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Alkyne-Monofunctionalized Gold Nanoparticles as Massive Molecular Building Blocks

Peters, Erich Henrik; Mayor, Marcel

Abstract:
Using a tripodal, thioether-based ligand comprising a remote protected acetylene, we efficiently stabilize small gold nanoparticles (Ø ≈ 1.2 nm) which are isolated and purified by chromatography. The 1:1 ligand-to-particle ratio is obtained by comparing the particles' dimensions measured by transmission electron microscopy with the weight fraction of the coating ligand determined by thermogravimetric analysis. The single ligand coating of the gold particle guarantees the presence of a single masked alkyne per particle. It can be addressed by wet chemical protocols providing the particles with the properties of “massive molecules”. The “massive molecule” nature of the particles is demonstrated by involving them in wet chemical coupling protocols like oxidative acetylene coupling providing gold nanoparticle dimers (34 % isolated yield) or alkyne-azide “click”-chemistry with a suitable triazide, giving trimeric particle architectures (30 % determined by transmission electron microscopy). The particle stabilization obtained by the coating ligand allows, for the first time, to treat these multi-particle architectures by size exclusion chromatography.

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Verlagsausgabe §
DOI: 10.5445/IR/1000120013
Veröffentlicht am 05.06.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 30.06.2020
Sprache Englisch
Identifikator ISSN: 1434-1948
KITopen-ID: 1000120013
HGF-Programm 43.21.04 (POF III, LK 01) Molecular Engineering
Erschienen in European journal of inorganic chemistry
Verlag Wiley-VCH Verlag
Band 24
Seiten 2325-2334
Vorab online veröffentlicht am 04.05.2020
Nachgewiesen in Dimensions
Web of Science
Scopus
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