Original Contribution

Colloid and Polymer Science

, Volume 286, Issue 6, pp 747-752

Synthesis and characterization of poly(ethyleneimine) dendrimers

  • Omprakash YemulAffiliated withResearch Center for Materials Science, Nagoya University
  • , Toyoko ImaeAffiliated withResearch Center for Materials Science, Nagoya University Email author 

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Abstract

Poly(ethyleneimine) (PEI) dendrimers up to the third generation (G3) were prepared by a divergent synthesis method from an ethylenediamine (EDA) core. The amine terminals were bonded with vinylbromide by a Michael addition reaction. Then, the bromide terminals were converted to amine groups using a Gabriel amine synthesis method. PEI dendrimers displayed pH-dependent luminescence, and their emission intensities at pH 6 increased over time. Fluorescence intensities also increased with increasing dendrimer generation from G1 to G3. Air-bubbling in aqueous solutions of dendrimers made to incorporate detectable amount of oxygen in dendrimers. EDA also behaved similarly in luminescence and oxygen incorporation.

http://static-content.springer.com/image/art%3A10.1007%2Fs00396-007-1830-6/MediaObjects/396_2007_1830_Figa_HTML.gif
Figure

Synthesis and Characterization of Poly(ethyleneimine) Dendrimers

Omprakash Yemul and Toyoko Imae*

Keywords

Poly(ethyleneimine) dendrimer Synthesis Divergent synthesis Michael addition reaction Gabriel amine synthesis Characterization Fluorescence