Molecular aspects of oligomer-coupled ultra-small Au nanoparticles

Newmai, M. Boazbou; Pathak, Nilesh Kumar; Kumar, Pradeep

doi:10.1016/j.jpcs.2020.109378

Cited by 3 publications

(1 citation statement)

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“…Spectra arising from the laser ablation of an Au target contain peaks compatible with polyynes ranging between C 6 H 2 and C 16 H 2 (Figure b) and also exhibit new absorption peaks at 205, 212, 218, and 231 nm. These peaks are distinct from absorbances known for Au nanoparticles or ligand-passivated Au nanoclusters. − Thus, we propose that these peaks are signatures of Au-pseudocarbynes and arise from an association between Au clusters and carbon chains.…”

Section: Resultsmentioning

confidence: 69%

Pseudocarbynes: Linear Carbon Chains Stabilized by Metal Clusters

et al. 2020

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Pseudocarbynes, defined as linear carbon chains stabilized by noncovalent bonding to a metal cluster, were synthesized via laser ablation of a liquid/metal interface, in this case, gold (Au) in ethanol. We present UV–vis, Raman, and IR spectra that collectively demonstrate the formation of Au-pseudocarbynes. The Au-pseudocarbynes presented here likely consist of polyynes containing fewer than 16 carbon atoms associated with subnanometer Au clusters. Their characteristic spectral signatures are supported by density functional theory calculations that highlight the interaction between the Au clusters and the π network of −CC– chains. This class of molecules represents a synergy between sp-hybridized carbon chains and small metal clusters that stabilize one another.

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