The 44 atom core Ni38Pt6 in the metal cluster compound [HNi38Pt6(CO)(48)](5-) is the largest metal atom core, that has been realized in a single crystal. By Pt-195 NMR we have studied the electron density at the Pt-core atoms in powders and single crystals of two varieties of this compound. The large line widths can be explained by charge fluctuations between the metal cores, which are about 17 Angstrom apart. The relaxation rates, which resemble those in randomly-packed Pt309 cluster compounds, confirm such an interpretation.
NMR in powders and single crystals of the metal-alloy cluster [HNi38Pt6(CO)(48)](5-) / H. Brom, J. vanderKlink, F. Fritschij, L. deJongh, R. DellaPergola, A. Ceriotti - In: Clusters Models for Surface and Bulk Phenomena[s.l] : Plenum Press, 1997. - pp. 559-561 (( convegno 8th International Symposium on Small Particles and Inorganic Clusters (ISSPIC 8) tenutosi a COPENHAGEN, DENMARK nel JUL 01-06, 1996.
NMR in powders and single crystals of the metal-alloy cluster [HNi38Pt6(CO)(48)](5-)
A. CeriottiUltimo
1997
Abstract
The 44 atom core Ni38Pt6 in the metal cluster compound [HNi38Pt6(CO)(48)](5-) is the largest metal atom core, that has been realized in a single crystal. By Pt-195 NMR we have studied the electron density at the Pt-core atoms in powders and single crystals of two varieties of this compound. The large line widths can be explained by charge fluctuations between the metal cores, which are about 17 Angstrom apart. The relaxation rates, which resemble those in randomly-packed Pt309 cluster compounds, confirm such an interpretation.
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