Synthesis and low dimensional conductive behaviour of columnar bis(β-diketonato)copper(II) complexes with oligo(ethylene oxide) groups

被引:18
作者
Liu, YB [1 ]
Liu, CQ [1 ]
Cui, L [1 ]
Fan, Z [1 ]
Xie, P [1 ]
Zhang, RB [1 ]
机构
[1] Chinese Acad Sci, PCLCC, Inst Chem, Beijing 100080, Peoples R China
关键词
D O I
10.1080/026782900203146
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Several kinds of beta-diketone with oligo(ethylene oxide) groups and their Cu-complexes were synthesized and characterized by H-1 NMR, IR, MS, and elemental analysis. The columnar mesomorphism of the bis[1-(p-ethoxy-di(ethyleneoxy)phenyl)-3-(p-n-hexyloxylphenyl)propane-1,3-dionato] copper(II) complex (abbreviated as C6EDK-Cu) was studied by differential scanning calorimetry, polarizing optical microscopy and temperature variable X-ray diffraction. In comparison with the conductivity value of c. 10(-8) S cm(-1) of the pure columnar liquid crystal (C6EDK-Cu), that of C6EDK-Cu doped with LiClO4 or iodine is increased by about three orders of magnitude and reaches 10(-5) S cm(-1) when heated to the columnar mesophase. It is noteworthy that the conductivity of C6EDK-Cu doped with iodine is maintained when the sample is cooled from the mesophase to room temperature, while that of C6EDK-Cu doped with LiClO4 is decreased. The two kinds of conductive mechanism of C6EDK-Cu doped with LiClO4 or iodine are discussed.
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页码:5 / 10
页数:6
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