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Issue 11, 2013
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Ionic semiconductor: DC and AC conductivity of anilinium tetrathiafulvalene-2-carboxylate

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Abstract

A single crystal of anilinium tetrathiafulvalene-2-carboxylate exhibits a characteristic electrical conduction; it is a semiconductor with activation-type transport above 200 K; σrt = 0.16 S cm−1 with an activation energy of 0.11 eV. On the other hand, below 200 K, it does not obey the Arrhenius relation but is conductive even at 4 K with 2.1 × 10−4 S cm−1 at a frequency of 2 MHz. Its behavior exhibits strong frequency dependence and suggests a particular conduction coupled with dielectric relaxation, reflecting its ionic nature. The crystal structure of the salt shows that conducting molecules are assembled supramolecularly with multiple nonbonding interactions, such as the hydrogen bond, and the π/π and CH/π interactions. The hydrogen bond and CH/π interactions have a short bond length, which is similar to the charge-assisted-type interaction observed in organometallics.

Graphical abstract: Ionic semiconductor: DC and AC conductivity of anilinium tetrathiafulvalene-2-carboxylate

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Publication details

The article was received on 17 Oct 2012, accepted on 07 Dec 2012, published on 11 Dec 2012 and first published online on 11 Dec 2012


Article type: Paper
DOI: 10.1039/C2DT32464D
Citation: Dalton Trans., 2013,42, 3821-3826
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    Ionic semiconductor: DC and AC conductivity of anilinium tetrathiafulvalene-2-carboxylate

    Y. Kobayashi, S. Sumi, T. Terauchi and D. Hashizume, Dalton Trans., 2013, 42, 3821
    DOI: 10.1039/C2DT32464D

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