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Crystals 2012, 2(3), 1283-1290; doi:10.3390/cryst2031283
Article

Structural and Electrical Properties of the τ-(P-S,S-DMEDT-TTF)2 (AuCl2) (AuCl2)y Compound with (y ≈ 0.9)

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Received: 24 May 2012; in revised form: 6 July 2012 / Accepted: 16 August 2012 / Published: 3 September 2012
(This article belongs to the Special Issue Molecular Conductors)
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Abstract: The compound τ-(P-S,S-DMEDT-TTF)2(AuCl2) (AuCl2)y (where P-S,S-DMEDT-TTF is the compound pyrazino-(S,S)-dimethyl-ethylenedithio-tetrathiofulvale) crystallizes in the non-centrosymmetric space group I-42d, with a = 7.3260(1) Å and c = 67.5487(12) Å (RT data) and remains tetragonal in the temperature range from RT to 100 K. This compound is a quasi-two-dimensional material and the relation of the lattice of the order part of the structure created by the donor molecules with that of the disordered anion lattice revealed by intense diffusion streaks give a value of y ≈ 0.9. In contrast to the Br and I analogs or the related compounds which contain the compound ethylenedioxy-S,S-dimethylenedithiotetrathiafulvalene (abbreviated as EDO-S,S-DMEDT-TTF) as donor and which exhibit anisotropic metallic behavior down to low temperature, this compound is anisotropic semiconductor in the same temperature range. The appearance of satellites on the diffraction images recorded below 110 K indicates a structural change. Resistivity measurements show that this material is a semiconductor with anisotropy σac of ca. 400–1400 at room temperature.
Keywords: organic semiconductor; quasi-two-dimensional; crystal structure; diffusion intensity; low temperature diffraction organic semiconductor; quasi-two-dimensional; crystal structure; diffusion intensity; low temperature diffraction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Psycharis, V.; Mousdis, G.A.; Murata, K.; Papavassiliou, G.C. Structural and Electrical Properties of the τ-(P-S,S-DMEDT-TTF)2 (AuCl2) (AuCl2)y Compound with (y ≈ 0.9). Crystals 2012, 2, 1283-1290.

AMA Style

Psycharis V, Mousdis GA, Murata K, Papavassiliou GC. Structural and Electrical Properties of the τ-(P-S,S-DMEDT-TTF)2 (AuCl2) (AuCl2)y Compound with (y ≈ 0.9). Crystals. 2012; 2(3):1283-1290.

Chicago/Turabian Style

Psycharis, Vassilis; Mousdis, George A.; Murata, Keizo; Papavassiliou, George C. 2012. "Structural and Electrical Properties of the τ-(P-S,S-DMEDT-TTF)2 (AuCl2) (AuCl2)y Compound with (y ≈ 0.9)." Crystals 2, no. 3: 1283-1290.


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