Issue 3, 2009
From the journal:

Soft Matter

Gold nanoparticle-PPE constructs as biomolecular material mimics: understanding the electrostatic and hydrophobic interactions†

Ronnie L. Phillips,a   Oscar R. Miranda,b   David E. Mortenson,b   Chandramouleeswaran Subramani,b   Vincent M. Rotello*b  and  Uwe H. F. Bunz*a  

* Corresponding authors

a School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA 30332-400, USA
E-mail: uwe.bunz@chemistry.gatech.edu
Fax: +1(404)385-1795
Tel: +1(404)385-1795

b Department of Chemistry, University of Massachusetts, 710 North Pleasant Street, Amherst, MA 01003-9336, USA
E-mail: rotello@chem.umass.edu
Fax: +1(413)545-4490
Tel: +1(413)-545-2058

Abstract

Eleven cationic, monolayer-protected quaternary ammonium-functionalized gold nanoparticles (ANPs) were prepared and investigated for their ability to quench the fluorescence of a poly(p-phenyleneethynylene) (PPE) that features carboxylate groups to enable electrostatic interactions with the ANPs. Depending upon their structures, the ANPs displayed binding constants to the PPE from 8 × 107 to 1010 M−1, with particularly high affinity observed with aromatic functionalized ANPs capable of aromatic stacking. These binding constants were obtained by analyzing the quenching data using a modified Stern–Volmer formalism.

Graphical abstract: Gold nanoparticle-PPE constructs as biomolecular material mimics: understanding the electrostatic and hydrophobic interactions

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DOI
https://doi.org/10.1039/B811603B
Article type
Paper
Submitted
09 Jul 2008
Accepted
15 Oct 2008
First published
04 Dec 2008

Soft Matter, 2009,5, 607-612

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Gold nanoparticle-PPE constructs as biomolecular material mimics: understanding the electrostatic and hydrophobic interactions

R. L. Phillips, O. R. Miranda, D. E. Mortenson, C. Subramani, V. M. Rotello and U. H. F. Bunz, Soft Matter, 2009, 5, 607 DOI: 10.1039/B811603B

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