冠醚聚合物的研究 Ⅱ.以聚硫醚为主链的硫杂冠醚聚合物的合成及其络合性能

STUDIES ON POLYMERIC CROWN ETHERS II.Syntheses and Complexation Properties of Polymeric Thiacrown Ethers with Polythiaether Backbone

本文报道了一种合成硫杂冠醚聚合物的新方法。以聚(2′-氯乙基-2,3-环硫丙基醚)为预聚物与二巯基化合物通过大分子反应直接环化,一步法合成了四种以聚硫醚为主链的新型硫杂冠醚聚合物(PD1-PD4)。并测定了它们对Ag^+、Au^(3+)、Pd^(2+)、Pt^(4+)、Cu^(2+)、Hg^(2+)、Zn^(2+)、Cd^(2+)、Pb^(2+)、Mg^(2+)、K^+、Ns^+等金属离子的络合性能。结果表明:它们除不络合K^+、Na^+、Mg^(2+)、Pb^(2+)外,对其它八种离子有不同程度的络合,其中对Ag^+、Au^(3+)、Pd^(2+)等贵金属离子的络合容量较高。

In this paper, four new polymeric thiacrown ethers (PD1-PD4), in which some oxygen atoms of crown ring were replaced by sulfur atoms, with polythiaether backbone were synthesized via the intramolecular cyclization of poly (2'-chloroethyl-2, 3-epithiopropanyl ether) with various dimercaptans. The complexation capacities of these polymeric thiacrown ethers for Ag+, Au2+, Pd2+, Pt4+ Cu2+, Hg2+, Zn2+, Cd2+, Pb2+, Mg2+, K+ and Na+ were determined. The results showed that they possess much stronger complexation ability for the noble metal ions such as Ag+, Au2+, Pd2+ except Pt4+.