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Size Matters: Influence of Gold-to-Ligand Ratio and Sulfur-Sulfur Distance of Linear Thioether Heptamers on the Size of Gold Nanoparticles

Lehmann, Mario and Peters, Erich Henrik and Mayor, Marcel. (2017) Size Matters: Influence of Gold-to-Ligand Ratio and Sulfur-Sulfur Distance of Linear Thioether Heptamers on the Size of Gold Nanoparticles. Helvetica Chimica Acta, 100 (4). e1600395.

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Official URL: http://edoc.unibas.ch/57919/

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Abstract

A systematic investigation of two parameters steering the size of linear octadentate heptamer-coated gold nanoparticles (AuNPs) is presented, being i) the chemical structure (sulfur-sulfur distance) of the coating thioether heptamer ligand and ii) the ratio of ligand to tetrachloroauric acid (HAuCl4) reduced during the formation of the AuNPs. For this purpose, a novel terphenyl-based thioether heptamer (Ter) is synthesized via an end-capping oligomerization strategy, comprising an increased distance between neighboring sulfur atoms in the ligand backbone compared to the meta-xylene- (Xyl) and tetraphenylmethane- (TPM) based heptamers. While for both investigated parameters a clear trend to various-sized NPs is shown, a stronger influence in the resulting sizes is observed by alteration of ligand to gold-ratio. Remarkable processability- and long-term stability-features were observed for AuNPs stabilized by the bulky tetraphenylmethane-based heptamer (TPM).
Faculties and Departments:05 Faculty of Science
05 Faculty of Science > Departement Chemie > Chemie > Molecular Devices and Materials (Mayor)
UniBasel Contributors:Mayor, Marcel and Lehmann, Mario and Peters, Erich Henrik
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Wiley
ISSN:0018-019X
e-ISSN:1522-2675
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:20 Dec 2017 08:59
Deposited On:20 Dec 2017 08:59

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