MnIII zero-field splitting parameters and weak exchange interactions in a cyanide-bridged {MnIII-IrΙΙI-MnIII} cluster

Kasper Steen Pedersen, Marc Sigrist, Høgni Weihe, Philip L. W. Tregenna-Piggott, Magnus Schau-Magnussen, Jan Dreiser, Hannu Mutka, Anne-Laure Barra, Jesper Bendix

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The reaction of [MnIII(5-Brsalen)(MeOH)](ClO4) (5-Brsalen2-=N,N'-ethylenebis(5-bromosalicylidene-iminate)) with [IrIII(CN)6]3- yields a trinuclear, cyanide-bridged MnIII-(IrIII-MnIII) cluster which is a member of an isostructural series of MnIII-MIII-MnIII clusters. The presence of the large, diamagnetic [IrIII(CN)6]3- bridging unit facilitates a precise determination of the MnIII zero-field splitting (zfs) parameters by the combined use of inelastic neutron scattering, high-field, high-frequency EPR spectroscopy and magnetic measurements. The single-ion axial (D) and rhombic (E) zfs parameters are found to be D = - 3.72(5) cm-1 and vertical bar E vertical bar=021(1) cm-1. The experimental data are consistent with a small, antiferromagnetic exchange interaction between the two MnIII ions.
Original languageEnglish
JournalInorganic Chemistry Communications
Volume24
Pages (from-to)24-28
ISSN1879-0259
DOIs
Publication statusPublished - 2012
Externally publishedYes

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