A Benchtop Method for Appending Protic Functional Groups to N‐Heterocyclic Carbene Protected Gold Nanoparticles
作者： Joseph F. DeJesus , Lindy M. Sherman , Darius J. Yohannan , Jeffrey C. Becca , Shelby L. Strausser
关键词: Nanoparticle 、 Aqueous solution 、 Noble metal 、 Amide 、 Surface modification 、 Ligand 、 Combinatorial chemistry 、 Chemistry 、 Colloidal gold 、 Carbene
摘要: The remarkable resilience of N-heterocyclic carbene (NHC) gold bonds has quickly made NHCs the ligand choice when functionalizing surfaces. Despite rapid progress using deposition from free or CO2 -protected NHCs, synthetic challenges hinder functionalization NHC surfaces with protic functional groups, such as alcohols and amines, particularly on larger nanoparticles. Here, we synthesize NHC-functionalized gold(I) complexes aqueous nanoparticles without need for additional reagents, enabling otherwise difficult groups to be appended carbene. NHC-Au bond allows multi-step post-synthetic modification. Beginning nitro-NHC, form an amine-NHC terminated surface, which further undergoes amide coupling carboxylic acids. simplicity this approach, its compatibility nanoparticle solutions, ability yield functionality, greatly expands potential noble metal
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