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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.

Synthesis and Characterization of Poly(ethyleneimine) Dendrimers

Omprakash Yemul and Toyoko Imae*

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Acknowledgments

The authors are thankful to Dr. Y. Maeda in the Nagoya University for providing NMR spectra of samples. OY is grateful to the 21st Century COE Program (No. 14COEB01-00) for financial support of postdoctoral fellowship.

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  1. Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan

    Omprakash Yemul & Toyoko Imae

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  1. Omprakash Yemul
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  2. Toyoko Imae
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Correspondence to Toyoko Imae.

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Yemul, O., Imae, T. Synthesis and characterization of poly(ethyleneimine) dendrimers. Colloid Polym Sci 286, 747–752 (2008). https://doi.org/10.1007/s00396-007-1830-6

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