Original Contribution

Colloid and Polymer Science

, Volume 286, Issue 6, pp 747-752

First online:

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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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.


Synthesis and Characterization of Poly(ethyleneimine) Dendrimers

Omprakash Yemul and Toyoko Imae*


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