胺基端基树状分子在铜纳米粒子形成过程中的模板及稳定化作用  

Templatation and stabilization of amino-terminated poly(amido-amine) dendrimer in formation of copper nanoparticles

作　　者：魏秀珍 朱宝库[1] 谢曙辉[1] 徐又一[1] 

机构地区：[1]浙江大学材化学院高分子科学研究所,浙江杭州310027

出　　处：《功能材料》2005年第8期1242-1244,1250,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50103010)

摘　　要：通过Micheal加成和胺解的交替反应,制得末端基为氨基的聚酰胺-胺型树状分子(PAMAM);研究了第7代PAMAM(G7-NH2)在制备铜纳米粒子过程中的模板作用,通过紫外光谱和透射电镜表征了铜粒子的形成过程以及所得铜粒子的大小。结果表明,铜离子不仅与G7-NH2内部叔胺基形成络合物,还与树状分子外部的伯胺基形成络合物;在得到铜粒子的过程中,G7-NH2具有内模板和外模板作用,铜纳米粒子的尺寸随着铜离子与G7-NH2浓度比例的提高而增大;同时,由于铜纳米粒子为G7-NH2模板所包裹,使其在水中具有良好的分散均匀性和稳定性。但在有氧条件下,铜粒子很容易被氧化为G7-NH2(Cu2+)n络合离子。The seventh generation primary-amine-ended poly（amido-amine） （PAMAM G7-NH2） dendrimer was synthesized and employed to investigate the templatation and stabilization effect in the formation of copper nanoparticles. Ultra-violet spectra and transmission electron microscope （TEM） were adopted to characterize the absorption properties of Cu^2＋/G7-NH2 complexes （G7-NH2（Cu^2＋）n） and the morphologies of the formed Cu/G7-NH2 particles （G7-NH2（Cu）n）. It was found that the copper nanoparticles could be formed through the G7-NH2 exterior template process. The size and the aggregation of G7-NH2（Cu）n nanoparticles increased with the increasing of the molar ratio of [Cu^2＋]/[G7-NH2]. The resultant solutions of G7-NH2（Cu）n in water can still stay in stability though the copper nanoparticles form into aggregates. If oxygen existed,the formed copper particles could be oxidized back to G7-NH2（Cu^2＋）n easily.

关 键 词：树状分子 PAMAM 模板作用 铜粒子 稳定化 

分 类 号：O614.121[理学—无机化学] O657.3[理学—化学]