摘要
研究了聚酰胺胺树状大分子的代数、4.0代聚酰胺胺树状大分子与Cu2+摩尔比、溶液的pH值、反应时间和温度对4.0代聚酰胺胺树状大分子与Cu2+相互作用的影响。结果表明当聚酰胺胺树状大分子存在时,配合物水溶液的最大吸收波长出现了蓝移。当4.0代聚酰胺胺树状大分子和Cu2+摩尔比由1∶10变为1∶30时,配合物水溶液在610 nm处出现新的吸收主峰,并且发生红移。当溶液的pH值降到3.0左右时,4.0代聚酰胺胺树状分子不能与Cu2+络合,Cu2+被释放出来,这为聚酰胺胺树状分子的循环使用提供了理论依据。温度升高可使配合物的吸收光谱在可见光区的强度增加,但时间对配位体系影响很小。
The effects of the generations of polyamidoamine （ PAMAM ） dendrimers, molar ratio of G4.0 PAMAM and Cu^2＋ , solution pH, reaction temperature and time on the interaction of G4. 0 PAMAM dendrimers with Cu^2＋ were studied. The results showed that the maximum absorption wavelength of PAMAM dendrimers - Cu^2＋ complex in aqueous solution shifted from 683 nm to 561 nm as the generation of PAMAM dendrimers varied from 3.5 to 4.0, and that a new absorption peak at 610 nm was observed as the molar ratio of G4.0 PAMAM and Cu^2＋ varied from 1 ： 10 to 1 ： 30. It was also found that the complex was very sensitive to solution pH. At pH 3.0, G4. 0 PAMAM dendrimers could not complex with Cu^2＋, indicating that the bound Cu^2＋ could be released and that PAMAM dendrimers could be recycled. The intensity of the absorption spectrum of the complex in the visible range was enhanced with increase of the reaction temperature, but the interaction of G4. 0 PAMAM dendrimers with Cu^2＋ was affected insignificantly by the reaction time.
出处
《分析测试学报》
CAS
CSCD
北大核心
2008年第10期1106-1109,共4页
Journal of Instrumental Analysis
