冠醚对金属离子,特别是碱金属离子,有络合作用,可以作为离子选择电极的活性物质.在苯并冠醚的苯环上导入烷基,能缩短电极的响应时间.K.Kimura等发现用双冠醚制成的钾离子选择电极的性能优于相应的单冠醚电极,例如双冠醚(1)电极对钠离子的选择系数K_(K~+,Na~+)~(Pot)为6×10~(-4),而单冠酸(2)电极则为6×1O~(-3).他们 Crown ether on metal ions, especially alkali metal ions, complexing, can be used as the ion-selective electrode active substances in the benzene crown of benzene into the alkyl ring, can shorten the electrode response time.K. Kimura et al It was found that the performance of potassium ion selective electrode made with bis-crown ether is better than that of the corresponding single-crown ether electrode such as K_ (K ~ +, Na ~ +) ~ (Potassium) ) Was 6 × 10 ~ (-4), while the monolaurate (2) electrode was 6 × 10 ~ (-3)