The polyaddition of macrocyclic diols with diisocyanates is an easy way to prepare ionselective polymers bearing pendant crown ethers. Those polymers can be readily immobilized on silicagel, with no change of ionoselective properties.
Polymeric and immobilized crown compounds, material for ion separation
We describe the synthesis of ionoselective polymers bearing different pendant crownethers. The synthesis was applied to various macrocycles. We discuss the influence of macrocyclic cavity size and rigidity of the polymers on the extraction behavior. Accessibility of active sites can be achievied with immobilized functionalized polyurethanes chemically bound to an inorganic solid support, with no change