75205-45-7Relevant academic research and scientific papers
SYNTHESIS OF AZOBENZO-CROWN ETHERS AND THEIR COMPLEXATION BEHAVIOR WITH METAL IONS.
Shiga,Nakamura,Takagi,Ueno
, p. 412 - 415 (1984)
New crown ethers which have a benzeneazo group as a building block of a macrocyclic polyether ring. The complexation properties of these new azobenzo-crown ethers with alkali and alkaline earth metal iodide salts were investigated in acetonitrile solution spectrophotometrically. The complex formation constants were evaluated for alkali metal salts. The azo group is not particularly a favorable component of a crown ether macrocycle for stabilizing the metal complexes.
AZO-CROWN ETHERS. THE DYES WITH AZO GROUP DIRECTLY INVOLVED IN THE CROWN ETHER SKELETON
Shiga, Masanobu,Takagi, Makoto,Ueno, Keihei
, p. 1021 - 1022 (1980)
Crown-type polyether azo dyes 1-3 were synthesized, and the ion-pair extraction of sodium and potassium ion was studied.The extraction behavior resembles those of benzo-type crown ethers, but changes on light illumination due to trans-cis isomerization of the dyes.The cis-form lacks the affinity to metal ion.
