冠醚PVC膜锂离子选择电极的研究

STUDY ON THE PVC MEMBRANE LITHIUM ELECTRODES PREPARED BY THE LIPOPHILIC CROWN ETHERS

以冠醚为中性载体的PVC膜锂电极的研究,近年来十分活跃,所用的冠醚有16-冠、14-冠-4、12-冠-4等,但这些电极受一价离子的干扰严重,线性范围在10°～10~3M LiCl之间,Kimura等和黄枢等分别以长链烷基取代14-冠-4和苯并12-冠为活性物质研制的锂电极,抗一价离子的干扰性能有较大提高。为了探讨冠醚结构对电极能的影响,我们合成了七个新型冠醚Ⅰ—Ⅶ,并以它们为中性载体,研制了PVC膜锂离子择电极。

Seven crown ethers haven been used as neutral carrics for Lithium ion. Their behaviourns of the PVC membrane electrodes were evaluated. Two of the electrodes prepared by crown ethers [6,13-dihydroxyl-2, 3, 9,10-(3′-n-peutadecyl)-dibenzo-14-crowu-4]aud [6, 13,-dihydroxyl-2, 3, 9,10-(3′, 5′, -di-t-butyl)-dibenzo-14-crown-4) exhibited a linear response to the lithiun ion Within the concentration range 10°-10^(-5)MLiCl. The lower Limited of linear response were 10^(-6)MLiC