<abstract xmlns="http://www.w3.org/1999/xhtml">Nuclear magnetic resonance spectroscopy (NMR) 1H, 35Cl, 27Al and 13C was applied to study underlying processes at the various stages of the synthesis of Au/Al nanoparticles. 35Cl spectrum was downfield shifted by 2.6 ppm as to the reference signal of the hydrated Cl− ion in NaCl solution. The evolution of the NMR spectra points to the formation of the stabilized shell around the gold containing nucleus. The shell restricts the supply of the reducing agents, which is the condition for the formation of Au2+ state at the concentration range in question. The electron paramagnetic resonance (EPR) spectra reveal formation of both Au2+ (<italic>g</italic> = 2.17) and Au+ (<italic>g &lt;</italic> 2) intermediates incompletely reduced as well as Au0 clusters (<italic>g</italic> = 2.062) with odd number of atoms. The latter is coupled in many cases by the narrow signal with <italic>g</italic> = 2.0048 attributed to the radical in the supporting surrounding (tannin containing matrix in our case).</abstract>

Nuclear magnetic resonance spectroscopy (NMR) 1H, 35Cl, 27Al and 13C was applied to study underlying processes at the various stages of the synthesis of Au/Al nanoparticles. 35Cl spectrum was downfield shifted by 2.6 ppm as to the reference signal of the hydrated Cl− ion in NaCl solution. The evolution of the NMR spectra points to the formation of the stabilized shell around the gold containing nucleus. The shell restricts the supply of the reducing agents, which is the condition for the formation of Au2+ state at the concentration range in question. The electron paramagnetic resonance (EPR) spectra reveal formation of both Au2+ (g = 2.17) and Au+ (g < 2) intermediates incompletely reduced as well as Au0 clusters (g = 2.062) with odd number of atoms. The latter is coupled in many cases by the narrow signal with g = 2.0048 attributed to the radical in the supporting surrounding (tannin containing matrix in our case).

NMR study of Au/Al nanosytems in solution

G. V. Kurdyumov Institute of Metal Physics

Institute of Sorption and Problems of Endoecology

V. I. Vernadskiy Institute of General and Inorganic Chemistry

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"NMR study of Au/Al nanosytems in solution"}

Nuclear magnetic resonance spectroscopy (NMR) 1H, 35Cl, 27Al and 13C was applied to study underlying processes at the various stages of the synthesis of Au/Al...

NMR study of Au/Al nanosytems in solution

Online veröffentlicht: 28. Sept. 2019

Seitenbereich: 95 - 100

Eingereicht: 19. März 2019

DOI: https://doi.org/10.2478/jee-2019-0048

Schlüsselwörter
NMR, EPR, nanoclusters, UV-vis spectroscopy

© 2019 Victor Kislyuk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

NMR study of Au/Al nanosytems in solution

Online veröffentlicht: 28. Sept. 2019

Seitenbereich: 95 - 100

Eingereicht: 19. März 2019

DOI: https://doi.org/10.2478/jee-2019-0048

SchlüsselwörterNMR, EPR, nanoclusters, UV-vis spectroscopy

© 2019 Victor Kislyuk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Schlüsselwörter
NMR, EPR, nanoclusters, UV-vis spectroscopy