Oxidation of benzylic compounds by gold nanowires at 1 atm O₂

Abstract

Ultra-thin gold nanowires (GNWs), with uniform surface crystallinity, appear much more active than gold nanoclusters in benzylic compound oxidation. Ethylbenzene oxidation was used as a model reaction and a radical chain reaction mechanism was revealed by the DFT method.

Surface Segregated AgAu Tadpole‐Shaped Nanoparticles Synthesized Via a Single Step Combined Galvanic and Citrate Reduction Reaction

“…The formation of anisotropic nanostructures by the coalescenceo fm ultiple nanocrystal subunits, termedo riented attachment, has also been widely reported. [2,4,[32][33][34] Such non-classical growth mechanisms can yield single crystalline nanorods and nanowires, sometimes with non-faceted shapes similart ot he tails observed in this work. [35][36][37] The ability for spherical gold nanocrystals to assemble into 1D chains in water has been directly observed with in situ electron microscopy,with their anisotropic assembly attributed to dipole-dipole and van der Waals interactions.…”

“…One dimension (1D) nanomaterials based on Au have attracted considerable attention for applications that include catalysis,1, 2 surface‐enhanced Raman scattering (SERS) detection,3–5 biosensors,6 and the development of nanomotors 7. 8 Among several 1D morphologies, tadpoles are particularly interesting as a result of their unique shape comprising a spherical head and a high aspect ratio tail 9–11.…”

Doped Graphene as a Metal‐Free Carbocatalyst for the Selective Aerobic Oxidation of Benzylic Hydrocarbons, Cyclooctane and Styrene

“…Lowering the reaction temperature to 70 °C did not result in styrene oxidation, which indicates that radical generation is more facile at temperatures of about 100 °C. Gold nanowires (0.025 wt % Au)47 and ultra‐small gold nanoclusters48 have also been reported as catalysts for the aerobic oxidation of styrene. For example, by using gold nanowires as catalyst, 23.2 % styrene conversion was observed in dimethylformamide with yields of 6.5 % BA and 14.7 % SO at 100 °C after 20 h. Comparison of the data shows that our procedure produces better results and enjoys the advantage of using a sustainable catalyst in the absence of any noble metals and solvent.…”

The spontaneous formation and plasmonic properties of ultrathin gold–silver nanorods and nanowires stabilized in oleic acid

“…1 In the case of gold, several reports have recently dealt with the synthesis of Au UNWs and the study of their mechanical, 2 electrical, 3 imaging, 4,5 SERS 6 or catalytic 7 properties. 1 In the case of gold, several reports have recently dealt with the synthesis of Au UNWs and the study of their mechanical, 2 electrical, 3 imaging, 4,5 SERS 6 or catalytic 7 properties.…”