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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Tetrathiafulvalene-based double metal lead iodides: structures and electrical properties
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Tetrathiafulvalene-based double metal lead iodides: structures and electrical properties

机译：基于TetrathiafulValene的双金属铅碘化物：结构和电气性能

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Introducing electronically active organic components into lower dimensional metal halide compounds is an effective strategy to improve the electronic properties of hybrid metal halide materials. We have previously used this strategy to explore hybrid halides with tetrathiafulvalenes (TTFs) and a series of lead iodides and bismuth halides were isolated. The electronic properties were improved notably using this modification. In this work, we expand the study of TTF based main-group metal halides to double metal halides with mixed lead and copper transition metals. Two hybrid TTF-lead-cuprous iodides, formulated as [TTF](5)[Pb2Cu2I10]center dot H2O (1) and [TTF](2)[PbCu2I6] (2), and two monometal analogues of [TTF](2)[Cu4I6]center dot H2O (3) and [TTF](2)[Ag4I6] (4) were crystallographically characterized. The anion of 1 is a 0D cluster, while that of the others is a 1D chain structure. The anion structures of 1-4 are novel and are reported for the first time. The TTF moieties are stacked to form a 2D framework in 1 and 1D columns in 2-4. We found that the semiconductor properties of the hybrids are related to electron donation from an anion to a cation. The electronic state of the TTF cations is another significant factor that affects the electronic properties of the materials. More notably, this work proved that the conductivity and photoconductivity of the mixed metal iodides are superior to those of the monometal iodides.
机译：在低维金属卤化物化合物中引入电子活性有机组分是改善杂化金属卤化物材料电子性能的有效策略。我们之前曾使用该策略探索四硫富瓦烯（TTF）的混合卤化物，并分离出一系列碘化铅和卤化铋。通过这种改性，电子性能得到了显著改善。在这项工作中，我们将基于TTF的主族金属卤化物的研究扩展到铅和铜过渡金属混合的双金属卤化物。对组成[TTF]（5）[Pb2Cu2I10]中心点H2O（1）和[TTF]（2）[PbCu2I6]（2）的两种杂化TTF碘化铅亚铜，以及[TTF]（2）[Cu4I6]中心点H2O（3）和[TTF]（2）[Ag4I6]（4）的两种单金属类似物进行了晶体学表征。1的阴离子为0D团簇，而其他阴离子为1D链结构。1-4的阴离子结构新颖，首次报道。TTF部分被堆叠以在1和2-4中的1D列中形成2D框架。我们发现，杂化物的半导体性质与从阴离子到阳离子的电子给予有关。TTF阳离子的电子状态是影响材料电子性质的另一个重要因素。更值得注意的是，这项工作证明了混合金属碘化物的导电性和光电导性优于单金属碘化物。

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