Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (7): 1459.

• Articles • Previous Articles     Next Articles

Preparation and Characterization of Pd Nanoclusters Templated by PAMAM Dendrimers

LU Wen-Ting, LUO Yun-Jun*, LI Guo-Ping, ZHANG Xin-Qian, JIN Yu-Juan   

  1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
  • Received:2008-10-10 Online:2009-07-10 Published:2009-07-10
  • Contact: LUO Yun-Jun. E-mail: yjluo@bit.edu.cn

Abstract:

Pd nanoclusters templated by methoxycarbonyl-terminated poly(amidoamine)(PAMAM) dendri-mers were successfully prepared in methanol. The complexation between Pd2+ ions and dendrimers was investigated by UV-Vis and FTIR spectophotometric method. These results show that Pd2+ ions are coordinated with the interior amine groups of PAMAM dendrimers. As shown in HRTEM images, reduction with NaBH4 resulted in well-dispersed and nearly size monodisperse Pd nanoclusters(2 nm, fcc) encapsulated in dendrimers. The investigation of UV-Vis data indicates that the size of particle increases with the metal-to-dendrimer molar ratio. Besides, due to the close-packed spherical periphery and rich ligands in interior cavities, dendrimers of higher generation are more effective for preparing Pd DENs with smaller size and better dispersion.

Key words: Poly(amidoamine)(PAMAM) dendrimer; Template method; Pd nanocluster; Complexation

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