Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 26, Issue 68, Pages 15859-15862Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202003679
Keywords
gold nanoparticles; N-acyclic carbenes; N-heterocyclic carbenes; nonsymmetric carbenes; water dispersible nanoparticles
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Funding
- University of Vienna
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N-heterocyclic carbenes (NHCs) have received significant attention as gold nanoparticle stabilizers due to their strong binding affinity towards gold. However, their tunability is limited by the difficulty in obtaining nonsymmetric NHCs. In this regard, N-acyclic carbenes (NACs) are attractive alternatives due to their high synthetic versatility, allowing easy tuning of their steric and electronic properties towards specific applications. This work reports the first series of stable and monodisperse NAC-functionalized gold nanoparticles. These particles with sizes ranging 3.8 to 11.6 nm were characterized using NMR, UV/Vis and TEM. The nanoparticles display good stability at elevated temperatures and for extended periods both dried or dispersed in a medium, as well as in the presence of exogenous thiols. Importantly, these NAC-stabilized gold nanoparticles offer a promising and versatile alternative to NHC-stabilized gold nanoparticles.
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