Proton conduction of DNA–imidazole composite material under anhydrous condition

Yamada, Masashi; Goto, Akito

doi:10.1038/pj.2012.5

Cited by 17 publications

(17 citation statements)

References 41 publications

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“…This fact explains the difference in activation energies. On the other hand, our results coincide with those obtained for the materials measured at lower humidity levels and/or containing heterocyclic molecules (Kreuer et al 1993;Tang et al 2014;Pandey et al 1999;Yamada et al 2012;Yamada et al 2004;Yamada and Ogino 2015). Generally, the higher activation energy (i.e.…”

Section: Electrical Conductivitysupporting

confidence: 80%

Imidazole-doped nanocrystalline cellulose solid proton conductor: synthesis, thermal properties, and conductivity

et al. 2017

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A new proton conducting material with a possible application as a membrane in fuel cells is synthesized. It is formed by nanocrystalline cellulose (NCC) doped with a different concentration of the imidazole molecules (Im) used as ''dry'' conducting species. The nanocomposites (NCC-Im) are obtained in the form of films. Their chemical composition, thermal properties, and the electric conductivity are determined by elementary and thermogravimetric analysis, differential scanning calorimetry and impedance spectroscopy methods, respectively. The nanocomposite (1.7NCC-Im) with the highest concentration of imidazole i.e. one Im per 1.7 glucose unit shows the highest electrical conductivity equal to 2.7 9 10 -2 S/m at 140°C. This value is about five orders of magnitude higher than that of the pure NCC film at this same temperature. The important feature is that it is obtained for nanocomposite under anhydrous conditions.

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Section: Electrical Conductivitysupporting

confidence: 80%

Imidazole-doped nanocrystalline cellulose solid proton conductor: synthesis, thermal properties, and conductivity

et al. 2017

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“…17,30 The pectin/Ti/Im composite material sandwiched between two gold electrodes (diameter: 5 mm). The direction of conductive measurement is perpendicular to the composite material.…”

Section: Tensile Strength Of Pectin/ti Composite Filmmentioning

confidence: 99%

Anhydrous proton conductor consisting of pectin–inorganic composite material

Yamada

Ogino

2015

J of Applied Polymer Sci

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An organic-inorganic proton conductive composite material consisting of a biopolymer was prepared by mixing the pectin, tetraethyl titanate, and imidazole. Although the pectin material without the composite dissolved in water, the pectin-inorganic composite material did not show water solubility. In addition, in the composite material, the pectin and imidazole formed an acidbase structure by an electrostatic interaction, and as a result, these composite materials showed a thermal stability at intermediate temperatures (100-2008C). Furthermore, these composite materials indicated the proton conductivity of 5.6 3 10 24 S cm 21 at 1808Cunder anhydrous conditions. The activation energy of the proton conduction under anhydrous conditions was 0.32-0.22 eV and these values were one order of magnitude higher than that of the typical humidified perfluorinated membrane, such as Nafion V R . The organic-inorganic composite material consisting of a biocomponent may have the potential to be utilized as a novel proton conductor under anhydrous conditions.

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“…[1][2][3][4] Therefore, double-stranded DNA has been used as a functional material, such as the accumulations of harmful compounds, 5,6 electric devices, 7,8 optical materials, [9][10][11] ion conducting materials, 12,13 bio-and medical materials, 14,15 nanomaterials, [16][17][18][19] and environmental materials. 3,4,7,8 Recently, we reported the preparation of the DNA-inorganic hybrid film 20 and DNA-immobilized glass beads 21 by mixing the double-stranded DNA and silane coupling reagents.…”

Section: Introductionmentioning

confidence: 99%

Preparation of DNA-immobilized magnetic particles and their utilization as an accumulative material of metal ions

et al. 2016

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DNA-immobilized Fe 3 O 4 particles (DNA-Fe-particles) were prepared by mixing DNA, magnetic Fe 3 O 4 particles, and the silane coupling reagent, bis [3-(trimethoxysilyl)propyl]amine. The DNA-inorganic hybrid material was uniformly immobilized onto magnetic Fe 3 O 4 particles with the diameters of approximately 450 nm. These DNA-Fe-particles were stable in water. Additionally, we could simply collect the DNA-Fe-particles by a magnet from an aqueous solution. Therefore, we demonstrated the accumulation of various metal ions, such as heavy and rare-earth metal ions, by the DNA-Fe-particles. As a result, although these DNA-Fe-particles could selectively accumulate heavy and rare-earth metal ions, these materials could not accumulate the light metal ions, such as Mg(II) and Ca(II) ions. Furthermore, the metal ion-accumulated DNA-Fe-particles could be recycled by washing them with an aqueous ethylenediaminetetraacetic acid solution.

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Proton conduction of DNA–imidazole composite material under anhydrous condition

Cited by 17 publications

References 41 publications

Imidazole-doped nanocrystalline cellulose solid proton conductor: synthesis, thermal properties, and conductivity

Imidazole-doped nanocrystalline cellulose solid proton conductor: synthesis, thermal properties, and conductivity

Anhydrous proton conductor consisting of pectin–inorganic composite material

Preparation of DNA-immobilized magnetic particles and their utilization as an accumulative material of metal ions

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