Synthesis, characterization and dc electrical conductivity of some oligmer mixed metal complexes

被引:15
作者
El-Shekeil, A [1 ]
Al-Khader, M [1 ]
Abu-Bakr, AO [1 ]
机构
[1] Sanaa Univ, Fac Sci, Dept Chem, Sanaa, Yemen
关键词
polyazomethine mixed metal complexes; dc electrical conductivity; Doping Electronic spectra and thermal analyses;
D O I
10.1016/j.synthmet.2003.11.001
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The synthesis of the oligomer metal complexes was systematically carried out in three steps starting from condensing terephthaldehyde with 2,5-diamino-3,4-dicyanothiophene in DMF. Dithienylenephenylene (TBT) produced was complexed with copper acetate to give di-TBT copper complex [Cu(TBT)(2)]. This was complexed once more with a metal salt to give the 12-ring tri-metal oligomerM[Cu(TBT)(2)](2), where M is Co, Ni, or Cu. The presence of different transition metal ions allowed the comparison of the chemical and physical properties of the mixed metal complexes. The 12-ring mixed metal complexes were characterized through a comparative study of FTIR, electronic spectra and thermal analyses (TGA and DSC) in addition to the elemental analyses and metal content. A comparative study of the dc electrical conductivity in its intrinsic and 5% I-2-doped states with temperature variation in the range 300-500 K allowed tracing the action of the three different transition metals on the dc electrical conductivity of the mixed metal complexes. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:147 / 152
页数:6
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