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Giant Palladium Clusters: Synthesis and Characterization

Published online by Cambridge University Press:  15 February 2011

Ilya I. Moiseev,
Michael N. Vargaftik,
Kirill I. Zamaraev and
Dmitry I. Kochubey
Ilya I. Moiseev
Affiliation:
N.S.Kurnakov Institute of General & Inorganic Chemistry, Russian Academy of Sciences, Moscow 117907, Russia
Michael N. Vargaftik
Affiliation:
N.S.Kurnakov Institute of General & Inorganic Chemistry, Russian Academy of Sciences, Moscow 117907, Russia
Kirill I. Zamaraev
Affiliation:
Institute of Catalysis, Syberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
Dmitry I. Kochubey
Affiliation:
Institute of Catalysis, Syberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
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Abstract

A series of palladium clusters containing from 4 to some hundred Pd atoms in the metal skeleton was prepared and characterized with structural data as well as by chemical properties including catalytic activity. An agreement between X-ray and EXAFS data was obtained for single-crystal low-molecular clusters. Giant clusters approximated as Pd56L60(OCOCH3)180 (L=Phen, Bipy) and Pd561Phen60O60X60 (X = PF6, CIO4, SO4, BF4, CF3COO)were characterized with TEM, SAXS, EXAFS, NMR, and magnetic susceptibility data. The clusters consisting of close-packed metal core and L, X ligands at its periphery could be considered as a bridge between low-molecular clusters and the particles of colloidal metals.

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References

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