Abstract
AbstractThe preparation of stable and size‐uniform AuNPs (AuNPs=gold nanoparticles) has gained extensive attention. Strongly coordinating 1,2,3‐triazole‐based mesoionic carbenes are suitable capping agents to stabilize AuNPs, but such chemistry has been rarely explored. In this work, a series of newly synthesized triazolin‐5‐ylidenes with varying wingtips have been exploited as the capping ligands. Two different synthetic approaches have been explored and compared, which employed either gold(I) complexes or gold(III) species as the precursors. The gold nanomaterials synthesized via these two routes show different characteristics in terms of particle size, surface oxidation state as well as colloidal stability. It was found that the carbene with two long aliphatic wingtips is the best capping ligand giving relatively stable and monodisperse AuNPs. In addition, one of the gold nanomaterials, NP‐IIc, has exhibited good stability in the presence of biologically relevant agents including PBS, cysteine and glutathione, which implies its potential biological applications.
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