Synthesis, Electrical Conductivity, and Crystal Structure of (AsPh4)0.25[Ni(dmit)2]
- 1 November 1986
- journal article
- low dimensional-solids-and-molecular-crystals
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 140 (2-4), 335-351
- https://doi.org/10.1080/00268948608080163
Abstract
The synthesis, conductivity behavior and crystal structure of the ion radical salt (AsPh4)0.25 [Ni(dmit)2] are described. This compound crystallizes in the monoclinic system, space group Pn or P2/n, a = 13.507(7), b = 6.610(1), c = 44.536(7) Å, β = 96.08(2)[ddot]. The structure consists of thick layers of stacked Ni(dmit)2 entities parallel to (001) and separated by AsPh4 + cations. Short S… S interstack distances are observed such that two-dimensional networks of closely spaced Ni(dmit)2 are formed in the (001) plane of this structure. The two-dimensional character of the structure is reflected in the low anisotropy in the conductivities measured in the (001) plane (σ = 1 : 1 : 10−3. The room-temperature four-probe conductivities measured along the needle axis (b axis) is 10-15 ω−1 cm−1. Temperature-dependent measurements show a thermally activated conductivity with very low activation energies (ca. 0-0.01 eV).Keywords
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