Structural and Physical Properties of New Conducting Cation Radical Salts with Te-Based Counteranions, Tetraiodotellurate(II) and Hexaiododitellurate(II)
Structural and Physical Properties of New Conducting Cation Radical Salts with Te-Based Counteranions, Tetraiodotellurate(II) and Hexaiododitellurate(II)
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新型导电阳离子自由基盐与碲基抗衡阴离子、四碘碲酸盐(II)和六碘二碲酸盐(II)的结构和物理性质
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发表时间：
2002
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通讯作者：
R. Kato
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作者：
M. Fujiwara;N. Tajima;T. Imakubo;M. Tamura;R. Kato
摘要 本文报道了有机给体四甲基四硫富瓦烯（TMTTF）、乙撑二硫四硫富瓦烯（EDT-TTF）、双（乙撑二硫）四硫富瓦烯（ET）、双（乙二硫）四硒富瓦烯（BETS）和六亚甲基四硒富瓦烯（HMTSF）的几种阳离子自由基盐的制备、结构和导电性能，具有两种新型平面结构。 Te 基双阴离子、TeI42− 和 Te2I62−。 (ET)5Te2I6 1 和(BETS)5Te2I6 2 是同构的。在这些 Te2I62− 盐中，分子间短 I…I 接触形成超分子波纹阴离子片。供体排列类似于θ型。随着温度的降低，1 的电阻率逐渐增加，然后在 110 K 时急剧上升。2 的电阻率在低至 120 K 时呈金属性，并显示出电阻率逐渐增加，然后在 60 K 左右明显过渡到绝缘状态。(ET)4TeI4 3 的晶体结构基于与 α 型类似的 ET 分子的“人字形”排列。图3显示了室温附近的半导体行为，随后在210 K转变为绝缘状态。(EDT-TTF)4TeI4 4，一种半导体，表现出二聚EDT-TTF分子的独特的二维排列。
Abstract This article reports preparation, structure, and conducting property of several cation radical salts of organic donors tetramethyltetrathiafulvalene (TMTTF), ethylenedithiotetrathiafulvalene (EDT-TTF), bis(ethylenedithio)tetrathiafulvalene (ET), bis(ethylenedithio)tetraselenafulvalene (BETS) and hexamethylenetetraselenafulvalene (HMTSF) with two novel planar Te-based dianions, TeI42− and Te2I62−. (ET)5Te2I6 1 and (BETS)5Te2I6 2 are isostructural. In these Te2I62− salts, intermolecular short I···I contacts form a supramolecular corrugated anion sheet. Donor arrangement is similar to the θ-type. With lowering temperature, the resistivity of 1 shows a gradual increase followed by a sharp upturn at 110 K. 2 is metallic down to 120 K and shows a gradual increase of the resistivity followed by a clear transition to an insulating state around 60 K. Crystal structure of (ET)4TeI4 3 is based on the “herring bone” arrangement of ET molecules similar to the α-type. 3 shows a semiconductive behavior around room temperature followed by a transition to an insulating state at 210 K. (EDT-TTF)4TeI4 4, a semiconductor, exhibits a unique two-dimensional arrangement of dimerized EDT-TTF molecules.