Issue 3, 2009

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

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

Supplementary files

Additions and corrections

Article information

Article type
Paper
Submitted
09 Jul 2008
Accepted
15 Oct 2008
First published
04 Dec 2008

Soft Matter, 2009,5, 607-612

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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