含嘧啶环的双冠醚 V.双冠醚为载体的碱金属离子选择性电极的研究

BIS CROWN ETHER CONTAINING PYRIMIDINE RING Ⅴ SODIUM, POTASSIUM AND CAESIUM ION SELECTIVE PVC MEMBRANE ELECTRODES BASED ON BIS CROWN ETHERS AS CARRIER

本文报道由５－硝基－６－三氟甲基嘧啶环桥联苯并－１２－冠－４、苯并－１５－冠－５和苯并－１８－冠－６的三种新的双冠醚的合成。用它们作为载体分别制成钠、钾和铯离子选择性电极，测定了电极的响应功能、选择性系数和适用的ｐＨ范围。结果表明三种电极都有较好的性能。

Sodium, potassium and caesium ion selective PVC membrane electrodes based on nine new bis crown ethers containing benzo 12 crown 4(1), benzo 15 crown 5(2) and benzo 18 crown 6(3) moieties bridged by pyrimidine ring were prepared and their electrode behaviours were evaluated The electrodes (1), (2) and (3) exhibited good Nernstian responses and respectively better selectivity with respect to all other alkali and alkaline earth metal cations