Dix 等把冠醚与偶氮、二苯甲烷和三苯甲烷染料结合在一起制得了离子选择性染料。在合成偶氮型冠醚染料(通式为Ⅰ)时,先制成 N-苯基冠醚胺(通式为Ⅱ),再重氮化偶合。合成二苯甲烷和三苯甲烷型染料(通式为Ⅲ、Ⅳ)时,用通式Ⅱ中 X=H 的冠醚胺与羰基化合物经 Friedel-Crafts 反应制成。环上氮原子的孤对电子参予生色系统,当 Dix and other crown ether and azo, diphenylmethane and triphenylmethane dye together to produce ion-selective dyes. In the synthesis of azo-type crown ether dyes (general formula I), first made of N-phenyl ether ethers (general formula II), then diazotization coupling. Synthetic diphenylmethane and triphenylmethane type dyes (general formula III, IV), with the general formula Ⅱ X = H crown ethers and carbonyl compounds by Friedel-Crafts reaction. Lone ring electrons on the nitrogen atom participate in the chromogenic system when