66769-99-1Relevant academic research and scientific papers
Ligand Structure and Complexation, L. Ion-selective Crown Ether Dyes
Dix, Johannes Peter,Voegtle, Fritz
, p. 457 - 470 (2007/10/02)
New dyes with an ion-selective crown ether system, the complexation of which with cations influences the ground and excited states of the chromophore to a different extent, have been synthesized.Different types of alkali/alkaline earth metal ions cause different colour changes, significant effects being normally observed with cations fitting selectively into the crown ether units with cromophores of azo dyes (1-3, 8a, b, 22, 24), naphthol blue (10), phenol blue (11), stilbene dyes (14a, b), (mero)cyanines (16, 17a, b), and of Koenig's salt (19, 20).Chromophores bound to open chain oligoethylene glycol ethers are also described.The remarkable changes of light absorption in the course of complexation of some of the dyes are discussed in terms of donor participation of the auxochrome or antiauxochrome.
