Stern-Gerlach study of multidecker lanthanide-cyclooctatetraene sandwich clusters

Ken Miyajima, Mark B. Knickelbein, Atsushi Nakajima

Research output: Contribution to journalArticle

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Abstract

Multilayer lanthanide-cyclooctatetraene organometallic clusters, Ln n(C8H8)m, (Ln = Eu, Tb, Ho, Tm; n = 1 - 7; m = n - 1, n, n + 1) were produced by a laser vaporization synthesis method. The magnetic deflections of these organometallic sandwich clusters were measured by a molecular beam magnetic deflection technique. Most of the sandwich species displayed one-sided deflection, while some of smaller Ln-C 8H8 clusters showed symmetric broadening without or with only very small (or absent) net high-field deflection. In general, the total magnetic moments, calculated from the magnitude of the beams deflections, increase with the number of lanthanide atoms (i.e., with increasing sandwich layers); however for Tb-, Ho-, and Tm-C8H8 clusters with n > 3, the suppression of the magnetic moments was observed, possibly through antiferromagnetic interactions. For Eu-C8H8 clusters, we observe a linear increase of the magnetic moments with the number of Eu atoms up to n = 7, with average magnetic moment per Eu atom around 7 μB - similar to that displayed by conventionally synthesized mononuclear Eu IIC8H8 complexes, indicating that Eu atoms exist as Eu2+ ions in the full sandwich Eun(C 8H8)n+1 clusters. These results suggest that Eun(C8H8)n+1 is a promising candidate for a high-spin, one-dimensional building block in organometallic magnetic materials.

Original languageEnglish
Pages (from-to)366-375
Number of pages10
JournalJournal of Physical Chemistry A
Volume112
Issue number3
DOIs
Publication statusPublished - 2008 Jan 24

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Lanthanoid Series Elements
Magnetic moments
Organometallics
deflection
Atoms
magnetic moments
Molecular beams
atoms
Magnetic materials
Vaporization
Multilayers
Ions
magnetic materials
molecular beams
Lasers
retarding
synthesis
lasers
ions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Stern-Gerlach study of multidecker lanthanide-cyclooctatetraene sandwich clusters. / Miyajima, Ken; Knickelbein, Mark B.; Nakajima, Atsushi.

In: Journal of Physical Chemistry A, Vol. 112, No. 3, 24.01.2008, p. 366-375.

Research output: Contribution to journalArticle

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