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Keywords:

  • hyperbranched;
  • CdS quantum dots;
  • nanocomposites;
  • nanoreactors;
  • luminescence

Abstract

Hyperbranched poly(amidoamine)s with methyl ester terminals (HPAMAM) were synthesized by one-pot approach and subsequently used as nanoreactors to prepare CdS quantum dots (QDs). HPAMAM could bind Cd2+ through their internal amines, while the external methyl ester groups prevented the aggregation of polymers. After reaction with S2−, CdS QDs sequestered within individual hyperbranched polymers were obtained. The resulting CdS/HPAMAM nanocomposites were characterized by dynamic light scattering, transmission electron microscopy, ultraviolet-visible spectroscopy, photoluminescence spectroscopy, and Fourier transform infrared spectroscopy, confirming the formation of CdS QDs with small particle size and narrow size-distribution. Furthermore, the effects of Cd2+/S2− ratio and aging time on the photoluminescence of CdS QDs were also investigated. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011