, Volume 286, Issue 6-7, pp 747-752
Date: 17 Jan 2008

Synthesis and characterization of poly(ethyleneimine) dendrimers

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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.

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Figure

Synthesis and Characterization of Poly(ethyleneimine) Dendrimers

Omprakash Yemul and Toyoko Imae*