Thiophene Dendron Jacketed Poly(amidoamine) Dendrimers:  Nanoparticle Synthesis and Adsorption on Graphite

The peripheral functionalization of amine-terminated fourth-generation poly(amidoamine) (PAMAM) with thiophene dendrons and the preparation of dendrimer-encapsulated metal nanoparticles are described. Interesting nanoparticle stabilization and energy-transfer properties were observed with these hybr...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2005-02, Vol.127 (6), p.1744-1751
Main Authors: Deng, Suxiang, Locklin, Jason, Patton, Derek, Baba, Akira, Advincula, Rigoberto C
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Description
Summary:The peripheral functionalization of amine-terminated fourth-generation poly(amidoamine) (PAMAM) with thiophene dendrons and the preparation of dendrimer-encapsulated metal nanoparticles are described. Interesting nanoparticle stabilization and energy-transfer properties were observed with these hybrid materials. The synthesis involved imine coupling of the dendron derivatives to the peripheral amine groups of PAMAM followed by reduction. The formation of these metal−organic nanoparticle hybrid materials was monitored by UV−vis spectroscopy. The complexation of metal ions and the stabilization effect of PAMAM on metal nanoparticles were investigated by FT-IR. Energy transfer was observed between the metal surface plasmon absorption and fluorescence of the terthiophene dendrons. Noncontact magnetic-AC mode AFM imaging revealed the formation of monodispersed and very stable nanoparticles adsorbed on an HOPG flat substrate.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja046144l