##STR1## The invention provides compounds represented by formula (I), wherein Y is --(CH.sub.2).sub.2 [O(CH.sub.2).sub.2 ].sub.n -- in which n is an integer from 1 to 6; Z is --N.dbd.N--Ar in which Ar is a substituted or unsubstituted aryl group; Q is hydrogen or an alkyl group having from 1 to 4 carbon atoms; each R independently is hydrogen or a substituent free of acidic protons; and X is R or Z. The compounds are ion-sensitive dyes suitable for use in optical ion sensors.
本发明提供了由公式(I)表示的化合物,其中Y为--(CH.sub.2).sub.2[O(CH.sub.2).sub.2].sub.n--,其中n为1到6的整数;Z为--N.dbd.N--Ar,其中Ar是取代或未取代的芳基基团;Q为氢或具有1到4个碳原子的烷基基团;每个R独立地为氢或不含酸性质子的取代基;X为R或Z。这些化合物是适用于光学离子传感器的离子敏感
染料。