化学学报 ›› 2004, Vol. 62 ›› Issue (6): 587-592. 上一篇    

研究论文

分子导体(Py Me)[Ni(dmit)2]2的合成、结构与导电性

许文1,2, 方奇1,2, 薛刚1, 于文涛1, 刘国群1, 雷虹3   

  1. 1. 山东大学, 晶体材料国家重点实验室, 济南, 250100;
    2. 山东大学, 化学与化工学院, 济南, 250100;
    3. 山东大学信息科学与工程学院, 济南, 250100
  • 投稿日期:2003-09-08 修回日期:2003-12-23 发布日期:2014-02-18
  • 通讯作者: 方鍱-mail:fangqi@icm.sdu.edu.cn E-mail:fangqi@icm.sdu.edu.cn
  • 基金资助:
    国家自然科学基金(No.20172034)资助项目.

Synthesis, Structure and Conductivity of Molecular Conductor (PyMe)[Ni(dmit)2]2

XU Wen1,2, FANG Qi1,2, XUE Gang1, YU Wen-Tao1, LIU Guo-Qun1, LEI Hong3   

  1. 1. State Key Laboratory of Crystal Materials, Jinan 250100;
    2. School of Chemistry and Chemical Engineering, Jinan 250100;
    3. School of Information Science and Engineering, Shandong University, Jinan 250100
  • Received:2003-09-08 Revised:2003-12-23 Published:2014-02-18

合成了一种新的导电分子晶体(PyMe)[Ni(dmit)2]2 (Py=pyridine, dmit=(C3S5)2-=4,5-dimercapto-1,3-dithiole-2-thio~nato),并用四圆X射线衍射方法确定了结构,该晶体属于三斜晶系,P-1空间群;晶胞参数为:a=0.74837(9) nm, b=1.15479(16) nm, c=1.9775(3) nm, α=99.268(12)°, β=99.140(10)°, γ=99.673(11)°; V=1.6320(4) nm3, Dc=2.029 g/cm3, Z=2. 导电组元[Ni(dmit)2]0.5-沿[-110]方向堆积成柱(column),柱与柱之间进一步借助于大量的S...S分子间相互作用形成二维导电层,测得在(001)面上的室温电导率为10-1~10-4 Ω-1·cm-1.用结构参数和分子间重叠积分相结合的方法,分析了导电性与结构的关系.

关键词: 分子导体, 合成, 结构, 导电性

A new molecular conductor (PyMe)[Ni(dmit)2]2 (Py=pyridine, dmit=(C3S3) 2-=4,5-dimercapto-1,3-dithiole-2-thionato) has been synthesized and its structure determined by four-circle X-ray diffraction analysis. Crystallographic parameters for (PyMe)[Ni(dmit)2]2: triclinic system, P-1 space group; a=0.74837(9) nm, b=1.15479(16) nm, c=1.9775(3) nm, α=99.268(12)°, β=99.140(10)°, γ=99.673(11)°; V=1.6320(4) nm3, Dc=2.029 g/cm3, Z=2. Structure analysis reveals that four-fold [Ni(dmit)2]0.5- units stack to form columns along [-110] direction, and these columns further form 2-D conducting sheet by S…S intermolecular contacts. The conductivity on (001) plane is measured to be 10-1~10-4 Ω-1·cm-1. The relationship between conductivity and structure was discussed based on the structure parameters and intermolecular orbital overlap.

Key words: molecular conductor, synthesis, structure, conductivity