1988 年 46 巻 2 号 p. 96-107
Color changes induced by complexation with guest ions have been observed in special cyclic polyethers in which chromophores of various azo dyes and Phenol Blue are attached. Strongly fluorescent unbelliferone and benzothiazolylphenol groups are also used as a chromophore as well as a pair of π-electron donor and acceptor for a colored charge-transfer complex. The crown ether dyes, which have great potential utility because of their unique physicochemical properties, are surveyed here. The survey consists of the following sections : 1) principle of ion-selective coloration, 2) molecular design and synthesis, 3) metal ion-selective coloration, and 4) ion-selective fluorescent emission.