Bromide Salt

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Takashi Nogami - One of the best experts on this subject based on the ideXlab platform.

  • electrical conductivities and crystal and band electronic structures of a new phase of bedt ttf Bromide Salt bedt ttf 2br h2o 3
    Synthetic Metals, 1998
    Co-Authors: Takayuki Ishida, Akiko Kobayashi, Takashi Nogami
    Abstract:

    Abstract A new Bromide Salt of BEDT-TTF, (BEDT-TTF) 2 Br(H 2 O) 3 , was obtained by an electrochemical crystallization of the tetrahydrofuran (THF) solution containing BEDT-TTF, malonic acid, and aqueous tetrabutylammonium hydroxide. Commercially available aqueous Bu 4 NOH contaminates Br − , which is the anion source of this Salt. The temperature dependence of the electrical resistance showed a complex behavior, but the resistance decrease in the low temperature range suggests a metallic ground state down to 4.2 K. Its crystal structure belongs to the δ-type, the example of which was found for δ-(BEDT-TTF) 2 AuBr 2 . A tight-binding band structure calculation revealed a closed Fermi surface, characteristic of a two-dimensional band structure.

  • Electrical conductivities and crystal and band-electronic structures of a new phase of BEDT—TTF—Bromide Salt, (BEDT—TTF)2Br(H2O)3
    Synthetic Metals, 1998
    Co-Authors: Takayuki Ishida, Akiko Kobayashi, Takashi Nogami
    Abstract:

    Abstract A new Bromide Salt of BEDT-TTF, (BEDT-TTF) 2 Br(H 2 O) 3 , was obtained by an electrochemical crystallization of the tetrahydrofuran (THF) solution containing BEDT-TTF, malonic acid, and aqueous tetrabutylammonium hydroxide. Commercially available aqueous Bu 4 NOH contaminates Br − , which is the anion source of this Salt. The temperature dependence of the electrical resistance showed a complex behavior, but the resistance decrease in the low temperature range suggests a metallic ground state down to 4.2 K. Its crystal structure belongs to the δ-type, the example of which was found for δ-(BEDT-TTF) 2 AuBr 2 . A tight-binding band structure calculation revealed a closed Fermi surface, characteristic of a two-dimensional band structure.

Takayuki Ishida - One of the best experts on this subject based on the ideXlab platform.

  • electrical conductivities and crystal and band electronic structures of a new phase of bedt ttf Bromide Salt bedt ttf 2br h2o 3
    Synthetic Metals, 1998
    Co-Authors: Takayuki Ishida, Akiko Kobayashi, Takashi Nogami
    Abstract:

    Abstract A new Bromide Salt of BEDT-TTF, (BEDT-TTF) 2 Br(H 2 O) 3 , was obtained by an electrochemical crystallization of the tetrahydrofuran (THF) solution containing BEDT-TTF, malonic acid, and aqueous tetrabutylammonium hydroxide. Commercially available aqueous Bu 4 NOH contaminates Br − , which is the anion source of this Salt. The temperature dependence of the electrical resistance showed a complex behavior, but the resistance decrease in the low temperature range suggests a metallic ground state down to 4.2 K. Its crystal structure belongs to the δ-type, the example of which was found for δ-(BEDT-TTF) 2 AuBr 2 . A tight-binding band structure calculation revealed a closed Fermi surface, characteristic of a two-dimensional band structure.

  • Electrical conductivities and crystal and band-electronic structures of a new phase of BEDT—TTF—Bromide Salt, (BEDT—TTF)2Br(H2O)3
    Synthetic Metals, 1998
    Co-Authors: Takayuki Ishida, Akiko Kobayashi, Takashi Nogami
    Abstract:

    Abstract A new Bromide Salt of BEDT-TTF, (BEDT-TTF) 2 Br(H 2 O) 3 , was obtained by an electrochemical crystallization of the tetrahydrofuran (THF) solution containing BEDT-TTF, malonic acid, and aqueous tetrabutylammonium hydroxide. Commercially available aqueous Bu 4 NOH contaminates Br − , which is the anion source of this Salt. The temperature dependence of the electrical resistance showed a complex behavior, but the resistance decrease in the low temperature range suggests a metallic ground state down to 4.2 K. Its crystal structure belongs to the δ-type, the example of which was found for δ-(BEDT-TTF) 2 AuBr 2 . A tight-binding band structure calculation revealed a closed Fermi surface, characteristic of a two-dimensional band structure.

Akiko Kobayashi - One of the best experts on this subject based on the ideXlab platform.

  • electrical conductivities and crystal and band electronic structures of a new phase of bedt ttf Bromide Salt bedt ttf 2br h2o 3
    Synthetic Metals, 1998
    Co-Authors: Takayuki Ishida, Akiko Kobayashi, Takashi Nogami
    Abstract:

    Abstract A new Bromide Salt of BEDT-TTF, (BEDT-TTF) 2 Br(H 2 O) 3 , was obtained by an electrochemical crystallization of the tetrahydrofuran (THF) solution containing BEDT-TTF, malonic acid, and aqueous tetrabutylammonium hydroxide. Commercially available aqueous Bu 4 NOH contaminates Br − , which is the anion source of this Salt. The temperature dependence of the electrical resistance showed a complex behavior, but the resistance decrease in the low temperature range suggests a metallic ground state down to 4.2 K. Its crystal structure belongs to the δ-type, the example of which was found for δ-(BEDT-TTF) 2 AuBr 2 . A tight-binding band structure calculation revealed a closed Fermi surface, characteristic of a two-dimensional band structure.

  • Electrical conductivities and crystal and band-electronic structures of a new phase of BEDT—TTF—Bromide Salt, (BEDT—TTF)2Br(H2O)3
    Synthetic Metals, 1998
    Co-Authors: Takayuki Ishida, Akiko Kobayashi, Takashi Nogami
    Abstract:

    Abstract A new Bromide Salt of BEDT-TTF, (BEDT-TTF) 2 Br(H 2 O) 3 , was obtained by an electrochemical crystallization of the tetrahydrofuran (THF) solution containing BEDT-TTF, malonic acid, and aqueous tetrabutylammonium hydroxide. Commercially available aqueous Bu 4 NOH contaminates Br − , which is the anion source of this Salt. The temperature dependence of the electrical resistance showed a complex behavior, but the resistance decrease in the low temperature range suggests a metallic ground state down to 4.2 K. Its crystal structure belongs to the δ-type, the example of which was found for δ-(BEDT-TTF) 2 AuBr 2 . A tight-binding band structure calculation revealed a closed Fermi surface, characteristic of a two-dimensional band structure.

Shelley D Minteer - One of the best experts on this subject based on the ideXlab platform.

  • development of alcohol o2 biofuel cells using Salt extracted tetrabutylammonium Bromide nafion membranes to immobilize dehydrogenase enzymes
    Electrochimica Acta, 2005
    Co-Authors: Niki L Akers, Christine M Moore, Shelley D Minteer
    Abstract:

    Abstract Quaternary ammonium Bromide Salt-treated Nafion membranes provide an ideal environment for enzyme immobilization. Because these quaternary ammonium Bromide Salt-treated Nafion membranes retain the physical properties of Nafion and increase the mass transport of ions and neutral species through the membrane, they are also ideal for modifying electrodes. Therefore, high current density bioanodes are formed from poly(methylene green) (an electrocatalyst for NADH) modified electrodes that have been coated with a layer of tetrabutylammonium Bromide Salt-treated Nafion with dehydrogenase enzymes immobilized within the layer. Ethanol/O2 biofuel cells employing these bioanodes have yielded power densities of 1.16 mW/cm2 with a single-enzyme system (alcohol dehydrogenase) and 2.04 mW/cm2 with a double-enzyme system (alcohol dehydrogenase and aldehyde dehydrogenase) in the polymer layer. Methanol/O2 biofuel cells employing these bioanodes have yielded power densities of 1.55 mW/cm2 and open circuit potentials of 0.71 V.

  • Development of alcohol/O2 biofuel cells using Salt-extracted tetrabutylammonium Bromide/Nafion membranes to immobilize dehydrogenase enzymes
    Electrochimica Acta, 2005
    Co-Authors: Niki L Akers, Christine M Moore, Shelley D Minteer
    Abstract:

    Abstract Quaternary ammonium Bromide Salt-treated Nafion membranes provide an ideal environment for enzyme immobilization. Because these quaternary ammonium Bromide Salt-treated Nafion membranes retain the physical properties of Nafion and increase the mass transport of ions and neutral species through the membrane, they are also ideal for modifying electrodes. Therefore, high current density bioanodes are formed from poly(methylene green) (an electrocatalyst for NADH) modified electrodes that have been coated with a layer of tetrabutylammonium Bromide Salt-treated Nafion with dehydrogenase enzymes immobilized within the layer. Ethanol/O2 biofuel cells employing these bioanodes have yielded power densities of 1.16 mW/cm2 with a single-enzyme system (alcohol dehydrogenase) and 2.04 mW/cm2 with a double-enzyme system (alcohol dehydrogenase and aldehyde dehydrogenase) in the polymer layer. Methanol/O2 biofuel cells employing these bioanodes have yielded power densities of 1.55 mW/cm2 and open circuit potentials of 0.71 V.

Roger Frech - One of the best experts on this subject based on the ideXlab platform.

  • effect of temperature on local structure in poly ethylene oxide zinc Bromide Salt complexes
    Macromolecules, 2001
    Co-Authors: Brian P Grady, Christopher P Rhodes, Shawna S York, Roger Frech
    Abstract:

    Extended X-ray absorption fine structure (EXAFS) spectroscopy was used to characterize the (PEO)n[ZnBr2(1-x)(LiBr)x] system. Values of n and x were chosen so that the average number of nearest-neighbor bromine atoms varied from 2.25 to 3 as determined by Raman spectroscopy. This study determined that the number of nearest-neighbor oxygen atoms was 3, 1, and 0 for zinc with 2, 3, and 4 nearest-neighbor bromine atoms, respectively. Some ambiguity is present in the first case, with four nearest-neighbor oxygen atoms being almost impossible and two being possible but not likely. The mean-squared displacement of the zinc−bromine bond increased almost linearly with absolute temperature, similar to the behavior observed for other covalent or ionic bonds. Interestingly, the strength of the Zn−Br bond, as determined by the change of the mean-squared displacement with temperature, was the same for all samples independent of the degree and nature of coordination. For some samples, there was a clear rise in the mean-...