] [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: 11/14/2022]
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35
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Thorup N, Deussen HJ, Bjørnholm T, Bechgaard K, Geisler T. Structural studies of some binaphthyl derivatives. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396088745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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DeuBen HJ, Frederiksen P, Bjornholm T, Bechgaard K. A FACILE LARGE SCALE PREPARATION OF RACEMIC 2.2′-DIHYDROXY-1,1′-BINAPHTHYL. ORG PREP PROCED INT 1996. [DOI: 10.1080/00304949609356559] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Deussen HJ, Hendrickx E, Boutton C, Krog D, Clays K, Bechgaard K, Persoons A, Bjørnholm T. Novel Chiral Bis-dipolar 6,6‘-Disubstituted Binaphthol Derivatives for Second-Order Nonlinear Optics: Synthesis and Linear and Nonlinear Optical Properties. J Am Chem Soc 1996. [DOI: 10.1021/ja960076o] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.7] [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)
- H.-J. Deussen
- Contribution from the Centre for Interdisciplinary Studies of Molecular Interactions, Department of Chemistry, University of Copenhagen, Symbion, Fruebjergvej 3, DK-2100 Copenhagen Ø, Denmark, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, Celestijnenlaan 200D, B-3001 Heverlee, Belgium, and Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - E. Hendrickx
- Contribution from the Centre for Interdisciplinary Studies of Molecular Interactions, Department of Chemistry, University of Copenhagen, Symbion, Fruebjergvej 3, DK-2100 Copenhagen Ø, Denmark, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, Celestijnenlaan 200D, B-3001 Heverlee, Belgium, and Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - C. Boutton
- Contribution from the Centre for Interdisciplinary Studies of Molecular Interactions, Department of Chemistry, University of Copenhagen, Symbion, Fruebjergvej 3, DK-2100 Copenhagen Ø, Denmark, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, Celestijnenlaan 200D, B-3001 Heverlee, Belgium, and Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - D. Krog
- Contribution from the Centre for Interdisciplinary Studies of Molecular Interactions, Department of Chemistry, University of Copenhagen, Symbion, Fruebjergvej 3, DK-2100 Copenhagen Ø, Denmark, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, Celestijnenlaan 200D, B-3001 Heverlee, Belgium, and Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - K. Clays
- Contribution from the Centre for Interdisciplinary Studies of Molecular Interactions, Department of Chemistry, University of Copenhagen, Symbion, Fruebjergvej 3, DK-2100 Copenhagen Ø, Denmark, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, Celestijnenlaan 200D, B-3001 Heverlee, Belgium, and Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - K. Bechgaard
- Contribution from the Centre for Interdisciplinary Studies of Molecular Interactions, Department of Chemistry, University of Copenhagen, Symbion, Fruebjergvej 3, DK-2100 Copenhagen Ø, Denmark, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, Celestijnenlaan 200D, B-3001 Heverlee, Belgium, and Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - A. Persoons
- Contribution from the Centre for Interdisciplinary Studies of Molecular Interactions, Department of Chemistry, University of Copenhagen, Symbion, Fruebjergvej 3, DK-2100 Copenhagen Ø, Denmark, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, Celestijnenlaan 200D, B-3001 Heverlee, Belgium, and Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - T. Bjørnholm
- Contribution from the Centre for Interdisciplinary Studies of Molecular Interactions, Department of Chemistry, University of Copenhagen, Symbion, Fruebjergvej 3, DK-2100 Copenhagen Ø, Denmark, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, Celestijnenlaan 200D, B-3001 Heverlee, Belgium, and Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark
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Schiodt NC, Bjornholm T, Bechgaard K, Neumeier JJ, Allgeier C, Jacobsen CS, Thorup N. Structural, electrical, magnetic, and optical properties of bis-benzene-1,2-dithiolato-Au(IV) crystals. Phys Rev B Condens Matter 1996; 53:1773-1778. [PMID: 9983635 DOI: 10.1103/physrevb.53.1773] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [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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Kulys J, Razumas V, Kazlauskaite J, Marcinkeviciene J, Buch-Rasmussen T, Hansen HE, Bechgaard K, Christensen JB, Frederiksen P. Electrocatalytical oxidation of glucose on graphite using covalently immobilized glucose oxidase and 1,6-dithia- and 1,6-dioxapyrenes as mediators. ELECTROANAL 1994. [DOI: 10.1002/elan.1140060905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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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Kulys J, Buch-Rasmussen T, Bechgaard K, Razumas V, Kazlauskaite J, Marcinkeviciene J, Christensen J, Hansen H. Study of the new electron transfer mediators in glucose oxidase catalysis. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0304-5102(94)00042-5] [Citation(s) in RCA: 46] [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: 10/18/2022]
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Lasjaunias JC, Biljakovic K, Nad' F, Monceau P, Bechgaard K. Glass transition in the spin-density wave phase of (TMTSF)2PF6. Phys Rev Lett 1994; 72:1283-1286. [PMID: 10056669 DOI: 10.1103/physrevlett.72.1283] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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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Kulys J, Buch-Rasmussen T, Bechgaard K, Marcinkeviciene J, Hansen HE. Glucose Oxidase Electrode Based on Graphite and Methylthio Tetrathiafulvalene as Mediator. ANAL LETT 1993. [DOI: 10.1080/00032719308017971] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Barthel E, Kriza G, Quirion G, Wzietek P, Jérome D, Christensen JB, Jorgensen M, Bechgaard K. Conduction noise and motional narrowing of the nuclear magnetic resonance line in sliding spin-density waves. Phys Rev Lett 1993; 71:2825-2828. [PMID: 10054785 DOI: 10.1103/physrevlett.71.2825] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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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Kulys J, Buch-Rasmussen T, Bechgaard K, Marcinkeviciene J, Christensen JB, Hansen HE. Kinetics of glucose oxidase catalyzed electron transfer mediated by sulfur and selenium compounds. FEBS Lett 1993; 329:205-9. [PMID: 8354396 DOI: 10.1016/0014-5793(93)80222-g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Unusually high electron transfer rates in Aspergillus niger glucose oxidase catalyzed oxidation of glucose using 5,6:11,12-Bis(dithio)tetracene (TTT), 1,2-dimethyltetraselenafulvalene (DMTSF) and tetrathiafulvalene (TTF) were observed. At pH 7.0 oxidation rate constants (TN/Km) in the range from 1.0.10(7) to 8.7.10(7) M.s-1 were deduced from experimental data. One of the investigated mediators, DMTSF, has been used for electrocatalytical glucose oxidation on graphite at a potential of 0.3 V vs. a standard calomel electrode (SCE). The prepared bioelectrodes have a sensitivity of 1.3 microA/(cm2.mM), a pH optimum at 6.5-7.0, and a linear range which covers the relevant range for monitoring physiological levels of glucose. The bioelectrodes are stable for more than one month.
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Affiliation(s)
- J Kulys
- Institute of Biochemistry, Vilnius, Lithuania
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Thorup N, Johanssen I, Bechgaard K, Beno MA, Geiser U, Williams JM. Two structural forms of di(dimethyltetraselenafulvalenium) tetrafluoroborate. Acta Crystallogr A 1993. [DOI: 10.1107/s0108767378091473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Biskup N, Basletic M, Tomic S, Korin-Hamzic B, Maki K, Bechgaard K, Fabre JM. Magnetic-field dependence of the phase-coherence length in the spin-density-wave state of tetramethyltetraselenafulvalinium nitrate, (TMTSF)2NO3. Phys Rev B Condens Matter 1993; 47:8289-8292. [PMID: 10004846 DOI: 10.1103/physrevb.47.8289] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wzietek P, Creuzet F, Bourbonnais C, Jérome D, Bechgaard K, Batail P. Nuclear relaxation and electronic correlations in quasi-one-dimensional organic conductors. II. Experiments. ACTA ACUST UNITED AC 1993. [DOI: 10.1051/jp1:1993123] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Thorup N, Frederiksen P, Bechgaard K. Structure of the cation radical salt 3,8-dimethoxy-1,6-dithiapyrenium hexafluorophosphate. Acta Crystallogr C 1992. [DOI: 10.1107/s0108270192002683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Thorup N, Hjorth M, Larsen J, Bechgaard K. Structure of a dibenzo[d,d']benzo[1,2-b:4,3-b']dithiophene (DBBDT) complex with 7,7,8,8-tetracyano-p-quinodimethane (TCNQ). Acta Crystallogr C 1992. [DOI: 10.1107/s0108270191012453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Thorup N, Hjorth M, Christensen JB, Bechgaard K. Structure of a charge-transfer complex of 3,8-diethyl-5,10-dimethyl-1,6-dioxapyrene (DEDMDOP) with 7,7,8,8-tetracyano-p-quinodimethane (TCNQ). Acta Crystallogr C 1992. [DOI: 10.1107/s0108270191010284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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