Acta Chimica Sinica ›› 2005, Vol. 63 ›› Issue (5): 421-426. Previous Articles     Next Articles

Original Articles

PAMAM树形分子与Cd2+的配位作用研究及CdS/PAMAM纳米复合材料的制备与表征

丛日敏,罗运军*,李国平,谭惠民   

  1. (北京理工大学材料科学与工程学院 北京 100081)
  • 投稿日期:2004-07-16 修回日期:2004-11-15 发布日期:2010-12-10
  • 通讯作者: 罗运军

Study on the Complexes between PAMAM Dendrimer and Cd2+ and the Preparation of CdS/PAMAM Dendrimer Nanocomposite

CONG Ri-Min, LUO Yun-Jun*, LI Guo-Ping, TAN Hui-Min   

  1. (School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081)
  • Received:2004-07-16 Revised:2004-11-15 Published:2010-12-10
  • Contact: LUO Yun-Jun

The complexation between PAMAM dendrimers and Cd2+ was studied by titrating PAMAM dendrimers with dilute cadmium acetate methanol solution under the monitoring of UV-Vis spectrophotometry. The results showed that the average number of Cd2+ complexed with a PAMAM dendrimer is 34 for a primary amine-terminated G5.0 dendrimer and 16 for an ester-terminated G4.5 dendrimer. A series of CdS/PAMAM dendrimer nanocomposites of different diameters were prepared by leading H2S into the methanol solution of Cd2+/PAMAM complexes with different Cd2+/PAMAM ratio. The gained CdS/ PAMAM dendrimer nanocomposites were characterized by UV-Vis spectrophotometry and TEM. The study implied that G4.5 PAMAM dendrimers were better templates. The stability, diameter and dispersion of the CdS clusters were affected remarkably by the changes of the ratio of Cd2+ to G4.5 PAMAM dendrimer and pH of the solution. The results showed that in neutral solution the stability and the dispersion of CdS/PAMAM dendrimer nanocomposites were better and the diameters were smaller.

Key words: CdS cluster, PAMAM dendrimer, template, dendrimer nanocomposite