Synthesis of the novel thermo-responsive polymers for the extraction system of noble metal ions.

合成了N-异丙基丙烯酰胺与单氮杂聚硫醚衍生物的温敏性共聚物，用于选择性萃取银（I）、铜（I）、金（III）和钯（II）等软金属离子。考察了该共聚物与苦味酸根、硝酸根、高氯酸根等阴离子配合时对金属离子的萃取效果。软金属离子如银（I）、铜（I）、金（III）和钯（II）离子被选择性地萃取到固体聚合物相中。金属离子如银离子的萃取效率随着聚合物中单氮杂四硫醚基团与N-异丙基丙烯酰胺基团的比例的增加而增加。进行了B类金属离子的定量萃取以及单氮杂四硫醚分子对金属离子的液-液萃取。

Novel temperature-responsive copolymers of N-isopropylacrylamide and monoaza-poly-thioether derivative, were synthesized for the selective extraction of soft metal ions such as silver (I), copper (I), gold (III) and palladium (II) ion. Metal ion extraction using the copolymer with appropriate counter anions such as picrate ion, nitrate or perchlorate ion was examined. Soft metal ions such as silver (I), copper (I), gold (III) and palladium (II) ion were extracted selectively into the solid polymer phase. The extraction efficiency of a metal ion such as silver ion increased as the increase of the ratio of the monoaza-tetrathioether group to N-isopropylacrylamide group in the polymer. The quantitative extraction of class b metal ions as well as the liquid-liquid extraction of metal ions with monoaza-tetrathioether molecule was performed.