EPR Characterization of Heterogeneously Functionalized Dendrimers

EPR spectroscopy was used to evaluate the dynamic motions of dendrimer end groups for a G(4)-PAMAM dendrimer. Clusters of end groups were covalently tethered together and then selectively labeled with PROXYL groups upon removal of the tether. Analysis of the EPR spectra of the spin-labeled dendrimer...

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Bibliographic Details
Published in:Macromolecules 2007-05, Vol.40 (9), p.3030-3033
Main Authors: Han, Hye Jung, Sebby, Karl B., Singel, David J., Cloninger, Mary J.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical modifications
Chemical reactions and properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
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Summary:EPR spectroscopy was used to evaluate the dynamic motions of dendrimer end groups for a G(4)-PAMAM dendrimer. Clusters of end groups were covalently tethered together and then selectively labeled with PROXYL groups upon removal of the tether. Analysis of the EPR spectra of the spin-labeled dendrimers suggests that initial end group proximity does not appreciably alter end group presentation on heterogeneously functionalized PAMAM dendrimers after tethers are released.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma070383m