Metallic Conductivity in a Two-Dimensional Cobalt Dithiolene Metal-Organic Framework
Metallic Conductivity in a Two-Dimensional Cobalt Dithiolene Metal-Organic Framework
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DOI：
10.1021/jacs.7b05742
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发表时间：
2017-08-09
影响因子：
15
通讯作者：
Marinescu, Smaranda C.
中科院分区：
文献类型：
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作者：
Clough, Andrew J.;Skelton, Jonathan M.;Marinescu, Smaranda C.
二维金属有机骨架(MOF)由于具有较高的载流子迁移率和较低的电阻率而备受关注。在这里，我们报道了2，3，6，7，10，11-三苯基六硫代钴骨架的电荷输运性质随温度的变化。变温电阻率研究表明，随着温度的降低，从半导体相到金属相的转变在MOF中是前所未有的。我们发现，这种转变高度依赖于薄膜厚度和孔洞中捕获的溶剂的量，电子结构的密度泛函理论计算支持材料的复杂金属导电性。这些结果证实了第一个实验观察到的具有带状金属导电性的MOF。
Two-dimensional (2D) metal-organic frameworks (MOFs) have received a great deal of attention due to their relatively high charge carrier mobility and low resistivity. Here we report on the temperature-dependent charge transport properties of a 2D cobalt 2,3,6,7,10,11-triphenylenehexathiolate framework. Variable temperature resistivity studies reveal a transition from a semiconducting to a metallic phase with decreasing temperature, which is unprecedented in MOFs. We find this transition to be highly dependent on the film thickness and the amount of solvent trapped in the pores, with density functional theory calculations of the electronic-structure supporting the complex metallic conductivity of the material. These results identify the first experimentally observed MOF that exhibits band-like metallic conductivity.