硒杂冠醚的合成及其络合性能研究

Syntheses of Selena-Crown Ethers and their Complexing Properties

自1967年Pedersen首次报道冠醚化合物的合成及其络合性能以来,冠醚化学作为一门新兴学科得到了迅速发展。冠醚化合物由最初的全氧冠醚发展到氮杂、硫杂、磷杂冠醚以及含硅、砷、锡、硒等杂原子的冠醚。

A simple synthetic route to selena-crown ethers is described. Eight selena-crownether compounds 9～16 were synthesized by means of the condensation of bis (2-hydroxyet-hyl) selenide with diol ditosylate. These compounds have not been reported, with the excep-tion of compound 13. Extraction abilities of part selena-crown compounds 9, 11, 12, 13,14, and benzo-15-crown-5 toward ions Na^+, K^+, Ag^+, Hg^(++), Pd^(++), Pt (Ⅳ) are determi-ned. Toward ions Ag^+, Hg^(++), Pd^(++), Pt (Ⅳ), especially the last two ions, the extractionabilities of these selena-crown ethers are higher than those of benzo-15-crown-5. On thecontrary, the extraction abilities of these selena-crown ethers toward ions Na^+, K^+ are smal-ler than those of benzo-15-crown-5.