Dendritic functionalization of monolayer-protected gold nanoparticles

Journal Article · Tue Jun 05 04:00:00 EDT 2007 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2006.08.033· OSTI ID:21000659

Cutler, Erin C ^[1]; Lundin, Erik ^[1]; Garabato, B Davis ^[1]; Choi, Daeock ^[2]; Shon, Young-Seok ^[1]

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1. Department of Chemistry, Western Kentucky University, Bowling Green, Kentucky 42101 (United States)
2. Department of Chemistry, Sunchon National University, Suncheon 540-742 (Korea, Republic of)

This paper describes the facile synthesis of nanoparticle-cored dendrimers (NCDs) and nanoparticle megamers from monolayer-protected gold clusters using either single or multi-step reactions. First, 11-mercaptoundecanoic acid/hexanethiolate-protected gold clusters were synthesized using the Schiffrin reaction followed by the ligand place-exchange reaction. A convergent approach for the synthesis of nanoparticle-cored dendrimers uses a single step reaction that is an ester coupling reaction of hydroxy-functionalized dendrons with carboxylic acid-functionalized gold clusters. A divergent approach, which is based on multi-step reactions, employs the repetition of an amide coupling reaction and a Michael addition reaction to build polyamidoamine dendritic architectures around a nanoparticle core. Nanoparticle megamers, which are large dendrimer-induced nanoparticle aggregates with an average diameter of more than 300 nm, were prepared by the amide coupling reaction between polyamiodoamine [G-2] dendrimers and carboxylic acid-functionalized gold clusters. {sup 1}H NMR spectroscopy, FT-IR spectroscopy, thermogravimetric analysis (TGA), and transmission electron microscopy (TEM) were used for the characterization of these hybrid nanoparticles.

• OSTI ID: 21000659
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 6 Vol. 42; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBOXYLIC ACIDS
CHEMICAL PREPARATION
COUPLING
DENDRITES
ESTERS
FOURIER TRANSFORMATION
GOLD
INFRARED SPECTRA
LIGANDS
NANOSTRUCTURES
NUCLEAR MAGNETIC RESONANCE
SPECTROSCOPY
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY