Linearly bonded triiodide chains with fairly small distance between the adjacent iodine ions feature a facile electron transfer and highly anisotropic properties. Here, we demonstrate a novel strategy towards a new one-dimensional linear triiodide DMEDA·I₆, using chain-type N,N′-dimethyl-ethanediamine (DMEDA) cation to coordinate triiodine ions. This triiodide has the shortest distance between adjacent I₃ and good linearity. An estimated electronic band gap of 1.36 eV indicates its semiconducting properties. 100 fold differences both in polarization-sensitive absorption and effective mass were achieved by simulation, with directions parallel and perpendicular to the a-axis of DMEDA·I₆. The DME-DA·I₆ single crystal-based photodetectors show a good switching characteristic and a distinct polarization-sensitive photoresponse with linear dichroic photodetection ratio of about 1.9. Strongly anisotropic features and semiconducting properties of DMEDA·I₆ make this triiodide system an interesting candidate for polarization related applications.

相邻碘离子之间的距离很小的线性键合三碘化物链具有便捷的电子转移和高度各向异性的特性。在这里，我们展示了一种使用链型N，N'-二甲基乙二胺（DMEDA）阳离子配位三碘离子的新型一维线性三碘化物DMEDA·I ₆的新策略。该三碘化物具有相邻的I ₃之间的最短距离和良好的线性。估计的电子带隙为1.36 eV，表明其半导体性能。通过仿真获得了偏振敏感吸收和有效质量的100倍差异，其方向平行和垂直于DMEDA·I ₆的a轴。DME-DA·I₆个基于单晶的光电探测器显示出良好的开关特性和独特的偏振敏感光响应，线性二向色性光电探测比约为1.9。DMEDA·I _6的强各向异性和半导体特性使该三碘化物系统成为极化相关应用的有趣候选者。