EPR Characterization of Heterogeneously Functionalized Dendrimers

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• 作者：Hye Jung Han ; Karl B. Sebby ; David J. Singel ; Mary J. Cloninger
• 刊名：Macromolecules
• 出版年：2007
• 出版时间：May 1, 2007
• 年：2007
• 卷：40
• 期：9
• 页码：3030 - 3033
• 全文大小：76K
• 年卷期：v.40,no.9(May 1, 2007)
• ISSN：1520-5835

文摘

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 withPROXYL groups upon removal of the tether. Analysis of the EPR spectra of the spin-labeled dendrimers suggeststhat initial end group proximity does not appreciably alter end group presentation on heterogeneously functionalizedPAMAM dendrimers after tethers are released.