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本文合成了一系列聚环氧乙烷(PEO)碱金属盐络合物,如PEO-LiI,PEO-NaI,PEO-KI,PEO-LiClO_4和PEO-NaB(C_6H_5)_4;比较了它们的电导率,讨论了微量水份对络合物形成的影响;并从导电机理上探讨了碱金属盐正负离子大小对络合物导电性能的影响。发现PEO-碱金属盐络合物中,正离子是一种电荷载流子,在螺旋通道中运动。当正离子半径与通道半径相匹配时,其电导率值最高,因此PEO-NaI的电导率比相应的PEO-LiI和PEO-KI高。而阴离子越大,则相应络合物的电导率就越小。
A series of polyethylene oxide (PEO) alkali metal salt complexes such as PEO-LiI, PEO-NaI, PEO-KI, PEO-LiClO 4 and PEO-NaB (C 6 H 5) 4 were synthesized in this paper. The influence of trace amount of water on the complex formation was discussed. The influence of the amount of alkali ions on the conductivity of the complex was also discussed from the conductive mechanism. It was found that in the PEO-alkali metal salt complex, the positive ion is a charge carrier that moves in the helical channel. The conductivity of PEO-NaI is higher than that of the corresponding PEO-LiI and PEO-KI when the positive ion radius matches the channel radius. The larger the anion, the smaller the conductivity of the corresponding complex.