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Ultrasmall atomically precise monolayer- protected gold thiolate nanoclusters are an intensely researched nanomaterial framework, but there is a lack of a system that can be directly synthesized and undergo interfacial… Click to show full abstract
Ultrasmall atomically precise monolayer- protected gold thiolate nanoclusters are an intensely researched nanomaterial framework, but there is a lack of a system that can be directly synthesized and undergo interfacial surface chemistry. We report an [Au25(SCH2CH2-p-C6H4-N3)18]- nanocluster plat- form with azide moieties appended onto each surface ligand. The structure of this surface reactive cluster has been confirmed by single-crystal X-ray crystallography, mass spectrometry and UV- Vis, IR and NMR spectroscopies. We show that all surface azide moieties are amenable to cluster-surface strain-promoted alkyne- azide cycloaddition (CS-SPAAC) chemistry with a strained cy- clooctyne, opening this as a new platform to allow functional, post-assembly surface modifications to this very prominent nanocluster.
Journal Title: Journal of the American Chemical Society
Year Published: 2019
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