| 摘要 |
PURPOSE:To obtain the titled bisazocrown ether useful as a selective ion extractant, by reacting crosslinked polystyrene with a coupling product between diaminodibenzocrown ether and a hydroxyaromatic compound. CONSTITUTION:A diaminodibenzocrown ether of formula I , wherein C is dibenzocrown ether, is tetrazotized, and the product is coupled with a hydroxyaromatic compound of formula II (wherein B is aryl), e.g., phenol, to obtain a compound of formula III. Then, the compound (III) is reacted with chloromethylated divinylbenzene-crosslinked polystyrene to obtain a resin-bound bisazocrown ether of formula IV, wherein A is a divinylbenzene-crosslinked polystyrene compound. This compound changes its stereochemical structure upon absorption of light energy, and therefore it is possible to extract or concentrate metallic ions or cations selectively by the utilization of this change. |
