Size-Dependent Ligand Quenching of Ferromagnetism in Co3(benzene)n+ Clusters Studied with X-ray Magnetic Circular Dichroism Spectroscopy

Scott T. Akin, Vicente Zamudio-Bayer, Kaining Duanmu, Georg Leistner, Konstantin Hirsch, Christine Bülow, Arkadiusz Lawicki, Akira Terasaki, Bernd Von Issendorff, Donald G. Truhlar, J. Tobias Lau, Michael A. Duncan

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Abstract

Cobalt-benzene cluster ions of the form Co3(bz)n+ (n = 0-3) were produced in the gas phase, mass-selected, and cooled in a cryogenic ion trap held at 3-4 K. To explore ligand effects on cluster magnetic moments, these species were investigated with X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) spectroscopy. XMCD spectra yield both the spin and orbital angular momenta of these clusters. Co3+ has a spin magnetic moment of μS = 6 μB and an orbital magnetic moment of μL = 3 μB. Co3(bz)+ and Co3(bz)2+ complexes were found to have spin and orbital magnetic moments identical to the values for ligand-free Co3+. However, coordination of the third benzene to form Co3(bz)3+ completely quenches the high spin state of the system. Density functional theory calculations elucidate the spin states of the Co3(bz)n+ species as a function of the number of attached benzene ligands, explaining the transition from septet to singlet for n = 0 → 3.

Original languageEnglish
Pages (from-to)4568-4575
Number of pages8
JournalJournal of Physical Chemistry Letters
Volume7
Issue number22
DOIs
Publication statusPublished - Nov 17 2016

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Circular dichroism spectroscopy
Ferromagnetism
Benzene
Magnetic moments
ferromagnetism
dichroism
Quenching
quenching
Ligands
benzene
X rays
ligands
magnetic moments
spectroscopy
x rays
orbitals
Ions
X ray absorption spectroscopy
Angular momentum
Dichroism

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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Size-Dependent Ligand Quenching of Ferromagnetism in Co3(benzene)n+ Clusters Studied with X-ray Magnetic Circular Dichroism Spectroscopy. / Akin, Scott T.; Zamudio-Bayer, Vicente; Duanmu, Kaining; Leistner, Georg; Hirsch, Konstantin; Bülow, Christine; Lawicki, Arkadiusz; Terasaki, Akira; Issendorff, Bernd Von; Truhlar, Donald G.; Lau, J. Tobias; Duncan, Michael A.

In: Journal of Physical Chemistry Letters, Vol. 7, No. 22, 17.11.2016, p. 4568-4575.

Research output: Contribution to journalArticle

Akin, ST, Zamudio-Bayer, V, Duanmu, K, Leistner, G, Hirsch, K, Bülow, C, Lawicki, A, Terasaki, A, Issendorff, BV, Truhlar, DG, Lau, JT & Duncan, MA 2016, 'Size-Dependent Ligand Quenching of Ferromagnetism in Co3(benzene)n+ Clusters Studied with X-ray Magnetic Circular Dichroism Spectroscopy', Journal of Physical Chemistry Letters, vol. 7, no. 22, pp. 4568-4575. https://doi.org/10.1021/acs.jpclett.6b01839
Akin, Scott T. ; Zamudio-Bayer, Vicente ; Duanmu, Kaining ; Leistner, Georg ; Hirsch, Konstantin ; Bülow, Christine ; Lawicki, Arkadiusz ; Terasaki, Akira ; Issendorff, Bernd Von ; Truhlar, Donald G. ; Lau, J. Tobias ; Duncan, Michael A. / Size-Dependent Ligand Quenching of Ferromagnetism in Co3(benzene)n+ Clusters Studied with X-ray Magnetic Circular Dichroism Spectroscopy. In: Journal of Physical Chemistry Letters. 2016 ; Vol. 7, No. 22. pp. 4568-4575.
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